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Akpan, Unyime Okon. "Dynamics of flexible mobile manipulator structures." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ31515.pdf.
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Frejek, Michael C. "Novel tele-operation of mobile-manipulator systems." Thesis, UOIT, 2009. http://hdl.handle.net/10155/32.
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A novel algorithm for the simplified tele-operation of mobile-manipulator systems is
presented. The algorithm allows for unified, intuitive, and coordinated control of
mobile manipulators, systems comprised of a robotic arm mounted on a mobile base.
Unlike other approaches, the mobile-manipulator system is modeled and controlled
as two separate entities rather than as a whole. The algorithm consists of thee states.
In the rst state a 6-DOF (degree-of-freedom) joystick is used to freely control the
manipulator's position and orientation. The second state occurs when the manipulator
approaches a singular configuration, a con guration where the arm instantaneously
loses a DOF of motion capability. This state causes the mobile base to proceed in
such a way as to keep the end-effector moving in its last direction of motion. This
is done through the use of a constrained optimization routine. The third state is
triggered by the user: once the end-effector is in the desired position, the mobile
base and manipulator both move with respect to one another keeping the end-effector
stationary and placing the manipulator into an ideal configuration. The proposed
algorithm avoids the problems of algorithmic singularities and simplifies the control
approach. The algorithm has been implemented on the Jasper Mobile-Manipulator
System. Test results show that the developed algorithm is effective at moving the
system in an intuitive manner.
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Amoako-Frimpong, Samuel. "Search Methods for Mobile Manipulator Performance Measurement." Thesis, Marquette University, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10841175.
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Mobile manipulators are a potential solution to the increasing need for additional flexibility and mobility in industrial robotics applications. However, they tend to lack the accuracy and precision achieved by fixed manipulators, especially in scenarios where both the manipulator and the autonomous vehicle move simultaneously. This thesis analyzes the problem of dynamically evaluating the positioning error of mobile manipulators. In particular, it investigates the use of Bayesian methods to predict the position of the end-effector in the presence of uncertainty propagated from the mobile platform. Simulations and real-world experiments are carried out to test the proposed method against a deterministic approach. These experiments are carried out on two mobile manipulators—a proof-of-concept research platform and an industrial mobile manipulator—using ROS and Gazebo. The precision of the mobile manipulator is evaluated through its ability to intercept retroreflective markers using a photoelectric sensor attached to the end-effector. Compared to the deterministic search approach, we observed improved interception capability with comparable search times, thereby enabling the effective performance measurement of the mobile manipulator.
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Bostelman, Roger. "Performance measurement of mobile manipulators." Thesis, Bourgogne Franche-Comté, 2018. http://www.theses.fr/2018UBFCK003/document.
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Une approche avancée de la fabrication flexible consiste à déplacer des manipulateurs robotisés AGV ou robot mobile, appelé manipulateurs mobiles, entre les postes de travail. L'utilisation de manipulateurs mobiles peuvent être avantageux dans un certain nombre de situations. Cela peut entraîner des coûts économies lorsqu'un seul manipulateur mobile peut être utilisé pour remplacer plusieurs stationnaires manipulateurs. Cependant, les manipulateurs mobiles sont «une discipline relativement jeune robotique. "Une revue de la littérature approfondie de la recherche menant à la commercialisation mobile manipulateurs et robots mobiles a été réalisée. La mesure de la performance du mobile les manipulateurs, y compris une base mobile avec un bras de robot embarqué, sont pratiquement inexistants. Cependant, les manipulateurs mobiles commencent à apparaître dans la fabrication, la santé, et peut-être d'autres industries et, par conséquent, une méthode pour mesurer leur performance est essentielle pour les fabricants et les utilisateurs de ces systèmes relativement complexes. Mesures de mobile manipulateurs effectuant des tâches standard (poses et mouvements) sont également inexistants, sauf pour simplement s'assurer que la tâche a été plus ou moins complétée. La tâche choisie pour cela thèse est l'assemblage en raison de son exigence de pose de système.Les méthodes de test de performance ont pris du retard par rapport aux méthodes de test de sécurité pour les manipulateurs mobiles qui progresse vers le développement d'une nouvelle norme de sécurité aux États-Unis. Métriques pour la sécurité et la performance des manipulateurs mobiles comprennent de nombreux domaines, tels que: l'achèvement des tâches, le temps nécessaire pour accomplir la tâche, la qualité et la quantité (c.-à-d.répétabilité, respectivement) des tâches accomplies. Avant l'acceptation industrielle et les normes développement pour les manipulateurs mobiles, les utilisateurs de ces nouveaux systèmes attendront des fabricants fournir des données de performance réelles pour guider leur approvisionnement et assurer l'aptitude à tâches d'application. En raison du coût relativement élevé pour acquérir et installer des systèmes de suivi de mouvement Pour mesurer la performance des systèmes, une méthode alternative à utiliser par les fabricants et les utilisateurs est idéal. Un nouveau concept de méthode de test qui utilise un artefact, appelé mobile reconfigurable Manipulateur Artefact (RMMA), est décrit dans cette thèse et comparé à un suivi optique système qui a été utilisé comme vérité de terrain pour le RMMA et manipulateur mobile. Système de modélisation du système de manipulation mobile, des composants et des les mesures peuvent aider à améliorer la compréhension de ces systèmes relativement complexes.Systems Modelling Language (SysML) a été choisi et utilisé tout au long de cette thèse, car de SysML a des modules logiciels réutilisables pour la structure, le comportement, les exigences et parametrics sur le manipulateur mobile. Les modèles décrivent les nombreux aspects de mesurer la performance des manipulateurs mobiles également en tant que nouveau domaine de recherche.Les modèles étaient évalué à travers des expériences sur un exemple de composants manipulateurs mobiles et l'ensemble système. SysML a été utilisé pour décrire la base théorique de la performance à travers la propagation de l'incertitude lorsque les équations mathématiques sont également modélisées.Un cas d'utilisation est modélisé et décrit où les concepts recherchés pour mesurer les mobiles les performances du manipulateur sont appliquées à une implémentation de fabrication. Le simpliste la nature du processus de mesure utilisant le RMMA peut être directement appliquée à processus de fabrication, et étendu au-delà des contributions de cette recherche à d'autres des besoins de mesure encore plus complexes (...)An advanced approach to flexible manufacturing is to move robotic manipulators, using anAGV or mobile robot, called mobile manipulators, between workstations. The use ofmobile manipulators can be advantageous in a number of situations. It can result in costsavings when a single mobile manipulator can be used to replace several stationarymanipulators. However, mobile manipulators are “a relatively young discipline withinrobotics.” An extensive literature review of the research leading to commercial mobilemanipulators and mobile robots was performed. The performance measurement of mobilemanipulators, including a mobile base with an onboard robot arm, is virtually non-existent.However, mobile manipulators are beginning to appear in manufacturing, healthcare, andpossibly other industries and therefore, a method to measure their performance is critical toboth manufacturers and users of these relatively complex systems. Measurements of mobilemanipulators performing standard tasks (poses and motions) are also non-existent except forsimply ensuring that the task has been more or less completed. The task chosen for thisthesis is assembly due to its requirement for relatively precise system posing.Performance test methods have lagged behind safety test methods for mobile manipulatorswhich is progressing towards development of a new safety standard in the US. Metrics forsafety and performance of mobile manipulators include many areas, such as: safe operation,task completion, time to complete the task, quality, and quantity (i.e., accuracy andrepeatability, respectively) of tasks completed. Prior to industrial acceptance and standardsdevelopment for mobile manipulators, users of these new systems will expect manufacturersto provide real performance data to guide their procurement and assure suitability for givenapplication tasks. Due to the relatively high cost to procure and setup motion tracking systemsto measure systems performance, an alternative method for use by manufacturers and users isideal. A new test method concept that uses an artifact, called the Reconfigurable MobileManipulator Artifact (RMMA), is described in this thesis and compared to an optical trackingsystem that was used as ground truth for the RMMA and mobile manipulator.System modeling the mobile manipulator system, components, and the associatedmeasurements can help to improve the understanding of these relatively complex systems.Systems Modeling Language (SysML) was chosen and used throughout this thesis becauseof SysML has reusable software modules for structure, behavior, requirements andparametrics off the mobile manipulator. The models describe the many aspects ofmeasuring mobile manipulator performance also as new research area. The models wereevaluated through experiments on an example mobile manipulator components and the entiresystem. SysML was used to describe the theoretical basis of the performance throughpropagation of uncertainty where mathematical equations are also modeled.A use case is modeled and described where the concepts researched to measure mobilemanipulator performance are applied to a manufacturing implementation. The simplisticnature of the measurement process using the RMMA can be directly applied to today’smanufacturing processes, and extended beyond the contributions of this research to othereven more complex measurement needs. The research is also discussed to even apply tocross-industry test methods for exoskeletons worn by humans
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Gong, Kelvin. "A Modular, Behaviour-Based Hierarchical Controller For Mobile Manipulators." Thesis, University of Canterbury. Electrical and Computer Engineering, 2013. http://hdl.handle.net/10092/8375.
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A mobile manipulator is a robotic system consisting of a robotic manipulator mounted
onto a mobile base. This greatly extends the workspace of the robotic manipulator
and allows it to perform more tasks. However, combining both systems increases the
complexity of the control task as well as introducing additional controller tasks such
as coordination of motion, where executing the task can involve using both the mobile
base and manipulator, and cooperation of task, where many tasks can be executed at
once.
In this thesis a controller for a mobile manipulator is developed from smaller,
simple controller blocks, allowing the controller to be flexible, easy to understand,
and straightforward to implement using well-known embedded software implementation
approaches. A behaviour-based approach was used to build the individual controllers,
and a hierarchical structure was used to organise the individual controllers to provide
cooperation between them and coordinated motion.
The task assigned to the controller was to reach a series of waypoints in a large
workspace, while satisfying performance metrics of manipulability and tip-over sta-
bility. The operation of the controller was tested in simulation using 100 randomly
generated scenarios consisting of five randomly generated waypoints in each. Using
default thresholds for manipulability and tip-over stability, the controller was success-
fully able to complete all scenarios. Further simulations were then performed testing
the effects of varying the thresholds of the performance metrics to explore the tradeoffs
involved in different parameter choices. The controller was successful in a majority of
these scenarios, with only a few failing due to extreme threshold choices. The reasons
for these failures, and the corresponding lessons for robot designers are discussed.
Finally, to demonstrate the modularity of the controller, an obstacle avoidance con-
troller was added and simulation results showed the controller was capable of avoiding
obstacles while still performing the same tasks that were used in previous tests.
Successful simulation results of the controller across a range of performance metrics
shows that the combination of a behaviour based and hierarchical approach to mobile
manipulator control is not only capable of producing a functional controller, but also
one that is more modular and easier to understand than the monolithic controllers
developed by other researchers.
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Venator, Edward Stephen. "A Low-cost Mobile Manipulator for Industrial and Research Applications." Case Western Reserve University School of Graduate Studies / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=case1370512665.
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Ward, Keith Ronald. "Pseudo joint damping for reactive control of a mobile manipulator." Thesis, Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/17634.
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Traczinski, Holger. "Integration von Algorithmen und Datentypen zur validierten Mehrkörpersimulation in MOBILE." Berlin Logos-Verl, 2006. http://deposit.d-nb.de/cgi-bin/dokserv?id=2917159&prov=M&dok_var=1&dok_ext=htm.
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Chan, Julius Koi Wah. "Dynamics and control of an orbiting space platform based mobile flexible manipulator." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/29466.
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This paper presents a Lagrangian formulation for studying the dynamics and control of the proposed Space Station based Mobile Servicing System (MSS) for a particular case of in plane libration and maneuvers. The simplified case is purposely considered to help focus on the effects of structural and joint flexibility parameters of the MSS on the complex interactions between the station and manipulator dynamics
during slewing and translational maneuvers. The response results suggest that under critical combinations of parameters, the system can become unstable. During maneuvers, the deflection of the MSS can become excessive, leading to positioning error of the payload. At the same time the libration error can also be significant. A linear quadratic regulator is designed to control the deflection of the manipulator and maintain the station at its operating configuration.Applied Science, Faculty of
Mechanical Engineering, Department of
Graduate
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Counsell, M. "Haptic communication for remote mobile and manipulator robot operations in hazardous environments." Thesis, University of Salford, 2003. http://usir.salford.ac.uk/2039/.
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Nuclear decommissioning involves the use of remotely deployed mobile vehicles and manipulators controlled via teleoperation systems. Manipulators are used for tooling and sorting tasks, and mobile vehicles are used to locate a manipulator near to the area that it is to be operated upon and also to carry a camera into a remote area for monitoring and assessment purposes. Teleoperations in hazardous environments are often hampered by a lack of visual information. Direct line of sight is often only available through small, thick windows, which often become discoloured and less transparent over time. Ideal camera locations are generally not possible, which can lead to areas of the cell not being visible, or at least difficult to see. Damage to the mobile, manipulator, tool or environment can be very expensive and dangerous. Despite the advances in the recent years of autonomous systems, the nuclear industry prefers generally to ensure that there is a human in the loop. This is due to the safety critical nature of the industry. Haptic interfaces provide a means of allowing an operator to control aspects of a task that would be difficult or impossible to control with impoverished visual feedback alone. Manipulator endeffector force control and mobile vehicle collision avoidance are examples of such tasks. Haptic communication has been integrated with both a Schilling Titan II manipulator teleoperation system and Cybermotion K2A mobile vehicle teleoperation system. The manipulator research was carried out using a real manipulator whereas the mobile research was carried out in simulation. Novel haptic communication generation algorithms have been developed. Experiments have been conducted using both the mobile and the manipulator to assess the performance gains offered by haptic communication. The results of the mobile vehicle experiments show that haptic feedback offered performance improvements in systems where the operator is solely responsible for control of the vehicle. However in systems where the operator is assisted by semi autonomous behaviour that can perform obstacle avoidance, the advantages of haptic feedback were more subtle. The results from the manipulator experiments served to support the results from the mobile vehicle experiments since they also show that haptic feedback does not always improve operator performance. Instead, performance gains rely heavily on the nature of the task, other system feedback channels and operator assistance features. The tasks performed with the manipulator were peg insertion, grinding and drilling.
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Khan, Muhammad Aqib. "Design and control of a robotic system based on mobile robots and manipulator arms for picking in logistics warehouses." Thesis, Normandie, 2020. http://www.theses.fr/2020NORMLH31.
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La logistique consiste à stocker, déplacer et expédier des marchandises à des détaillants ou clients finaux tant en garantissant une gestion efficace des flux d’information sous-jacents. Les travaux menés durant cette thèse visent à automatiser le processus de préparation de commande sur palette en introduisant des robots manipulateurs mobiles dans les entrepôts logistiques, avec un double objectif : diminuer la pénibilité du travail et augmenter la productivité face à la croissance des volumes traités.Après un état de l’art exhaustif sur les robots manipulateurs mobiles, l’auteur met en œuvre un ensemble de procédés et processus afin de prélever des colis sur des palettes disposées sous des racks et cela en toute autonomie. Des blocs fonctionnels sont ainsi constitués pour réaliser l’ensemble des tâches pour la base mobile (cartographie, localisation, planification, navigation) ainsi que pour le bras manipulateur. Une disposition originale et inédite des capteurs sur le manipulateur mobile ainsi que la mise en place d’ARtag sur les éléments d’infrastructures permettent de récupérer des « smart data » plutôt que du « big data », permettant de conjuguer la complexité du problème avec les contraintes temps réel de l’application.Un algorithme de suivi d’un « mur virtuel » est proposé utilisant une transformée de Hough rendue plus robuste grâce à plusieurs niveaux de filtrage. La synchronisation et la commande de ces deux systèmes est assurée par des réseaux de Pétri. Enfin le prototype développé durant cette thèse CIFRE a été non seulement testé au laboratoire mais aussi dans les conditions réelles d’un entrepôt logistiqueLogistics involves the storage and displacement of goods. These goods are stored in warehouses and shipped to retailers in pallets. Pallets are produced on a customer’s order. Order picking for a pallet is a fatigue induced process resulting in poor performance of the workers, decreasing the productivity and inducing delays in supply chain. Flexibility is introduced to increase productivity by commissioning robots for process automation. These robots consist of autonomous ground vehicles for transporting freight and static manipulators for pick and place. A static robot has limited workspace and the capability of a manipulator is significantly enhanced by adding a mobile base. Mobile manipulation is now being exploited for pick & place and pallet production. This thesis presents a first attempt to achieve autonomous palletization using mobile manipulation. To acquire palletization by mobile manipulation requires the identification of functional blocks, to conceive a framework to achieve this task. A thorough state of the art has been prepared in this thesis corresponding to each element of the global framework. To realize the proof of concept, a prototype has been developed by leveraging existing technologies, by integrating a mobile base with manipulator and a grasping system with a gripping element. For each functional block of the global framework, control execution strategies have been developed and tested in industrial environment. Specifically, localization is acquired by the use of synthetic landmarks, a motion planning and control strategy is employed for global navigation and a rack tracking motion control has been developed for moving inside the racks. To combine and execute all the elements without deadlocks a coordination framework is used as a global supervisor. The path planner for global navigation is based on the shortest distance between two points, and rack tracking is developed by applying the conventional Hough transform to the lidar data and using the output in a nonlinear controller, while the motion planner for manipulation is based on linear trajectories. The framework for supervisory control is based on discrete event systems topology and state machines corresponding to each element have been modelized using Petri nets. Finally, the framework has been tested for a complete picking task on the mobile manipulator to validate the selection of strategies and performance of each functional element. The successful demonstration has been concluded as a first step towards the evolution of autonomous palletization
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McCaffrey, Edward Jacob. "Kinematic Analysis and Evaluation of Wheelchair Mounted Robotic Arms." [Tampa, Fla.] : University of South Florida, 2003. http://purl.fcla.edu/fcla/etd/SFE0000195.
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Melingui, Achille. "Modeling and control of a class of mobile omnidrive : Continuum manipulator robots, case of study Robotino XT." Thesis, Lille 1, 2014. http://www.theses.fr/2014LIL10072/document.
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Cette thèse s'intéresse à la modélisation et la commande d'une classe des manipulateurs mobiles continus, a savoir le Robotino XT. Ce dernier comporte un manipulateur bionique continu montée sur une plate-forme mobile omnidirectionnel appelée Robotino. Premièrement, en utilisant la logique floue de type-2 et le champ de potentiel artificiel, nous avons proposé un contrôleur hybride intelligent pour la navigation de la plate-forme mobile. Ensuite, une architecture de commande adaptative neuronale a été proposée pour le contrôle de la partie manipulatrice. Cette architecture comporte deux sous-contrôleurs. Le premier sous-contrôleur, associé à la cinématique du manipulateur, et basé sur un système d'apprentissage supervisé distal contrôle les comportements stationnaires du manipulateur; tandis que le second, associé à la cinétique du manipulateur, et basé sur une commande adaptative permet de contrôler les comportements non stationnaires. Enfin, les deux contrôleurs sont coordonnés par un système neuronal pour contrôler le Robotino XT. Les performances de chaque contrôleur sont évaluées en réalisant des expériences en temps réelThis dissertation addresses the modeling and the control of a class of Continuum manipulators, namely the Robotino XT. It consists of a bionic continuum manipulator mounted on an omnidirectional mobile platform named Robotino. Thus, we first propose a hybrid intelligent controller based on Type-2 Fuzzy Logic (type-2 FL) and Artificial Potential Function (APF) concepts for the mobile platform navigation. Then, an adaptive neural network controller is proposed for the manipulator part. The latter includes two sub-controllers. The first one, associated with the arm kinematics, and based on Distal Supervised Learning (DSL) scheme, deals with stationary behaviors of the manipulator; while the second, associated with the arm kinetics, and based on adaptive control, is applied to the non stationary behaviors. Finally, the two controllers are coordinated by a neural network system to control the Robotino XT. The performance of each controller is assessed by conducting real-time experiments
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Konda, Sashi Kumar. "Design and testing of a marsupial/companion robot prototype for a powered wheelchair." [Tampa, Fla.] : University of South Florida, 2004. http://purl.fcla.edu/fcla/etd/SFE0000490.
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Wittenstein, Nikolaus Adrian. "Force Feedback for Reliable Robotic Door Opening." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/56584.
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Opening a door is still a hard problem in robotics. Many robotic manipulators use open-loop position control to open doors, which reduces reusability and reliability in the face of slight differences or sensor errors. Many others use force feedback or impedance control but skip past the problem of grabbing the handle, which could lead to failures due to sensor errors. This research assumes that perception is faulty, and uses joint-level force feedback to probe the location of the door and its handle before attempting to open it. The resulting control strategy is at least 33% faster than the open-loop control system it replaces, and had an 83% success rate during testing in place of the previous method's 60% success rate.Master of Science
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Farelo, Fabian. "Task oriented simulation and control of a wheelchair mounted robotic arm." [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0003294.
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LEFEVRE, ANNE. "Evita : un systeme de securite anti-collision pour un engin mobile utilisant une modelisation de l'environnement obtenue par apprentissage." Paris 6, 1987. http://www.theses.fr/1987PA066478.
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Presentation du systeme evita capable d'assister automatiquement l'operateur dans la prevention de toute forme de collision, en restant independant de la commande des engins. Le teleoperateur est averti de toute forme de danger par un signal d'alarme et peut connaitre l'etat du systeme a tout moment grace a la visualisation graphique couleur 3d
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Wei, Yan. "Planification et Suivi de Mouvement d’un Système de Manipulateur Mobile non-holonome à deux bras." Thesis, Ecole centrale de Lille, 2018. http://www.theses.fr/2018ECLI0004/document.
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Cette thèse se situe dans la planification et le suivi de mouvement d’un humanoïde mobile à deux bras. Premièrement, MDH est utilisé pour la modélisation cinématique. Afin de surmonter les insuffisances de la méthode d’Euler-Lagrange qui nécessitent des calculs d’énergie et ses dérivées partielles, la méthode de Kane est utilisée. En plus, la stabilité physique est analysée et un contrôleur est conçu. Deuxièmement, un algorithme avancée MaxiMin NSGA-II est proposée pour concevoir l’orientation et la position optimales de la plate-forme mobile (PB) et la configuration optimale du manipulateur supérieur (MS) étant donnée uniquement la pose initiale et les positions et orientations souhaitées des EEs. Un algorithme à connexion directe combinant BiRRT et la gradient-descente est conçu pour réaliser la transition de la pose initiale à la pose optimale, et une méthode d'optimisation géométrique est conçue pour optimiser et cohérer le chemin. En outre, les motions en avant sont obtenues en attribuant des orientations pour MB indiquant ainsi l'intention du robot. Afin de résoudre le problème d'échec de l’algorithme hors ligne, un algorithme en ligne est proposé en estimant les motions des obstacles dynamiques. De plus, afin d'optimiser les via-poses, un algorithme basé sur les via-points des EEs et MOGA est proposé en optimisant quatre fonctions objectives. Enfin, le problème de suivi de motion est étudié étant donné les motions des EEs dans l'espace de tâche. Au lieu de contrôler la motion absolue, deux motions relatives sont introduites pour réaliser la coordination et la coopération entre MB et MS. De plus, une technique mWLN est proposée pour éviter les limites des jointsThis thesis focuses on the motion planning and tracking of a dual-arm mobile humanoid. First, MDH is used for kinematic modeling. The co-simulation via Simulink-Adams on prototype is realized to validate the effectiveness of RBFNN controller. In order to overcome the shortcomings of Euler-Lagrange’s formulations that require calculating energy and energy derivatives, Kane’s method is used. In addition, physical stability is analyzed based on Kane’s method and a controller is designed using back-stepping technique. Secondly, an improved MaxiMin NSGA-II is proposed to design the mobile base’s (MB) optimal position-orientation and the upper manipulator’s (UM) optimal configuration given only the initial pose and end-effectors’ (EEs) desired positions-orientations. A direct connect algorithm combining BiRRT and gradient-descent is designed to plan the transition from initial pose to optimal pose, and a geometric optimization method is designed to optimize and cohere the path. In addition, forward motions are obtained by assigning orientations for MB thus indicating robot’s intention. In order to solve the failure problem of offline algorithm, an online algorithm is proposed while estimating dynamic obstacles’ motions. In addition, in order to optimize via-poses, an algorithm based on EEs’ via-points and MOGA is proposed by optimizing four via-pose-based objective functions. Finally, the motion tracking problem is studied given EEs’ motions in the task space. Instead of controlling the absolute motion, two relative motions are introduced to realize the coordination and cooperation between MB and UM. In addition, an modulated WLN technique is proposed to avoid joints’ limits
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Šustek, David. "Konstrukce jednokolového mobilního robotu se schopností stání na místě." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417725.
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The master thesis deals with the issue of a single-wheeled robot, especially its construction and movement in more difficult terrain with the possibility of collecting samples. A variant of the robot balanced by a pair of gyroscopes was chosen as the most suitable construction. The robot is able to move in a space with an inclination of up to 24° and is equipped with its own manipulator design.
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Skumsnes, Bjørn Heber. "Teleoperation of Mobile Robot Manipulators." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for teknisk kybernetikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18438.
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With ever cheaper and more versatile robots, the use of robotic systems in creases rapidly. Although robots are becoming more intelligent, the cognitive capabilities of humans can still not be matched. By combining the intelligence of a human operator with the strength, endurance and size of a robot, in addition to separating the robot and operator to avoid danger to the operator, the applications are innumerable. The use of an operator to remotely control a robot is often referred to as teleoperation.In a teleoperation system it is important to present the state of the robot and the remote environment with high accuracy and in a comprehensible way. With a large number of sensor data, a solution is to enhance the feeling of telepresence or transparency of the system. That is, making the human operator feel like he or she is interacting directly with the manipulated environment. This could be achieved by using a haptic joystick, which is able to generate force feedback to the operator, to present information about the slave robot. Examples of such informations are the distance to an obstacle or deviation from a desired movement. Such a system is often called a bilateral teleoperation system, where the stability is especially sensitive to transmission delay. This time-delay is often introduced by the communication network between the human operator and remote robot.This thesis presents a control architecture for interpreting a change in the joystick position to a desired end-effector velocity for a mobile manipulator. In addition to calculating the velocity, the controller is designed to comply with the joint limits, optimize the manipulability and handle time-varying transmission delay. A force, that depends on the deviation between the desired and measured end-effector position, is sent back to the human operator, as well as a visual feedback. To increase the precision of the end-effector movement the position of the movable robot base is fixed when the manipulability is above a given threshold, and moves only to increase the workspace of the robot. The designed system is implemented using Robot Operating System (ROS) and tested on a virtual mobile manipulator. The virtual robot is based on a model of a Schunk LWA3 7-DOF manipulator, mounted on a Seekur Jr. wheeled mobile base.Several experiments prove that the system with the proposed control architecture is stable when under influence of constant, as well as variable time-delay. Any standard deviation between the measured and desired end-effector position is eliminated, and the trajectory of the end-effector is almost identical the desired, though delayed when affected by communication delay. Neither the force feedback nor end-effector position show indications of dramatic change at the transition between fixed and moving robot base. Simulations with human operators show that they are able to move the end-effector of a virtual mobile manipulator from an initial position to a predefined goal, with the use of a Phantom Omni, haptic joystick.
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Pitts, David Thomas. "Dynamic analysis of mobile manipulators." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0007/MQ45621.pdf.
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Allouche, Benyamine. "Modélisation et commande des robots : nouvelles approches basées sur les modèles Takagi-Sugeno." Thesis, Valenciennes, 2016. http://www.theses.fr/2016VALE0021/document.
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Chaque année, plus de 5 millions de personne à travers le monde deviennent hémiplégiques suite à un accident vasculaire cérébral. Ce soudain déficit neurologique conduit bien souvent à une perte partielle ou totale de la station debout et/ou à la perte de la capacité de déambulation. Dans l’optique de proposer de nouvelles solutions d’assistance situées entre le fauteuil roulant et le déambulateur, cette thèse s’inscrit dans le cadre du projet ANR TECSAN VHIPOD « véhicule individuel de transport en station debout auto-équilibrée pour personnes handicapées avec aide à la verticalisation ». Dans ce contexte, ces travaux de recherche apportent des éléments de réponse à deux problématiques fondamentales du projet : l’assistance au passage assis-debout (PAD) des personnes hémiplégiques et le déplacement à l’aide d’un véhicule auto-équilibré à deux roues. Ces problématiques sont abordées du point de vue de la robotique avec comme question centrale : peut-on utiliser l’approche Takagi-Sugeno (TS) pour la synthèse d’une commande ? Dans un premier temps, la problématique de mobilité des personnes handicapées a été traitée sur la base d’une solution de type gyropode. Des lois de commande basées sur les approches TS standard et descripteur ont été proposées afin d’étudier la stabilisation des gyropodes dans des situations particulières telles que le déplacement sur un terrain en pente ou le franchissement de petites marches. Les résultats obtenus ont non seulement permis d’aboutir à un concept potentiellement capable de franchir des obstacles, mais ils ont également permis de souligner la principale difficulté liée à l’applicabilité de l’approche TS en raison du conservatisme des conditions LMIs (inégalités matricielles linéaires). Dans un second temps, un banc d’assistance au PAD à architecture parallèle a été conçu. Ce type de manipulateur constitué de multiples boucles cinématiques présente un modèle dynamique très complexe (habituellement donné sous forme d’équations différentielles ordinaires). L’application de lois de commande basées sur l’approche TS est souvent vouée à l’échec compte tenu du grand nombre de non-linéarités dans le modèle. Afin de remédier à ce problème, une nouvelle approche de modélisation a été proposée. À partir d’un jeu de coordonnées bien particulier, le principe des puissances virtuelles est utilisé pour générer un modèle dynamique sous forme d’équations algébro-différentielles (DAEs). Cette approche permet d’aboutir à un modèle quasi-LPV où les seuls paramètres variants représentent les multiplicateurs de Lagrange issus de la modélisation DAE. Les résultats obtenus ont été validés en simulation sur un robot parallèle à 2 degrés de liberté (ddl) puis sur un robot parallèle à 3 ddl développé pour l’assistance au PADEvery year more than 5 million people worldwide become hemiplegic as a direct consequence of stroke. This neurological deficiency, often leads to a partial or a total loss of standing up abilities and /or ambulation skills. In order to propose new supporting solutions lying between the wheelchair and the walker, this thesis comes within the ANR TECSAN project named VHIPOD “self-balanced transporter for disabled persons with sit-to-stand function”. In this context, this research provides some answers for two key issues of the project : the sit-to-stand assistance (STS) of hemiplegic people and their mobility through a two wheeled self-balanced solution. These issues are addressed from a robotic point of view while focusing on a key question : are we able to extend the use of Takagi-Sugeno approach (TS) to the control of complex systems ? Firstly, the issue of mobility of disabled persons was treated on the basis of a self-balanced solution. Control laws based on the standard and descriptor TS approaches have been proposed for the stabilization of gyropod in particular situations such as moving along a slope or crossing small steps. The results have led to the design a two-wheeled transporter which is potentially able to deal with the steps. On the other hand, these results have also highlighted the main challenge related to the use of TS approach such as the conservatisms of the LMIs constraints (Linear Matrix Inequalities). In a second time, a test bench for the STS assistance based on parallel kinematic manipulator (PKM) was designed. This kind of manipulator characterized by several closed kinematic chains often presents a complex dynamical model (given as a set of ordinary differential equations, ODEs). The application of control laws based on the TS approach is often doomed to failure given the large number of non-linear terms in the model. To overcome this problem, a new modeling approach was proposed. From a particular set of coordinates, the principle of virtual power was used to generate a dynamical model based on the differential algebraic equations (DAEs). This approach leads to a quasi-LPV model where the only varying parameters are the Lagrange multipliers derived from the constraint equations of the DAE model. The results were validated on simulation through a 2-DOF (degrees of freedom) parallel robot (Biglide) and a 3-DOF manipulator (Triglide) designed for the STS assistance
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Mashali, Mustafa. "Kinematic Control of Redundant Mobile Manipulators." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5989.
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A mobile manipulator is a robotic arm mounted on a robotic mobile platform. In such a system, the degrees of freedom of the mobile platform are combined with that of the manipulator. As a result, the workspace of the manipulator is substantially extended. A mobile manipulator has two trajectories: the end-effector trajectory and the mobile platform trajectory. Typically, the mobile platform trajectory is not defined and is determined through inverse kinematics. But in some applications it is important to follow a specified mobile platform trajectory. The main focus of this work is to determine the inverse kinematics of a mobile manipulator to follow the specified end-effector and mobile platform trajectories, especially when both trajectories cannot be exactly followed simultaneously due to physical limitations. Two new control algorithms are developed to solve this problem.
In the first control algorithm, three joint-dependent control variables (spherical coordinates D, α and β) are introduced to define the mobile platform trajectory in relation to the end-effector trajectory and vice versa. This allows direct control of the mobile platform motion relative to the end-effector. Singularity-robust and task-priority inverse kinematics with gradient projection method is used to find best possible least-square solutions for the dual-trajectory tracking while maximizing the whole system manipulability. MATLAB Simulated Planar Mobile Manipulation is used to test and optimize the proposed control system. The results demonstrate the effectiveness of the control system in following the two trajectories as much as possible while optimizing the whole system manipulability measure.
The second new inverse kinematics algorithm is introduced when the mobile platform motion is restricted to stay on a specified virtual or physical track. The control scheme allows xii the mobile manipulator to follow the desired end-effector trajectory while keeping the mobile platform on a specified track. The mobile platform is moved along a track to position the arm at a pose that facilitates the end-effector task. The translation of the redundant mobile manipulator over the mobile platform track is determined by combining the mobility of the platform and the manipulation of the redundant arm in a single control system. The mobile platform is allowed to move forward and backward with different velocities along its track to enable the end-effector in following its trajectory. MATLAB simulated 5 DoF redundant planar mobile manipulator is used to implement and test the proposed control algorithm. The results demonstrate the effectiveness of the control system in adjusting the mobile platform translations along its track to allow the arm to follow its own trajectory with high manipulability. Both control algorithms are implemented on MATLAB simulated wheelchair mounted robotic arm system (WMRA-II). These control algorithms are also implemented on real the WMRA-II hardware.
In order to facilitate mobile manipulation, a control motion scheme is proposed to detect and correct the mobile platform pose estimation error using computer vision algorithm. The Iterative Closest Point (ICP) algorithm is used to register two consecutive Microsoft Kinect camera views. Two local transformation matrices i. e., Encoder and ICP transformation matrices, are fused using Extended Kalman Filter (EKF) to filter the encoder pose estimation error. VICON motion analysis system is used to capture the ground truth of the mobile platform. Real time implementation results show significant improvement in platform pose estimation. A real time application involving obstacle avoidance is used to test the proposed updated motion control system.
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Lopez, Damian Efrain. "Planification de saisie pour la manipulation d'objets par un robot autonome." Phd thesis, INSA de Toulouse, 2006. http://tel.archives-ouvertes.fr/tel-00134780.
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L'évolution autonome d'un robot dans un environnement évolutif nécessite qu'il soit doté de capacités de perception, d'action et de décision suffisantes pour réaliser la tâche assignée. Une tâche essentielle en robotique est la manipulation d'objets et d'outils. Elle intervient non seulement pour un robot seul mais également dans des situations d'interaction avec un humain ou un autre robot quand il s'agit d'échanger des objets ou de les manipuler conjointement. Cette thèse porte sur la planification de tâches de manipulation d'objets pour un robot autonome dans un environnement humain. Une architecture logicielle susceptible de résoudre ce type de problèmes au niveau géométrique est proposée. Généralement, une tâche de manipulation commence par une opération de saisie dont la qualité conditionne fortement la réussite de la tâche et pour laquelle nous proposons un planificateur basé sur les propriétés inertielles de l'objet et une décomposition en éléments quasi-convexes tout en prenant en compte les contraintes imposées par le système mobile complet dans un environnement donné. Les résultats sont validés en simulation et sur le robot sur la base d'une extension des outils de planification développés au LAAS-CNRS. Le modèle géométrique 3D de l'objet peut être connu a priori ou bien acquis en ligne. Des expérimentations menées sur un robot manipulateur mobile équipé d'une pince à trois points de contacts, de capteurs de force et d'une paire de caméras stéréoscopiques ont montré la validité de l'approche.
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Lopez, Damian Efrain. "Grasp planning for object manipulation by an autonomous robot." Toulouse, INSA, 2006. http://www.theses.fr/2006ISAT0009.
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L'évolution autonome d'un robot dans un environnement évolutif nécessite qu'il soit doté de capacités de perception, d'action et de décision suffisantes pour réaliser la tâche assignée. Une tâche essentielle en robotique est la manipulation d'objets et d'outils. Elle intervient non seulement pour un robot seul mais également dans des situations d'interaction avec un humain ou un autre robot quand il s'agit d'échanger des objets ou de les manipuler conjointement. Cette thèse porte sur la planification de tâches de manipulation d'objets pour un robot autonome dans un environnement humain. Une architecture logicielle susceptible de résoudre ce type de problèmes au niveau géométrique est proposée. Généralement, une tâche de manipulation commence par une opération de saisie dont la qualité conditionne fortement la réussite de la tâche et pour laquelle nous proposons un planificateur basé sur les propriétés inertielles de l'objet et une décomposition en éléments quasi-convexes tout en prenant en compte les contraintes imposées par le système mobile complet dans un environnement donné. Les résultats sont validés en simulation et sur le robot sur la base d'une extension des outils de planification développés au LAAS-CNRS. Le modèle géométrique 3D de l'objet peut être connu a priori ou bien acquis en ligne. Des expérimentations menées sur un robot manipulateur mobile équipé d'une pince à trois points de contacts, de capteurs de force et d'une paire de caméras stéréoscopiques ont montré la validité de l'approcheThe autonomous robot performance in a dynamic environment requires advanced perception, action and decision capabilities. Interaction with the environment plays a key role for a robot and it is well illustrated in object and/or tool manipulation. Interaction with humans or others robots can consist in object exchanges. This thesis deals with object manipulation planning by an autonomous robot in human environments. A software architecture is proposed that is capable to solve such problems at the geometrical level. In general, a manipulation task starts by a grasp operation which quality influences strongly the success of the overall task. We propose a planner based on object inertial properties and an approximate convex decomposition. The whole mobile system taken into account in the planning process. The planner has been completely implemented as an extension of the planning tools developed at LAAS-CNRS. Its results have been tested in simulation and on a robotic platform. Object models may be known a priori or acquired on-line. Experiments have been carried out with a mobile manipulator equipped with a three fingers gripper, a wrist force sensor and a stereo camera system in order to validate the approach
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Lin, Sheng. "Robust and intelligent control of mobile manipulators." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/NQ63711.pdf.
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Hootsmans, Norbert A. M. (Norbert Antony Murray). "The motion control manipulators on mobile vehicles." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/13064.
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Issartel, Paul. "Nouvelles approches pour la portabilité, la non-intrusivité et l'accessibilité des interfaces de manipulation 3D." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS077/document.
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Ce travail porte sur l'interaction avec des objets virtuels 3D, et plus particulièrement leur manipulation : sélection, translation et rotation. Les plates-formes les plus utilisées aujourd'hui pour ce type de tâche (ordinateur personnel et appareil mobile) ont été conçues avant tout pour l'interaction 2D, et sont donc peu adaptées à la manipulation 3D. Il existe pourtant une alternative plus efficace : les systèmes de réalité virtuelle. Cependant, les systèmes actuellement disponibles restent trop souvent encombrants, onéreux et/ou intrusifs pour l'utilisateur, et demeurent sous-utilisés pour cette raison. Dans cette thèse, nous étudions de nouvelles approches pour rendre ce type d'interaction moins contraignant, tout en conservant une bonne efficacité de manipulation. Les principaux axes explorés sont la portabilité de l'interface, sa non-intrusivité, et l'utilisation de dispositifs plus largement accessibles au grand public. Nous proposons une première approche visant à répondre simultanément aux critères ci-dessus. Celle-ci consiste à combiner un appareil mobile classique (pour sa portabilité et son accessibilité) avec des objets tangibles passifs (pour une manipulation 3D efficace et non-intrusive). Cette approche présente toutefois encore certaines contraintes : elle est constituée de multiples éléments qui doivent être transportés ensemble, et elle ne se prête pas à l'utilisation de dispositifs à retour de force. Nous introduisons donc dans un deuxième temps une nouvelle technique, appelée «découplage». Basée sur le principe du «pseudo-haptique», celle-ci permet à l'utilisateur de percevoir des forces virtuelles à travers la seule modalité visuelle. Il devient alors possible de se passer complètement de dispositifs haptiques, et des contraintes qui leur sont associées. Nous nous intéressons ensuite à une approche entièrement intégrée, visant à améliorer la portabilité par-rapport à une interface faite d'éléments séparés. Cette approche consiste à se servir des déplacements de l'appareil mobile lui-même dans l'espace réel pour manipuler des objets 3D affichés sur son propre écran. Cette configuration «localement couplée» présente cependant plusieurs particularités qui rendent la manipulation plus complexe. Nous examinons donc en détail les différentes questions que pose cette configuration spécifique. Nous proposons enfin une dernière approche, appelée le «volume tangible», visant à retrouver la simplicité de la manipulation par objets tangibles mais dans un unique dispositif intégré. Nous décrivons une première implémentation de ce dispositif, et discutons de sa faisabilité technique ainsi que de l'accessibilité de cette approche à court et moyen termeThis work focuses on 3D interaction with virtual objects, more specifically on 3D manipulation: selection, translation, and rotation. The most commonly-used interaction platforms (personal computer, mobile device) were designed for 2D interaction and thus are not well suited to 3D manipulation. There is a more efficient alternative for this task: virtual reality. However, current virtual reality systems are too often bulky, expensive and/or intrusive to the user, and for these reasons remain underused. In this thesis, we propose and study new solutions to make this form of interaction more convenient without reducing its effectiveness. The main objectives we aim for are interface portability, non-intrusiveness, and the use of readily-available hardware. We propose a first approach to simultaneously meet the above criteria. It consists in combining a standard mobile device (for its portability and widespread availability) with passive tangible objects (for efficient 3D manipulation in a non-intrusive manner). Yet, this approach still has drawbacks: it is made of multiple parts that must always be carried together, and is not suitable for adding force-feedback using haptic devices. We thus introduce a new technique, called “decoupling”, that allows the user to perceive virtual forces through the visual modality alone. Based on the concept of “pseudo-haptics”, this technique makes it possible to provide force feedback without the constraints associated with actual haptic devices. We then study a different approach intended to be fully integrated, enhancing the portability aspect compared to an interface made of multiple parts. This approach consists in using the motion of the mobile device itself to manipulate 3D objects displayed on its own screen. However, this “locally-coupled” configuration presents several unique characteristics that make manipulation more complex. We thus investigate the questions raised by this specific configuration. Finally, we introduce a last approach, called the “tangible volume”, aimed at regaining the same directness of manipulation as with tangible objects but in a single integrated device. We describe an early implementation of such a device, and discuss its technical feasibility as well as its potential accessibility to end users in the short and medium term
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Akbari, Aliakbar. "Combining task and motion planning for mobile manipulators." Doctoral thesis, Universitat Politècnica de Catalunya, 2020. http://hdl.handle.net/10803/668420.
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This thesis addresses the combination of task and motion planning which deals with different types of robotic manipulation problems. Manipulation problems are referred to as mobile manipulation, collaborative multiple mobile robots tasks, and even higher dimensional tasks (like bi-manual robots or mobile manipulators). Task and motion planning problems needs to obtain a geometrically feasible manipulation plan through symbolic and geometric search space. The combination of task and motion planning levels has emerged as a challenging issue as the failure leads robots to dead-end tasks due to geometric constraints.
In addition, task planning is combined with physics-based motion planning and information to cope with manipulation tasks in which interactions between robots and objects are required, or also a low-cost feasible plan in terms of power is looked for. Moreover, combining task and motion planning frameworks is enriched by introducing manipulation knowledge. It facilitates the planning process and aids to provide the way of executing symbolic actions.
Combining task and motion planning can be considered under uncertain information and with human-interaction. Uncertainty can be viewed in the initial state of the robot world or the result of symbolic actions. To deal with such issues, contingent-based task and motion planning is proposed using a perception system and human knowledge. Also, robots can ask human for those tasks which are difficult or infeasible for the purpose of collaboration.
An implementation framework to combine different types of task and motion planning is presented. All the required modules and tools are also illustrated. As some task planning algorithms are implemented in Prolog or C++ languages and our geometric reasoner is developed in C++, the flow of information between different languages is explained.Aquesta tesis es centra en les eines de planificació combinada a nivell de tasca i a nivell de moviments per abordar diferents problemes de manipulació robòtica. Els problemes considerats són de navegació de robots mòbil enmig de obstacles no fixes, tasques de manipulació cooperativa entre varis robots mòbils, i tasques de manipulació de dimensió més elevada com les portades a terme amb robots bi-braç o manipuladors mòbils. La planificació combinada de tasques i de moviments ha de cercar un pla de manipulació que sigui geomètricament realitzable, a través de d'un espai de cerca simbòlic i geomètric. La combinació dels nivells de planificació de tasca i de moviments ha sorgit com un repte ja que les fallades degudes a les restriccions geomètriques poden portar a tasques sense solució. Addicionalment, la planificació a nivell de tasca es combina amb informació de la física de l'entorn i amb mètodes de planificació basats en la física, per abordar tasques de manipulació en les que la interacció entre el robot i els objectes és necessària, o també si es busca un pla realitzable i amb un baix cost en termes de potència. A més, el marc proposat per al combinació de la planificació a nivell de tasca i a nivell de moviments es millora mitjançant l'ús de coneixement, que facilita el procés de planificació i ajuda a trobar la forma d'executar accions simbòliques. La combinació de nivells de planificació també es pot considerar en casos d'informació incompleta i en la interacció humà-robot. La incertesa es considera en l'estat inicial i en el resultat de les accions simbòliques. Per abordar aquest problema, es proposa la planificació basada en contingències usant un sistema de percepció i el coneixement de l'operari humà. Igualment, els robots poden demanar col·laboració a l'operari humà per a que realitzi aquelles accions que són difícils o no realitzables pel robot. Es presenta també un marc d'implementació per a la combinació de nivells de planificació usant diferents mètodes, incloent tots els mòduls i eines necessàries. Com que alguns algorismes estan implementats en Prolog i d'altres en C++, i el mòdul de raonament geomètric proposat està desenvolupat en C++, es detalla el flux d'informació entre diferents llenguatges.
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Wang, Yu. "Cooperative Transportation of Mobile Manipulators With Collision Avoidance." Thesis, KTH, Reglerteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231841.
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In this work, we propose two Nonlinear Model Predictive Control(NMPC) schemes, Decentralized Nonlinear Model Predictive Control(DNMPC) and Centralized Nonlinear Model Predictive Control (CNMPC),for cooperative transportation of an object, which is rigidlygrasped by N agents. We use feedback linearization and model reductionto reduce overall complexity of the model. We also providea mathematical proof for feasibility and convergence of the schemes.Finally, we use simulations and experiments to validate the robustnessand efficiency of the proposed schemes.I det här arbetet föreslår vi två system för icke-linjär model predictivecontrol (NMPC), Decentraliserad icke-linjär MPC (DNMPC) och centraliseradicke-linjär MPC (CNMPC), för kooperativ transport av ettobjekt, som är fast greppad av N agenter . Vi använder feedbacklinjäriseringoch modellreduktion för att minska modellens övergripandekomplexitet. Vi tillhandahåller också ett matematiskt bevis för genomförbarhetoch konvergens av systemen. Slutligen använder vi simuleringaroch experiment för att validera de föreslagna systemens robusthetoch effektivitet.
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Schuster, Micha. "Entwicklung und Modellierung einer vollaktuierten Drohne." Master's thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-236790.
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Diese Diplomarbeit beschäftigt sich mit der geometrischen Auslegung und Regelung einer vollaktuierten Drohne, die als fliegende Arbeitsplattform für einen Manipulator dienen soll. Dabei werden ausgehend von der geometrischen Beschreibung einer allgemeinen, symmetrischen Drohne mit sechs Rotoren Methoden entwickelt, die den anforderungsbezogenen Entwurf der Geometrie einer vollaktuierten Drohne ermöglichen. Darüber hinaus werden prinzipielle Einflussmechanismen einzelner Geometrieparameter auf die durch die Drohne erzeugbaren Kräfte und Momente aufgezeigt. Zur Charakterisierung des Raums aller erzeugbaren Lasten wird dieser auf sogenannte Stützvektoren reduziert. Als Stützvektoren dienen dabei die für den Schwebeflug nötige Schubkraft, die garantierte Mindestkraft in horizontaler Richtung und das garantierte Mindestmoment um eine beliebige Achse, zu deren Berechnung zusätzlich analytische Formeln hergeleitet werden. Aufbauend auf die Beschreibung durch Stützvektoren wird die Formuliernung von Metriken vorgestellt, die die Bewertung einer Drohnengeometrie durch eine einzige skalare Maßzahl ermöglichen, wodurch die je nach Anwendung optimale Drohnengeometrie ermittelt werden kann. Zur Regelung des Systems aus Drohne und Manipulator wurde ein Regelungskonzept entwickelt, welches durch eine Entkopplung der Bewegungsgleichungen eine virtuelle Verschiebung des Schwerpunkts in das Drohnenzentrum realisiert und so eine präzise Regelung unabhängig von der tatsächlichen Schwerpunktlage ermöglichtThis thesis’ subject is the geometrical design and control of a fully actuated drone, intended to be used as a flying operating-platform for a manipulator. Starting with the general geometrical description of a symmetric drone with six rotors, methods for the application specific design of a fully actuated drone are developed. Furthermore general influencing principles of geometric parameters on the forces and torques that can be generated by the drone, are pointed out. To characterize the drone's wrench-space, it is reduced to so called support vectors, which are given by the hovering thrust, the minimum guaranteed force in a horizontal direction and the minimum guaranteed torque in any direction. Additionally, analytic formulas are derived for the mentioned support vectors. Based on the description by the support vectors, a formulation of metrics is introduced, to enable the assessment of a specific drone geometry by a single scalar measure, to determine the ideal drone geometry for a specific application. Targeting the issue of controlling the flight system, consisting of the drone and the manipulator, a concept is developed that realizes a virtual dissplacement of the center of mass by decoupling the equations of motion and therby facilitates a precise control, independent of the actual location of the system's center of mass
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Lang, Haoxiang. "Control of mobile manipulation with networked sensing." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/43277.
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This thesis addresses the manipulation control of a mobile robot with the support of a sensor network, for carrying out dynamically challenging tasks. Such tasks are defined as those where the robot is required to first identify objects, approach and grasp the needed objects, and transport them to goal locations in an environment that is dynamic, unstructured and only partially known. In the present work, a robotic system with these capabilities is developed and implemented for use in tasks of search and rescue, and homecare robotics. To this end, this thesis makes significant original contributions in developing a scheme of adaptive nonlinear model predictive control (ANMPC) and a sensor network with dynamic clustering capability for mobile manipulation under challenging conditions.
Two object tracking algorithms for color tracking and feature tracking are developed for object identification and tracking. A system that uses Q-learning is developed for mobile robot navigation, which allows the robot to learn and operate in an unknown and unstructured dynamic environment.
A traditional approach of image-based visual servo control is developed and demonstrated. The scheme of ANMPC is developed, which incorporates a multi-input multi-output (MIMO) control system that can accommodate constraints, including environmental constraints and physical constraints of the robots. In implementing ANPC scheme, the nonlinear and time-variant model is linearized on line with respect to the current position of the image feature and robot joints, using an adaptive approach. The corresponding control architecture predicts the system outputs and generates optimized control actions according to a cost function.
In order to extend the mobile manipulation system to a wider workspace such as that found in cities and home scenarios, a sensor network is designed and developed employing PFSA (Probabilistic Finite State Automata). The developed PFSA is utilized in both modeling the sensor data and organizing and representing the sensor network. An application of object identification and tracking is presented; and a heterogeneous sensor network is developed along with a simulation platform in MATLAB. A self-organized and clustered sensor network, which is based on PFSA, is demonstrated. In conclusion, directions for further research and development are indicated.
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Zhu, Charlotte. "Point cloud segmentation for mobile robot manipulation." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/106400.
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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2016.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 47-48).
In this thesis, we develop a system for estimating a belief state for a scene over multiple observations of the scene. Given as input a sequence of observed RGB-D point clouds of a scene, a list of known objects in the scene and their pose distributions as a prior, and a black-box object detector, our system outputs a belief state of what is believed to be in the scene. This belief state consists of the states of known objects, walls, the floor, and "stuff" in the scene based on the observed point clouds. The system first segments the observed point clouds and then incrementally updates the belief state with each segmented point cloud.
by Charlotte Zhu.
M. Eng.
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Ryu, Ji Chul. "Integrated planning and control of mobile manipulators and robots using differential flatness." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 230 p, 2009. http://proquest.umi.com/pqdweb?did=1891582841&sid=1&Fmt=2&clientId=8331&RQT=309&VName=PQD.
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Mohy, El Dine Kamal. "Control of robotic mobile manipulators : application to civil engineering." Thesis, Université Clermont Auvergne (2017-2020), 2019. http://www.theses.fr/2019CLFAC015/document.
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Malgré le progrès de l'automatisation industrielle, les solutions robotiques ne sont pas encore couramment utilisées dans le secteur du génie civil. Plus spécifiquement, les tâches de ponçage, telles que le désamiantage, sont toujours effectuées par des opérateurs humains utilisant des outils électriques et hydrauliques classiques. Cependant, avec la diminution du coût relatif des machines par rapport au travail humain et les réglementations sanitaires strictes applicables à des travaux aussi risqués, les robots deviennent progressivement des alternatives crédibles pour automatiser ces tâches et remplacer les humains.Dans cette thèse, des nouvelles approches de contrôle de ponçage de surface sont élaborées. Le premier contrôleur est un contrôleur hybride position-force avec poignet conforme. Il est composé de 3 boucles de commande, force, position et admittance. La commutation entre les commandes pourrait créer des discontinuités, ce qui a été résolu en proposant une commande de transition. Dans ce contrôleur, la force de choc est réduite par la commande de transition proposée entre les modes espace libre et contact. Le second contrôleur est basé sur un modèle de ponçage développé et un contrôleur hybride adaptatif position-vitesse-force. Les contrôleurs sont validés expérimentalement sur un bras robotique à 7 degrés de liberté équipé d'une caméra et d'un capteur de force-couple. Les résultats expérimentaux montrent de bonnes performances et les contrôleurs sont prometteurs. De plus, une nouvelle approche pour contrôler la stabilité des manipulateurs mobiles en temps réel est présentée. Le contrôleur est basé sur le « zero moment point », il a été testé dans des simulations et il a été capable de maintenir activement la stabilité de basculement du manipulateur mobile tout en se déplaçant. En outre, les incertitudes liées à la modélisation et aux capteurs sont prises en compte dans les contrôleurs mentionnés où des observateurs sont proposés.Les détails du développement et de l'évaluation des différents contrôleurs proposés sont présentés, leurs mérites et leurs limites sont discutés et des travaux futurs sont suggérésDespite the advancements in industrial automation, robotic solutions are not yet commonly used in the civil engineering sector. More specifically, grinding tasks such as asbestos removal, are still performed by human operators using conventional electrical and hydraulic tools. However, with the decrease in the relative cost of machinery with respect to human labor and with the strict health regulations on such risky jobs, robots are progressively becoming credible alternatives to automate these tasks and replace humans.In this thesis, novel surface grinding control approaches are elaborated. The first controller is based on hybrid position-force controller with compliant wrist and a smooth switching strategy. In this controller, the impact force is reduced by the proposed smooth switching between free space and contact modes. The second controller is based on a developed grinding model and an adaptive hybrid position-velocity-force controller. The controllers are validated experimentally on a 7-degrees-of-freedom robotic arm equipped with a camera and a force-torque sensor. The experimental results show good performances and the controllers are promising. Additionally, a new approach for controlling the stability of mobile manipulators in real time is presented. The controller is based on zero moment point, it is tested in simulations and it was able to actively maintain the tip-over stability of the mobile manipulator while moving. Moreover, the modeling and sensors uncertainties are taken into account in the mentioned controllers where observers are proposed. The details of the development and evaluation of the several proposed controllers are presented, their merits and limitations are discussed and future works are suggested
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Chiaravalli, Davide <1991>. "Haptic Control of Mobile Manipulators Interacting with the Environment." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amsdottorato.unibo.it/8797/1/chiaravalli_davide_tesi.pdf.
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In the modern society the haptic control of robotic manipulators plays a central role in many industrial fields because of the improvement of human capabilities and the
prevention of many hazards that it can provide. Many different studies are focusing on the improvement of the operator experience, aiming at simplifying the control interface and increasing the level of intuitiveness that the system can provide to a non-trained user. This work focus on the control of mobile manipulator platforms, that are gaining popularity in the industrial world because of their capability to merge the manipulation of the environment with a potentially infinite workspace.
In particular three different aspects concerning the haptic shared control of mobile manipulators will be studied. Initially the manipulation of liquid container is analyzed and a new feed-forward filtering technique able to guarantee a slosh free motion without any a priori knowledge of the imposed trajectory is proposed. Then the trajectory planning for a mobile base in an unstructured environment is considered. A new planner based on the properties of B-spline curves is studied and tested for both the haptic and the autonomous case. Eventually the control of a mobile
manipulator by means of a single commercial haptic device is addressed. A new mapping technique able to provide an intuitive interface for the control for the human operator is presented. The effectiveness of the proposed works is confirmed viaseveral experimental tests.
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Wasik, Zbigniew. "A behavior-based control system for mobile manipulation /." Örebro : Örebro universitetsbibliotek, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-108.
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Ezequiel, Carlos Favis. "Real-Time Map Manipulation for Mobile Robot Navigation." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4481.
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Mobile robots are gaining increased autonomy due to advances in sensor and computing technology. In their current form however, robots still lack algorithms for rapid perception of objects in a cluttered environment and can benefit from the assistance of a human operator. Further, fully autonomous systems will continue to be computationally expensive and costly for quite some time. Humans can visually assess objects and determine whether a certain path is traversable, but need not be involved in the low-level steering around any detected obstacles as is necessary in remote-controlled systems. If only used for rapid perception tasks, the operator could potentially assist several mobile robots performing various tasks such as exploration, surveillance, industrial work and search and rescue operations. There is a need to develop better human-robot interaction paradigms that would allow the human operator to effectively control and manage one or more mobile robots.
This paper proposes a method of enhancing user effectiveness in controlling multiple mobile robots through real-time map manipulation. An interface is created that would allow a human operator to add virtual obstacles to the map that represents areas that the robot should avoid. A video camera is connected to the robot that would allow a human user to view the robot's environment. The combination of real-time map editing and live video streaming enables the robot to take advantage of human vision, which is still more effective at general object identification than current computer vision technology. Experimental results show that the robot is able to plan a faster path around an obstacle when the user marks the obstacle on the map, as opposed to allowing the robot to navigate on its own around an unmapped obstacle. Tests conducted on multiple users suggest that the accuracy in placing obstacles on the map decreases with increasing distance of the viewing apparatus from the obstacle. Despite this, the user can take advantage of landmarks found in the video and in the map in order to determine an obstacle's position on the map.
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Mobley, Christopher James. "Multistage Localization for High Precision Mobile Manipulation Tasks." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/75237.
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This paper will present a multistage localization approach for an autonomous industrial mobile manipulator (AIMM). This approach allows tasks with an operational scope outside the range of the robot's manipulator to be completed without having to recalibrate the position of the end-effector each time the robot's mobile base moves to another position. This is achieved by localizing the AIMM within its area of operation (AO) using adaptive Monte Carlo localization (AMCL), which relies on the fused odometry and sensor messages published by the robot, as well as a 2-D map of the AO, which is generated using an optimization-based smoothing simultaneous localization and mapping (SLAM) technique. The robot navigates to a predefined start location in the map incorporating obstacle avoidance through the use of a technique called trajectory rollout. Once there, the robot uses its RGB-D sensor to localize an augmented reality (AR) tag in the map frame. Once localized, the identity and the 3-D position and orientation, collectively known as pose, of the tag are used to generate a list of initial feature points and their locations based on a priori knowledge. After the end-effector moves to the approximate location of a feature point provided by the AR tag localization, the feature point's location, as well as the end-effector's pose are refined to within a user specified tolerance through the use of a control loop, which utilizes images from a calibrated machine vision camera and a laser pointer, simulating stereo vision, to localize the feature point in 3-D space using computer vision techniques and basic geometry. This approach was implemented on two different ROS enabled robots, the Clearpath Robotics' Husky and the Fetch Robotics' Fetch, in order to show the utility of the multistage localization approach in executing two tasks which are prevalent in both manufacturing and construction: drilling and sealant application. The proposed approach was able to achieve an average accuracy of ± 1 mm in these operations, verifying its efficacy for tasks which have a larger operational scope than that of the range of the AIMM's manipulator and its robustness to general applications in manufacturing.Master of Science
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Chebab, Zine Elabidine. "Conception et commande collaborative de manipulateurs mobiles modulaires (C3M3)." Thesis, Université Clermont Auvergne (2017-2020), 2018. http://www.theses.fr/2018CLFAC070/document.
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Dans un contexte d’Industrie 4.0, on perçoit de nouveaux usages possibles des manipulateurs mobiles (MMs), des robots généralement obtenus par l’association d’un bras manipulateur et d’une plate-forme mobile. Ce travail de thèse se focalise sur la synthèse et la commande de nouveaux MMs coopératifs en définissant trois défis à relever. Le premier défi concerne l’élargissement des domaines d’utilisation des robots par la possibilité de leur utilisation coopérative. Nous définissons ainsi un système robotique modulaire basé sur l’utilisation d’entités robotiques appelés mono-robots (m-bots). Ceux-ci sont des MMs qui peuvent se réarranger sous forme de poly-robot (p-bot) pour réaliser une tâche en collaboration. Le deuxième défi se focalise sur la définition de l’architecture cinématique élémentaire de ces robots. Ainsi, nous proposons une démarche générique de synthèse structurale qui permet l’obtention de plusieurs architectures de m-bots respectant les cahiers des charges relatifs à la tâche en tant que m-bot, mais aussi en tant que p-bot pour un environnement considéré. Cette démarche est basée sur l’analyse structurale des MMs à l’aide des paramètres structuraux des mécanismes (connectivité, mobilité, redondance et hyperstatisme). Le troisième défi proposé est d’arriver à modéliser et contrôler les architectures de MMs synthétisées pour la tâche. Deux lois de commande (PID et hybride force-position) sont proposées pour la réalisation de la tâche considérée. Leur validation a été réalisée grâce à des simulations avancéesIn recent years, the concept of Industry 4.0 has led to new possibilities of use for mobile manipulators (MMs) that are generally made of a manipulator arm mounted on a mobile base. The current Ph.D. is focused on the synthesis and control of new cooperative MMs by defining three challenges. The first challenge concerns the widening of the fields of application of robots. Therefore, we define a modular robotic system based on the use of multiple MMs (mono robots or m-bots) that can be used as a global system (poly-robot or p-bot) for collaborative tasks. The second challenge concerns the definition of the kinematic structure of the MMs. We propose a new generic method of structural synthesis that allows to obtain multiple kinematic architectures for m-bots that respect the constraints imposed by the task and the workspace. This method is based on structural analysis of MMs by the evaluation of the structural parameters (connectivity, mobility, redundancy and overconstraint). The last challenge concerns the modelling and control of the new architectures for the new fields of application. Two control laws (PID control and hybrid force-position control) are proposed in order to realise the considered task. Their validation is done with advanced simulations
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Liu, Yu Gang. "Kinematics, dynamics and intelligent control for nonholonomic mobile modular manipulators." Thesis, University of Macau, 2006. http://umaclib3.umac.mo/record=b1636567.
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Pepe, Alberto <1984>. "Haptic Device Design and Teleoperation Control Algorithms for Mobile Manipulators." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amsdottorato.unibo.it/8704/1/Tesi%20dottorato%20Alberto%20Pepe.pdf.
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The increasing need of teleoperated robotic systems implies more and more often to use, as slave devices, mobile platforms (terrestrial, aerial or underwater) with integrated manipulation capabilities, provided e.g. by robotic arms with proper grasping/manipulation tools. Despite this, the research activity in teleoperation of robotic systems has mainly focused on the control of either fixed-base manipulators or mobile robots, non considering the integration of these two types of systems in a single device. Such a combined robotic devices are usually referred to as mobile manipulators: systems composed by both a robotic manipulator and a mobile platform (on which the arm is mounted) whose purpose is to enlarge the manipulator’s workspace. The combination of a mobile platform and a serial manipulator creates redundancy: a particular point in the space can be reached by moving the manipulator, by moving the mobile platform, or by a combined motion of both. A synchronized motion of both devices need then to be addressed. Although specific haptic devices explicitly oriented to the control of mobile manipulators need to be designed, there are no commercial solution yet. For this reason it is often necessary to control such as combined systems with traditional haptic devices not specifically oriented to the control of mobile manipulators.
The research activity presented in this Ph.D. thesis focuses in the first place on the design of a teleoperation control scheme which allows the simultaneous control of both the manipulator and the mobile platform by means of a single haptic device characterized by fixed base and an open kinematic chain. Secondly the design of a novel cable-drive haptic devices has been faced. Investigating the use of twisted strings actuation in force rendering is the most interesting challenge of the latter activity.
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Son, Changman. "Adding intelligence to the control of mobile manipulators a comparative study." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/13419.
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Perrier, Clotilde. "Génération de mouvements pour un manipulateur mobile non-holonome." Montpellier 2, 1998. http://www.theses.fr/1998MON20109.
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L'evolution de la robotique ces dernieres annees s'est tournee vers des systemes presentant a la fois des degres de mobilite et de manipulation. De tels systemes sont appeles manipulateurs mobiles. La tache a realiser dans le cadre de cette these est une tache de positionnement de l'extremite de l'effecteur, - en position et en orientation -, en vue de saisir un objet. Le systeme considere, compose d'une part d'un vehicule de type voiture presentant une contrainte de non-holonomie et d'autre part d'un bras manipulateur, est redondant par rapport a la tache a realiser. Deux approches de generation de mouvements sont presentees. La premiere, dite locale tente a chaque instant de se rapprocher du but sans contrainte a priori sur le type de trajectoire finale obtenue. La seconde approche, dite globale, considere la trajectoire globale du systeme et calcule les variables articulaires telles que la trajectoire globale soit realisable. Apres avoir obtenu une sequence de points de passage et de variables articulaires du generateur cite ci-dessus, la question du suivi de trajectoire a l'aide du prototype de manipulateur mobile du lirmm est posee. Un asservissement dans l'espace articulaire est presente, accompagne de resultats experimentaux. Un asservissement dans les espaces de calcul est egalement propose et discute.
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Chen, Tiffany L. "Haptic interaction between naive participants and mobile manipulators in the context of healthcare." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/51770.
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Human-scale mobile robots that manipulate objects (mobile manipulators) have the potential to perform a variety of useful roles in healthcare. Many promising roles for robots require physical contact with patients and caregivers, which is fraught with both psychological and physical implications. In this thesis, we used a human factors approach to evaluate system performance and participant responses when potential end users performed a healthcare task involving physical contact with a robot. We performed four human-robot interaction studies with 100 people who were not experts in robotics (naive participants). We show that physical contact between naive participants and human-scale mobile manipulators can be acceptable and effective in a variety of healthcare contexts. In this thesis, we investigated two forms of touch-based (haptic) interaction relevant to healthcare. First, we studied how participants responded to physical contact initiated by an autonomous robotic nurse. On average, people responded favorably to
robot-initiated touch when the robot indicated that it was a necessary part of a healthcare task. However, their responses strongly depended on what they thought the robot's intentions were, which suggests that this will be an important consideration for future healthcare robots. Second, we investigated the coordination of whole-body motion between human-scale robots and people by the application of forces to the robot's hands and arms. Nurses found this haptic interaction to be intuitive and preferred it over a standard gamepad interface. They also navigated the robot through a cluttered healthcare environment in less time, with fewer collisions, and with less cognitive load via haptic interaction. Through a study with expert dancers, we demonstrated the feasibility of robots as dance-based exercise partners. The experts rated a robot that used only haptic interaction to be a good follower according to subjective measures of dance quality. We also determined that healthy older adults were accepting of using a robot for partner dance-based exercise. On average, they found the robot easy and enjoyable to use and that it performed a partnered stepping task well. The findings in this work make several impacts on the design of robots in healthcare. We found that the perceived intent of robot-initiated touch significantly influenced people's responses. Thus, we determined that autonomous robots that initiate touch with patients can be acceptable in some contexts. This result highlights the importance of
considering the psychological responses of users when designing physical human-robot interactions in addition to considering the mechanics of performing tasks. We found that naive users across three user groups could quickly learn how to effectively use physical interaction to lead a robot during navigation, positioning, and partnered stepping tasks. These consistent results underscore the value of using physical interaction to enable users of varying backgrounds to lead a robot during whole-body motion coordination across different healthcare contexts.
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Chen, Mingwu. "Motion planning and control of mobile manipulators using soft computing techniques." Thesis, University of Sheffield, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266128.
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Wang, Yuquan. "Reactive control and coordination of redundant robotic systems." Doctoral thesis, KTH, Datorseende och robotik, CVAP, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-182680.
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Redundant robotic systems, in terms of manipulators with one or twoarms, mobile manipulators, and multi-agent systems, have received an in-creasing amount of attention in recent years. In this thesis we describe severalways to improve robotic system performance by exploiting the redundancy. As the robot workspace becomes increasingly dynamic, it is common towork with imperfect geometric models of the robots or its workspace. Inorder to control the robot in a robust way in the presence of geometric uncer-tainties, we propose to assess the stability of our controller with respect to acertain task by deriving bounds on the geometric uncertainties. Preliminaryexperimental results support the fact that stability is ensured if the proposedbounds on the geometric uncertainties are fulfilled. As a non-contact measurement, computer vision could provide rich infor-mation for robot control. We introduce a two step method that transformsthe position-based visual servoing problem into a quadratic optimization prob-lem with linear constraints. This method is optimal in terms of minimizinggeodesic distance and allows us to integrate constraints, e.g. visibility con-straints, in a natural way. In the case of a single robot with redundant degrees of freedom, we canspecify a family of complex robotic tasks using constraint based programming(CBP). CBP allows us to represent robotic tasks with a set of equality andinequality constraints. Using these constraints we can formulate quadraticprogramming problems that exploit the redundancy of the robot and itera-tively resolve the trade-off between the different constraints. For example, wecould improve the velocity or force transmission ratios along a task-dependent direction using the priorities between different constraints in real time. Using the reactiveness of CBP, we formulated and implemented a dual-armpan cleaning task. If we mount a dual-arm robot on a mobile base, we proposeto use a virtual kinematic chain to specify the coordination between the mobilebase and two arms. Using the modularity of the CBP, we can integrate themobility and dual-arm manipulation by adding coordination constraints intoan optimization problem where dual-arm manipulation constraints are alreadyspecified. We also found that the reactiveness and modularity of the CBPapproach is important in the context of teleoperation. Inspired by the 3Ddesign community, we proposed a teleoperation interface control mode thatis identical to the ones being used to locally navigate the virtual viewpoint ofmost Computer Aided Design (CAD) softwares. In the case of multiple robots, we combine ideas from multi-agent coopera-tive coverage control, with problem formulations from the resource allocationfield, to create a distributed convergent approach to the resource positioningproblem.QC 20160224
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Amer, Taher. "Evaluating Swiftpoint as a Mobile Device for Direct Manipulation Input." Thesis, University of Canterbury. Computer Science and Software Engineering, 2006. http://hdl.handle.net/10092/1123.
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Swiftpoint is a promising new computer pointing device that is designed primarily for mobile computer users in constrained space. Swiftpoint has many advantages over current pointing devices: it is small, ergonomic, has a digital ink mode, and can be used over a flat keyboard. This thesis aids the development of Swiftpoint by formally evaluating it against two of the most common pointing devices with today's mobile computers: the touchpad, and mouse. Two laws commonly used with pointing devices evaluations, Fitts' Law and the Steering Law, were used to evaluate Swiftpoint. Results showed that Swiftpoint was faster and more accurate than the touchpad. The performance of the mouse was however, superior to both the touchpad and Swiftpoint. Experimental results were reflected in participants' choice for the mouse as their preferred pointing device. However, some participants indicated that their choice was based on their familiarity with the mouse. None of the participants chose the touchpad as their preferred device.
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He, Wuwei. "Reactive control and sensor fusion for mobile manipulators in human robot interaction." Phd thesis, Université Paul Sabatier - Toulouse III, 2013. http://tel.archives-ouvertes.fr/tel-00979633.
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Afin de partager un espace de travail avec les humains, les robots de services doivent être capable d'interagir dans des environnements peu structurés. Dans ce contexte, le robot doit réagir et adapter son comportement aux évolutions de l'environnement et aux activités des humains.L'utilisation de planificateur de mouvement ne permet pas au robot d'être suffisamment réactif, aussi nous proposons un controleur de trajectoire réactif capable de suivre une cible, de réagir aux changement d'atitudes des humains ou de prévenir les évènements et, en particulier, les collisions. Pour fiabiliser le contrôleur de trajectoire, nous utilisons des techniques de fusion de données récentes afin d'identifier les mouvements ou de détecter des forces associées à des évènements. Nous proposons d'utiliser un capteur de force six axes pour estimer les param'etres d'inertie des objets manipulés, puis d'utiliser ces paramètres pour compléter le contrôle visuel et calculer les forces de contact entre l'organe terminal du robot et son environnement. L'utilisation de technique d'apprentissage permet d'analyser et de classifier les forces de contact pour détecter différents évènements tels que la saisie de l'objet par un humain ou le contact entre le robot ou l'objet transporté et l'environnement. Ce travail a été intégré et testé sur les robots jido et PR2 du LAAS-CNRS dans le cadre des projets europ'eens DEXMART et SAPHARI et des projets ANR ASSIST et ICARO.
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Mestiri, Youssef. "Mobile manipulator robot: omni 3 wheels manipulator robot." Master's thesis, 2022. http://hdl.handle.net/10198/25146.
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Mestrado de dupla diplomação com a Université Libre de TunisRobots are electromechanical machines having ability to perform tasks or actions on some given electronic programming. While Omni directional mobile robots have been popularly used in several applications since they can respond more quickly and it would be capable of more sophistication. A robotic arm is a type of mechanical arm, usually programmable, with similar functions to a human arm; the arm may be the sum total of the mechanism or may be part of a more complex robot. This work proposes to design and create a model of a three-Wheeled Omnidirectional manipulator robot that can move faster and transport materials and placed on a processing machine by combine the two type of robots. Using an electrical, mechanical and power supply model controlled by PID control and serial communication between two microcontrollers.
Os robôs são máquinas electromecânicas com capacidade para executar tarefas ou acções em alguma programação electrónica dada. O robôs móveis Omni direccionais têm sido popularmente empregados em várias aplicações porque podem responder mais rapidamente e seriam capazes de ser mais sofisticados. Também um braço robótico é um tipo de braço mecânico, geralmente programável, com funções semelhantes às de um braço humano; o braço pode ser a soma total do mecanismo ou pode fazer parte de um robô mais complexo. Este trabalho propõe-se conceber e criar um modelo de robô manipulador Omnidireccional de três rodas que pode mover-se mais rapidamente e transportar materiais e ser colocado numa máquina de processamento através da fusão dos dois tipos de robôs. Utilizando um modelo eléctrico, mecânico e de alimentação controlado por controlo PID e comunicação em série entre dois microcontroladores.