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1
Pizzonia, Gianluca. "Simulazioni HIL (Human In the Loop) per la valutazione di fattori umani in ambiente di realtà virtuale." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/22980/.
Анотація:
Nel mio progetto di tesi sono state effettuate prove sperimentali presso il Laboratorio di Realtà Virtuale di Forlì volte a valutare il livello di comfort percepito all’interno della cabina di un velivolo regionale riprodotto in Realtà Virtuale. Queste prove hanno coinvolto 31 di partecipanti per la raccolta di dati oggettivi e soggettivi durante o al termine della simulazione. I dati soggettivi vengono raccolti tramite un questionario, progettato in collaborazione con il dipartimento di Psicologia, mentre in simulazione vengono raccolti i dati elettroencefalografici in collaborazione con il dipartimento di Informatica di Cesena.
La tesi in oggetto ha come obiettivo l’organizzazione e l’implementazione di una parte della campagna sperimentale del progetto CASTLE e lo studio di interrelazione tra dati soggettivi, raccolti durante questa specifica fase, resa particolarmente complessa dalla contemporanea raccolta dei dati EEG, successivamente non elaborati in questa tesi ma in altra sede. La durata di ogni prova in laboratorio, consisteva in circa 40 minuti. Per l’analisi di uno studio oggettivo e soggettivo, si è montato sul soggetto una cuffia EEG per analizzare lo stato di confort nei vari casi dell’esperimento, notando se il soggetto una volta terminato l’intero ciclo di esercizi, ed una volta terminati i questionari relativi alle varie prove possa essere comparabile, e quindi paradossalmente osservare la veridicità tra ciò che si dice e ciò che si prova.
2
Torres, Guzman Diana Angélica. "Generation and control of tactile feedback with longitudinal ultrasonic vibration and human-in-the-Loop analysis." Thesis, Université de Lille (2018-2021), 2021. http://www.theses.fr/2021LILUN035.
Анотація:
La technologie haptique offre aux utilisateurs un moyen unique d'interagir avec les mondes virtuels en permettant le transfert direct d'informations entre les interfaces et l'être humain par le biais du sens du toucher. Les dispositifs haptiques de surface utilisent différentes techniques pour moduler la friction afin de simuler la texture. Dans le cas des surfaces haptiques à ultrasons, on utilise des céramiques piézoélectriques qui, alimentées par une tension alternative sinusoïdale, provoquent un mouvement à la surface du dispositif. Ce mouvement est transmis et amplifié par le matériau, à sa fréquence de résonance.Les modes vibratoires transversaux sont couramment utilisés dans la technologie haptique des surfaces ultrasoniques. Ce travail évalue la possibilité d'utiliser les vibrations longitudinales comme une alternative technologique pour produire un retour haptique dans les dispositifs à ultrasons. Pour cela, des comparaisons sont effectuées sur les deux familles de modes, à partir d’un dispositif dédié à la fois d’un point de vue performances énergétiques et qualité des stimuli perçus. L'action et la perception de l'homme dans ce contexte sont très importantes. Malheureusement, en raison de la complexité des phénomènes de friction, la réponse sensorielle est différente d'un utilisateur à l'autre, avec le même stimulus haptique. Pour cette raison, il est intéressant d'explorer l'humain dans la boucle de simulation tactile. Dans ce but, une première tentative de développer le concept de "Human-in-the-Loop" en haptique de surface est présentée dans cette thèse, en utilisant le formalisme EMR (Energetic Macroscopic Representation) développé au sein de l'équipe de contrôle du L2EP et déjà couramment appliqué au HIL (Hardware in the Loop).Cette thèse est organisée comme suit : le chapitre 1 présente l'état de l'art et le positionnement. Le chapitre 2 présente la création et le contrôle d'un dispositif haptique de surface à ondes longitudinales. Dans le chapitre 3, le modèle d'interaction à l'origine de l'effet de modulation de la friction avec la vibration longitudinale ultrasonique est proposé et validé pour le cas où l'exploration se fait dans le même axe que le mouvement de l'onde, ainsi que le cas plus général où l'exploration se fait dans toute autre direction. Dans le chapitre 4, une série d'expériences est conçue pour effectuer une analyse comparative entre la vibration ultrasonore longitudinale et transversale, en termes de besoins énergétiques pour une intensité de texture donnée. A partir de cette étude, il est possible de percevoir une problématique importante dans la conception de dispositifs haptiques de surface à ultrasons : l'adaptation du retour haptique à chaque utilisateur pour obtenir une perception standardisée. Le chapitre 5 traite de cette problématique, en introduisant le concept de force acoustique du doigt et sa corrélation avec le phénomène de réduction de la friction. Enfin, le chapitre 6 présente les leçons apprises dans les chapitres précédents dans une perspective "Human-in-the-loop" et explore les applications futures possibles de ce type d'analyse.Ce travail a été réalisé dans le cadre du projet Mint à l'IRCICA. Il fait donc partie de l'équipe collaborative 'CRIStAL-L2EP-MINT, et du groupe CNRS GdR TACTHaptic technology offers users a unique way of interacting with the virtual world, as it allows direct information transfer between the interfaces and the human through the sense of touch. Surface haptic devices use different techniques to achieve friction modulation in order to simulate texture. In the case of ultrasonic surface haptics, this is achieved with the use of piezoelectric ceramics, which, supplied by a sinusoidal alternating voltage, elicit motion on the surface of the device. This motion is transmitted and amplified by the material, at its resonance frequency.Transversal vibrational modes are commonly used in ultrasonic surface haptic technology. This work evaluates the possibility to use longitudinal vibration as a technological alternative to produce haptic return in ultrasonic devices. Valuable comparisons between transverse and longitudinal modes are performed on a dedicated device, both on the point of view of energetic behavior and stimuli perception quality. The action and perception of the human in this context are very important. Unfortunately, due to the complexity of friction phenomena, the sensory response is different from one user to another, with the same haptic stimulus. For this reason, it is interesting to explore the human in the tactile simulation loop. With this purpose in mind, an initial attempt to develop the concept of "Human-in-the-Loop" in surface haptics is given in this thesis, using the EMR formalism, (Energetic Macroscopic Representation)developed within the L2EP Control team and already commonly applied to HIL (Hardware in the Loop).This PhD thesis is organized as follows: chapter 1 presents the state of the art and the positioning. Chapter 2 presents the creation and control of a longitudinal wave surface haptic device. In Chapter 3, the interaction model at the origin of the friction modulation effect with ultrasonic longitudinal vibration is proposed and validated for the case where the exploration occurs in the same axis as the wave motion, as well as the more general case where the exploration occurs in any other direction. In Chapter 4, a series of experiments are conceived to perform a comparative analysis between longitudinal and transverse ultrasonic vibration, in terms of energetic requirements for a given texture intensity. From this study, it is possible to perceive one important problematic in the design of ultrasonic surface haptic devices: the adaptation of the haptic feedback to each user to achieve a standardized perception. Chapter 5 deals with this problematic, by introducing the concept of acoustic finger force and its correlation with the friction reduction phenomenon. Finally, Chapter 6 presents the lessons learned in the previous chapters in a ‘Human-in-the-loop’ perspective and explores the possible future applications of this type of analysis.This work has been carried out within the framework of the Mint Project at IRCICA. It takes, therefore, part in the collaborative ‘CRIStAL-L2EP-MINT’ team, and CNRS GdR TACT group
3
Mahmud, Akib. "Hardware in the Loop (HIL) Rig Design and Electrical Architecture." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-324661.
Анотація:
Different types of machines are tested utilizing so called Hardware In the Loop simulation. To perform HIL-simulation a rig is used consisting of different types of hardware and software. Some of the hardware that are used during a simulation is located inside an EMS box. The box has not been properly updated since 2004, no documentation of changes has been made and often many errors occurs during simulations due to the lack of traceability. During this project a new structure of the EMS box has been designed with modifications to eliminate existing problems, prevent similar problems to occur in the future and improve the usability of the system. A simulation was performed on the camshaft to test if there were any improvements. Most issues were solved but there were one problem that remained. Some noises existed and were rooted in the old box which undeniably remained in the new one.
4
Dočekal, Martin. "HIL simulace manipulátorů nebo stroje." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-444291.
Анотація:
The diploma thesis deals with HIL simulation (hardware in the loop). The thesis contains a manipulator created in the virtual software V-REP. The connection of real inputs and virtual outputs of the machine is realized by the microcontroller Arduino UNO. The first task deals with the control of the manipulator using the joystick PS2. The second task is a separate control of the robot using an microcontroller Arduino UNO. The resulting connection can be modified in the furher and the interface modified. The work will be used for educational purposes.
5
Malík, Lukáš. "HIL model elektromechanického systému." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-376959.
Анотація:
This diploma thesis deals with creation of elektromechanical model in Modelica language which is subsequently imported into LabVIEW environment. The Modelica language, LabVIEW graphical programming tool and Functional Mock-up Interface 2.0 standard are described in the introduction of this thesis. Functional Mock-up Interface is a tool independent standard witch, defines a standardized interface to ModelExchange and Co-simulation of complex system components. The model of electromechanical system was created based on Functional Mock-up Interface standard. Part of the work focuses on the Functional Mock-up Unit storage possibilities and LabVIEW support to import models of this type. The imported model was simulated and tested in this environment. Finally, the instance of Functional Mock-up Unit was connected with LabVIEW FPGA target for the purpose of model HIL simulation on CompactRIO platform.
6
Bjelevac, Salko, and Peter Karlsson. "Steering System Verification Using Hardware-in-the-Loop." Thesis, Linköpings universitet, Fordonssystem, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-119332.
Анотація:
In order for leading industrial companies to remain competitive, the process of product developement constantly needs to improve. In order to shorten development time -- that is the time from idea to product -- simulations of products in-house is becoming a popular method. This method saves money and time since expensive prototypes become unnecessary. Today the calibration of steering gears is done in test vehicles by experienced test drivers. This is a time consuming process that is very costly because of expensive test vehicles. This report investigates possibilities and difficulties with transfering the calibrations from field to rig. A steering rig has been integrated with a car simulation program. Comparisons between simulation in the loop (SIL) and hardware in the loop (HIL) have been made and differences between different configurations of steering gears have been evaluated. An automatic process including calibration of parameters, testing and analysis of the test results has been implemented. The work laid the foundation of calibration of steering parameters and showed correlation between calibration parameters and objective metrics.
7
Israelsson, Erik. "Modellering och simulering av hydraulik för användning i hardware-in-the-loop." Thesis, Linköpings universitet, Fluida och mekatroniska system, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-78958.
Анотація:
Modeling and simulation is growing ever more important in the development of new products. This thesis describes the use of Hopsan for hydraulic modeling and its use in conjunction with Simulink with the intent of using the model in a hardware-in-the-loop setup. A sensor layer has been created in Simulink to emulate all the internal sensors in a modern forklift. The details of using legacy C-code instead of a hardware MCU for a fully simulated environment, software-in-the-loop has been outlined. There are two major routes one can follow implementing software-in-the-loop, exporting the C-functions to CAPL via a export layer or creating an s-function in Simulink. Of the two the export layer method is the most promising since it is easier handling different execution times in CAPL than in Simulink.
8
Gordillo, Carrillo Camilo Andrés. "Estratégias para a correção dos efeitos de atraso de sistemas Hardware In the Loop (HIL)." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264974.
Анотація:
Orientador: Janito Vaqueiro FerreiraDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica
Made available in DSpace on 2018-08-20T09:38:04Z (GMT). No. of bitstreams: 1 GordilloCarrillo_CamiloAndres_M.pdf: 5104981 bytes, checksum: cd95669708a4fb537590b77509d111b9 (MD5) Previous issue date: 2012
Resumo: O conceito de Hardware In the Loop (HIL) é bastante útil em indústrias automotivas e em indústrias espaciais, já que sistemas complexos são difíceis de se modelar. Este conceito proporciona uma grande confiabilidade aos resultados, diminui o risco de avaria dos equipamentos e dos usuários em seu funcionamento, como também uma diminuição do tempo no desenvolvimento de projetos. Tudo isto sem precisar de um orçamento elevado ou protótipos elaborados para realização de testes. Neste trabalho propõem-se duas estratégias para solucionar o problema do atraso (delay) apresentado pelo sinal de resposta nos sistemas HIL em tempo real, levando-se em conta a sequência de execução real dos processos, bem como também outros aspectos como dos sistemas de aquisição e atuação (inercia, limitações de hardware e software, tempo de amostragem). Os resultados obtidos através das estratégias propostas foram analisados e comparados com resultados numéricos em uma bancada experimental obtendo uma boa concordância eliminando o atraso na resposta
Abstract: The Hardware In the Loop (HIL) concept is useful in automotive and spaceship industries, because of the difficulty of modeling complex systems. This concept provides great reliability at the results, decrease the risk of damage to the equipment and to the user operation, as well as decreasing the time of projects development. All of this without requiring a high budget or developing prototypes for testing. This study propose a strategy to solve the delay problem presented by the response signal in real time HIL systems, considering a real execution sequence of the process, as well as other aspects such as in the acquisition and the actuation systems (inertia, hardware and software limitations, sample time). The results obtained through the proposed strategies was analyzed and compared with numerical results in a testing platform with excellent concordance eliminating the delay in the response
Mestrado
Mecanica dos Sólidos e Projeto Mecanico
Mestre em Engenharia Mecânica
9
Goulkhah, Mohammad (Monty). "Waveform relaxation based hardware-in-the-loop simulation." Cigre Canada, 2014. http://hdl.handle.net/1993/31012.
Анотація:
This thesis introduces an alternative potentially low cost solution for hardware-in-the-loop (HIL) simulation based on the waveform relaxation (WR) method. The WR tech-nique is extended so that, without the need for a real-time simulator, the behaviour of an actual piece of physical hardware can nevertheless be tested as though it were connected to a large external electrical network. This is achieved by simulating the external network on an off-line electromagnetic transients (EMT) simulation program, and utilizing iterative exchange of waveforms between the simulation and the hardware by means of a spe-cialized Real-Time Player/Recorder (RTPR) interface device. The approach is referred to as waveform relaxation based hardware-in-the-loop (WR-HIL) simulation.
To make the method possible, the thesis introduces several new innovations for stabi-lizing and accelerating the WR-HIL algorithm. It is shown that the classical WR shows poor or no convergence when at least one of the subsystems is an actual device. The noise and analog-digital converters’ quantization errors and other hardware disturbances can affect the waveforms and cause the WR to diverge. Therefore, the application of the WR method in performing HIL simulation is not straightforward and the classical WR need to be modified accordingly.
Three convergence techniques are proposed to improve the WR-HIL simulation con-vergence. Each technique is evaluated by an experimental example. The stability of the WR-HIL simulation is studied and a stabilization technique is proposed to provide suffi-cient conditions for the simulation stability.
The approach is also extended to include the optimization of the parameters of power system controllers located in geographically distant places. The WR-HIL simulation technique is presented with several examples. At the end of the thesis, suggestions for the future work are presented.February 2016
10
Wang, Lingchang XI. "Development of a Hardware-In-the-Loop Simulator for Battery Management Systems." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1397656909.
11
Mahanti, Kritee. "Hardware-in-the-loop simulation and testing of the ADCS of the Beyond Atlas CubeSat." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-292413.
Анотація:
Beyond Atlas, a company based in Danderyd, Sweden is working on a Low Earth Orbit (LEO) 3U-CubeSat (Cube Satellite) exploration mission. As part of their maiden mission, they aim to validate the navigation, propulsion, and communication techniques of a CubeSat while it performs orbital maneuvers to collect photographs of space debris. This study briefly introduces the Beyond Atlas mission and its CubeSat design. The thesis work then mainly focuses on the details of the Attitude Determination and Control System (ADCS) peripherals and software onboard the CubeSat. It describes the Attitude Determination peripherals such as the sun sensor, star tracker, magnetometer, and gyroscope that will be onboard the CubeSat, followed by the description of the Attitude Control peripherals, namely, the magnetorquer and the reaction wheel. Subsequently, it discusses the hardware’s configuration and interface techniques with the flight computer that specifically caters to the satellite’s attitude determination and control aspect. Finally, it reports a Hardware-in-the-loop (HIL) testing methodology, and the corresponding results obtained from the unit testing of the peripherals and the operational testing (Detumbling and Pointing) of the ADCS of the Beyond Atlas CubeSat. Based on the testing results, the report concludes that the selected hardware for the Beyond Atlas mission, when integrated, can perform the principal functionalities.Beyond Atlas baserat i Danderyd, Sverige är ett företag som arbetar med ett rymdutforsknings projekt. Som en del av deras jungfruuppdrag används en 3UCubeSat för att validera navigering, framdrivning och kommunikationsningar medan den utför banmanövrer för relativnavigation och tar bilder av rymdskräp. Denna studie introducerar kort Beyond Atlas uppdraget och dess CubeSat-design. Rapporten fokuserar sedan huvudsakligen på detaljerna i ADCS kringutrustning och programvara ombord på CubeSat. Den beskriver attitydkännande utrustning som solsensorer, startracker, magnetometer och rategyro som finns ombord, följt av beskrivningen av attitydst yrenheter, nämligen magnetorquer och reaktionshjul. Därefter diskuteras hårdvarans konfiguration och gränssnitt med navigationsdatorn som dedikerat utför satellitens attitydbestämning och attitydkontroll ADCS. Slutligen rapporterar studien testmetodik av inledande validerings-tester (Detumbling and Pointing) av ADCS i Beyond Atlas CubeSat. Baserat på testresultaten drar rapporten slutsatsen att den valda hårdvaran för satelliten kan utföra de primära navigationsfunktionerna.
12
Gafurov, Salimzhan A., Viktor M. Reshetov, Vera A. Salmina, and Heikki Handroos. "Multi-operated HIL Test Bench for Testing Underwater Robot’s Buoyancy Variation System." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-200590.
Анотація:
Nowadays underwater gliders have become to play a vital role in ocean exploration and allow to obtain the valuable information about underwater environment. The traditional approach to the development of such vehicles requires a thorough design of each subsystem and conducting a number of expensive full scale tests for validation the accuracy of connections between these subsystems. However, present requirements to cost-effective development of underwater vehicles need the development of a reliable sampling and testing platform that allows the conducting a preliminary design of components and systems (hardware and software) of the vehicle, its simulation and finally testing and verification of missions. This paper describes the development of the HIL test bench for underwater applications. Paper discuses some advantages of HIL methodology provides a brief overview of buoyancy variation systems. In this paper we focused on hydraulic part of the developed test bench and its architecture, environment and tools. Some obtained results of several buoyancy variation systems testing are described in this paper. These results have allowed us to estimate the most efficient design of the buoyancy variation system. The main contribution of this work is to present a powerful tool for engineers to find hidden errors in underwater gliders development process and to improve the integration between glider’s subsystems by gaining insights into their operation and dynamics.
13
Almas, Muhammad Shoaib, Rujiroj Leelaruji, and Luigi Vanfretti. "Over-current relay model implementation for real time simulation & Hardware-in-the-Loop (HIL) validation." KTH, Elektriska energisystem, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-118339.
Анотація:
Digital microprocessor based relays are currently being utilized for safe, reliable and efficient operation of power systems. The overcurrent protection relay is the most extensively used component to safeguard power systems from the detrimental effects of faults. Wrong settings in overcurrent relay parameters can lead to false tripping or even bypassing fault conditions which can lead to a catastrophe. Therefore it is important to validate the settings of power protection equipment and to confirm its performance when subject to different fault conditions. This paper presents the modeling of an overcurrent relay in SimPowerSystems (\textsc {matlab}/Simulink). The overcurrent relay has the features of instantaneous, time definite and inverse definite minimum time (IDMT) characteristics. A power system is modeled in SimPowerSystems and this overcurrent relay model is incorporated in the test case. The overall model is then simulated in real-time using Opal-RT's eMEGAsim real-time simulator to analyze the relay's performance when subjected to faults and with different characteristic settings in the relay model. Finally Hardware-in-the-Loop validation of the model is done by using the overcurrent protection feature in Schweitzer Engineering Laboratories Relay SEL-487E. The event reports generated by the SEL relays during Hardware-in-the-Loop testing are compared with the results obtained from the standalone testing and software model to validate the model.QC 20130215
14
Acevedo, Miguel. "FPGA-Based Hardware-In-the-Loop Co-Simulator Platform for SystemModeler." Thesis, Linköpings universitet, Datorteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-133413.
Анотація:
This thesis proposes and implements a flexible platform to perform Hardware-In-the-Loop (HIL) co-simulation using a Field-Programmable-Gate-Array (FPGA). The HIL simulations are performed with SystemModeler working as a software simulator and the FPGA as the co-simulator platform for the digital hardware design. The work presented in this thesis consists of the creation of: A communication library in the host computer, a system in the FPGA that allows implementation of different digital designs with varying architectures, and an interface between the host computer and the FPGA to transmit the data. The efficiency of the proposed system is studied with the implementation of two common digital hardware designs, a PID controller and a filter. The results of the HIL simulations of those two hardware designs are used to verify the platform and measure the timing and area performance of the proposed HIL platform.
15
Paul, Priya. "Automated test development for vehicle instrument panel cluster using Hardware-in-the-loop (HIL) and Computer Vision." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.
Анотація:
Automation of validation tests can significantly save time and improve accuracy. This thesis presents a method to automate the
tests done on the Instrument Panel Cluster (IPC) of a car by using Hardware-in-the-Loop (HIL) and Optical Character Recognition
(OCR). HIL technique helps to test the system with real signals
and the system with the camera captures pictures to do OCR
analysis for the extraction of messages displayed in the IPC. The
developed OCR feature is added to the existing automation tool of
the FCA group and the tests conducted in the internal test benches of Maserati.
OCR technique is widely used in the automotive sector for validation testing of the IPC. In this thesis, the development is done by first performing a sequence of image processing on the captured image of the IPC and then feeding it to the OCR engine with the required language. The result showed the system to work efficiently as it extracted the messages from the captured images with confidence values close to 90 percent.The testing was done in different languages and low confidence values were found only for some languages with complex letters. After the developed OCR feature was integrated to the internal automation tool, tests were carried out both in the functional test bench and the integration test bench. A test case was defined based on a specific vehicle function and the final pass or fail report generated automatically.
16
Janczak, John. "Implementation of a Hardware-in-the-Loop System Using Scale Model Hardware for Hybrid Electric Vehicle Development." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/33881.
Анотація:
Hardware-in-a-loop (HIL) testing and simulation for components and control strategies can reduce both time and cost of development. HIL testing focuses on one component or control system rather than the entire vehicle. The rest of the system is simulated by computer systems which use real time data acquisition systems to read outputs and respond like the systems in the actual vehicle would respond. The hardware for the system is on a scaled-down level to save both time and money during testing.
The system designed to simulate the REVLSE Equinox split parallel hybrid consists of five direct current (DC) permanent magnet motors. These motors are used in the system to test the controller software of the vehicle. Two of the motors act as power plants simulating the spark ignited Ethanol engine and the rear traction motor. These two motors are controlled by DC variable speed controllers. The other motors are used as generators to simulate the load from the belted alternator starter (BAS) and the road load on each axle. The motors on each axle are joined together mechanically using a belt and pulley system. The front and rear axle of the system are not connected to simulate the actual vehicle where the power plants are gear-reduced before they make contact with the road and therefore do not actually spin at the same speeds.
The computer software and hardware used to run the HIL hybrid system is National Instruments LabView and CompactRIO. LabView provides an easy interface through which programs for the RIO can be written. The RIO gives the user the ability to measure the power into and out of different components in the system to measure the efficiency of the system. The ability to measure system efficiencies using different powertrain inputs and loading schemes is what makes the HIL system a valuable tool in control modeling for the Equinox. LabView and the RIO allow the user to optimize the control strategy with the two power plant inputs and the BAS to make sure the high voltage system stays charged and improve the overall efficiency of the vehicle without the actual vehicle. The HIL system allows other work to be done of the vehicle during the control development.
During a constant axle speed test at 730 RPM with constant generator resistance, the front engine efficiency was 33.8%, the BAS efficiency was 53.0%, the rear load generator efficiency was 51.2% and the overall efficiency of the front axle was 24.0%. These results show that the system can simulate the powertrain of a hybrid vehicle and help create and validate a control scheme.Master of Science
17
Cherragui, Mohamed. "Développement d'un simulateur Hardware-in-the-Loop (HIL) d'un système pile à combustible à membrane échangeuse de proton." Thesis, Bourgogne Franche-Comté, 2017. http://www.theses.fr/2017UBFCD034.
Анотація:
La pile à combustible (PàC) est une source d’énergie qui produit de l’électricité à partir de l’hydrogène et de l’oxygène.Elles sont très prometteuses pour la production d'énergie électrique. Néanmoins, la PàC souffre encore d’imperfections limitant ainsi sa commercialisation à grande échelle, tout particulièrement pour les applications de transport.C’est pourquoi, l’hybridation des différentes sources d’énergies est devenue une réalité pour les applications non-stationnaires telles que les véhicules tout électriques.Cependant ces applications nécessitent des solutions de gestion de l’énergie fiables prenant en compte toutes les contraintes du système électrique hybride.Par conséquent, le développement de plateforme de validation est nécessaire.Dans ce contexte, le Hardware In the Loop (HIL) est une technique très prometteuse, où une partie d’un système réel peut être remplacée par un système virtuel tout en respectant la communication entre ces sous-systèmes physiques et virtuels.Ce mémoire détaille des modèles dynamiques d'une pile à combustible échangeuse de proton (PEMFC) hybridée à des supercondensateurs.Par ailleurs, on détaille la gestion d’énergie entre ces deux sources, ainsi que le pronostic de la pile basé d’une part d’un filtre de Kalman étendu (EKF) pour l’estimation de l’état de santé (SoH) réel de la pile, et d’autre part, de la méthode Inverse First Order Reliability Method (IFORM) en vue d’estimer la durée de vie utile restante de la pile, tout cela dans une approche Hardware-In-The-Loop (HIL)The fuel cell is a source of energy that generates electricity from hydrogen and oxygen.They are very promising candidates for the production of electric power.Nevertheless, the fuel cell still suffers from imperfections limiting its commercialization on a full scale, in particular for transport applications.This is the reason why, hybridization of different energy sources has become a reality for non-stationary applications such as all-electric vehicles.However, these applications require reliable energy management solutions that take into account all the constraints of the hybrid electrical system.Therefore, the development of validation platform is necessary.In this context, the Hardware In the Loop (HIL) is a very promising technique, where part of a real system can be replaced by a virtual system while respecting the communication between these physical and virtual subsystems.This document details the dynamic models of a proton exchange membrane fuel cell (PEMFC) associated with supercapacitors.Furthermore, the energy management between these two sources and the prognostic of the fuel cell composed of a extenced Kalman Filter filter (EKF) for the estimation of the real state of health (SoH) of the stack and, on the other hand, of the Inverse First Order Reliability Method (IFORM) in order to estimate the remaining useful life of the stack, all implemented in an FPGA control board in a Hardware-In-The-Loop (HIL) context
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Chipalkatty, Rahul. "Human-in-the-loop control for cooperative human-robot tasks." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/43649.
Анотація:
Even with the advance of autonomous robotics and automation, many automated tasks still require human intervention or guidance to mediate uncertainties in the environment or to execute the complexities of a task that autonomous robots are not yet equipped to handle. As such, robot controllers are needed that utilize the strengths of both autonomous agents, adept at handling lower level control tasks, and humans, superior at handling higher-level cognitive tasks.
To address this need, we develop a control theoretic framework that seeks to incorporate user commands such that user intention is preserved while an automated task is carried out by the controller. This is a novel approach in that system theoretic tools allow for analytic guarantees of feasibility and convergence to goal states which naturally lead to varying levels of autonomy. We develop a model predictive controller that takes human input, infers human intent, then applies a control that minimizes deviations from the intended human control while ensuring that the lower-level automated task is being completed.
This control framework is then evaluated in a human operator study involving a shared control task with human guidance of a mobile robot for navigation. These theoretical and experimental results lay the foundation for applying this control method for human-robot cooperative control to actual human-robot tasks. Specifically, the control is applied to a Urban Search and Rescue robot task where the shared control of a quadruped rescue robot is needed to ensure static stability during human-guided leg placements in uneven terrain. This control framework is also extended to a multiple user and multiple agent system where the human operators control multiple agents such that the agents maintain a formation while allowing the human operators to manipulate the shape of the formation. User studies are also conducted to evaluate the control in multiple operator scenarios.
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Tjerngren, Jon. "Modeling and Hardware-in-the-loop Simulations of Contactor Dynamics : Mechanics, Electromagnetics and Software." Thesis, Linköpings universitet, Institutionen för systemteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-107744.
Анотація:
This master thesis’s subject is to model an ABB contactor’s dynamics and to develop a hardware-in-the-loop simulation environment. The hardware-in-the-loop method utilizes computer models that are simulated in a real-time simulator. The real-time simulator is connected to hardware components. A contactor is an electrically controlled mechanical switching device and it is used in circuits where large currents can occur. In this thesis, the contactor is divided into three separate subsystems and models are developed for each of them. The three subsystems correspond to the contactor’s mechanics, electromagnetics and electronic components. Computer models are implemented in MATLAB and Simulink to realize the subsystems. The hardware part, of the hardware-in-the-loop simulations, consists of electronic parts that are not modeled. To connect the hardware part to a real-time simulator, from dSPACE, a hardware interface was constructed. This report focuses on the modeling of the mechanics and the electromagnetics as well as the software implementations. The thesis work was carried out in collaboration with another student. The focuses of his report are the modeling of the electronics and the construction of the hardware interface. Validation of the hardware-in-the-loop simulations is done by using measurements collected from a real contactor. The conclusion is that the simulations of the contactor’s behavior correspond well with a real contactor.
20
Medisetti, Praveen. "REAL TIME SIMULATION AND HARDWARE-IN-LOOP TESTING OF A HYBRID ELECTRIC VEHICLE CONTROL SYSTEM." University of Akron / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=akron1170439524.
21
Thomas, Clayton Austin. "Modeling and Performance Analysis of a 10-Speed Automatic Transmission for X-in-the-Loop Simulation." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1532014317646195.
22
Bringes, Christine Elizabeth. "Determining the Benefit of Human Input in Human-in-the-Loop Robotic Systems." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4641.
Анотація:
This work analyzes human-in-the-loop robotic systems to determine where human input can be most beneficial to a collaborative task. This is accomplished by implementing a pick-and-place task using a human-in-the-loop robotic system and determining which segments of the task, when replaced by human guidance, provide the most improvement to overall task performance and require the least cognitive effort.
The first experiment entails implementing a pick and place task on a commercial robotic arm. Initially, we look at a pick-and-place task that is segmented into two main areas: coarse approach towards a goal object and fine pick motion. For the fine picking phase, we look at the importance of user guidance in terms of position and orientation of the end effector. Results from this initial experiment show that the most successful strategy for our human-in-the-loop system is the one in which the human specifies a general region for grasping, and the robotic system completes the remaining elements of the task. We extend this study to include a second experiment, utilizing a more complex robotic system and pick-and-place task to further analyze human impact in a human-in-the-loop system in a more realistic setting. In this experiment, we use a robotic system that utilizes an Xbox Kinect as a vision sensor, a more cluttered environment, and a pick-and-place task that we segment in a way similar to the first experiment.
Results from the second experiment indicate that allowing the user to make fine tuned adjustments to the position and orientation of the robotic hand can improve task success in high noise situations in which the autonomous robotic system might otherwise fail. The experimental setups and procedures used in this thesis can be generalized and used to guide similar analysis of human impact in other human-in-the-loop systems performing other tasks.
23
Liang, Jiongqian. "Human-in-the-loop Machine Learning: Algorithms and Applications." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1523988406039076.
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Rasman, Brandon Gerald. "Sensorimotor loop delays in the control of human stance." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/59843.
Анотація:
Maintaining upright stance involves a time-critical process in which the central nervous system monitors postural orientation and modulates muscle activity accordingly. Visual, vestibular and somatosensory systems detect body motion that the balance controller utilizes to update standing control. The time delays between motor output and the resulting sensory feedback are expected and likely accommodated for. Consequently, we perceive whole-body movement as being a consequence of our own actions. Balance control, however, also involves processes that do not rely on conscious perception, allowing us to maintain standing balance almost effortlessly. Recent studies have demonstrated that both the perception and vestibular control of balance are modulated when sensory signals of whole-body movement do not match self-generated ankle torques. The aim of this thesis was to explore the temporal properties of the sensorimotor loops driving the perception and vestibular control of standing balance. Using a robotic balance simulator, experimentally-induced time delays were introduced between human participant’s ankle-produced torques and body movement. The first experiment used a psychophysical design to determine what delay is needed for humans to perceive a change in balance control. All participants were able to perceive a 300 ms delay with 100% success, with an average 69% correct threshold of 155 ms. In the second experiment, participants were exposed to a virtual vestibular perturbation while they balanced their body at different induced delays. Vestibular-evoked muscle responses attenuated with increasing loop delays, falling to amplitudes 84% smaller than baseline when a 500 ms delay was introduced between the produced torques and body movement. This is the first study to explore the time domain relationship between sensory and motor signals in standing, and the results reveal and describe temporal constraints of the sensorimotor control of balance. The present findings will act as springboard for studying postural control mechanisms in the future, encouraging the use of this robotic simulator to alter sensorimotor relationships during ongoing balance control. Using interventions like induced delays, we can decipher the natural processes that govern posture, and explore the adaptability and plasticity of these systems.Education, Faculty of
Graduate
25
Ramirez, Steven Abraham. "Supervisory Control Validation of a Fuel Cell Hybrid Bus Using Software-in-the-Loop and Hardware-in-the-Loop Techniques." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1386067721.
26
Wollenbecker, Joan M. "Using MTWS for human-in-the-loop C2 organizational experiments." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1999. http://handle.dtic.mil/100.2/ADA369243.
Анотація:
Thesis (M.S. in Systems Technology (Command, Control, Computers, Communications, and Intelligence)) Naval Postgraduate School, September 1999."September 1999". Thesis advisors(s): William G. Kemple, Gary R. Porter. Cover title: Using ... experiements. Includes bibliographical references (p. 451). Also Available online.
27
Onyango, Stevine Obura. "Behaviour Modelling and System Control with Human in the Loop." Thesis, Paris Est, 2017. http://www.theses.fr/2017PESC1162/document.
Анотація:
Malgré le progrès en recherche et développement dans le domaine de système autonome, de tels systèmes nécessitent l’intervention humaine pour résoudre les problèmes imprévus durant l’exécution des tâches par l’utilisateur.Il est donc nécessaire, malgré cette autonomie, de tenir compte du comportement du conducteur et il est difficile d’ignorer l’effet de l’intervention humaine dans le cadre de l’évolution continue de l’environnement et des préférences de l’utilisateur. Afin d’exécuter les opérations selon les attentes de l’opérateur, il est nécessaire d’incorporer dans la commande les besoins de l’utilisateur.Dans les travaux présentés dans cette thèse un modèle comportemental de l’utilisateur est développé et intégré dans la boucle de commande afin d’adapter la commande à l’utilisateur. Ceci est appliqué à la commande des fauteuils électrique et assiste dans la navigation du fauteuil dans un milieu encombré.Le développement du modèle comportemental est basé sur la méthode de potentielles orientées et la détection des obstacles et le comportement du conducteur vs de ces obstacles par l’adaptation duL’étude contribue également au développement d’un modèle dynamique du fauteuil utilisable dans des situations normales et exceptionnelles telle que le dérapage. Ce modèle est développé pour un le cas le plus courant des fauteuil avec roues arrière conductrices utilisant le formalisme Euler Lagrange avec les forces gravitationnelles et sur des surfaces inclinées.Dans la formulation de la commande, le modèle du conducteur est introduit dans la boucle de commande. L’optimalité de la performance est assurée par l’utilisation du commande prédictif généralisé pour le système en temps continue. Les résultats de la simulation démontrent l’efficacité de l’approche proposée pour l’adaptation de la commande au comportement du conducteurAlthough the progressive research and development of autonomous systems is fairly evident, such systems still require human interventions to solve the unforeseen complexities, and clear the uncertainties encountered in the execution of user-tasks. Thus, in spite of the system's autonomy, it may not be possible to absolutely disregard the operator's role. Human intervention, particularly in the control of auto-mobiles, may as well be hard to ignore because of the constantly changing operational context and the evolving nature of the drivers' needs and preferences. In order to execute the autonomous operations in conformity with the operator's expectations, it may be necessary to incorporate the advancing needs and behaviour of the operator in the design. This thesis formulates an operator behaviour model, and integrates the model in the control loop to adapt the functionality of a human-machine system to the operator's behaviour. The study focuses on a powered wheelchair, and contributes to the advancement of steering performance, through background assistance by modelling, empirical estimation and incorporation of the driver's steering behaviour into the control system. The formulation of the steering behaviour model is based on two fundamentals: the general empirical knowledge of wheelchair steering, and the experimental steering data captured by a standard powered wheelchair, on both virtual and real environments. The study considers a reactive directed potential field (DPF) method in the modelling of drivers' risk detection and avoidance behaviour, and applies the ordinary least square procedure in the identification of best-fitting driver parameters. The study also contributes to the development of a dynamic model of the wheelchair, usable under normal and non-normal conditions, by taking into consideration the conventional differential drive wheelchair structure with two front castor wheels. Derivation of the dynamic model, based on the Euler Lagrange formalism, is carried out in two folds: initially by considering the gravitational forces subjected to the wheelchair on inclined configurations with no slipping situations, and finally by incorporating slipping parameters into the model. Determination of the slipping parameters is approached from the geometric perspective, by considering the non-holonomic motions of the wheelchair in the Euclidean space. In the closed-loop model, the input-output feedback controller is proposed for the tracking of user inputs by torque compensation. The optimality of the resulting minimum-phase closed-loop system is then ensured through the performance index of the non-linear continuous-time generalised predictive control (GPC). Simulation results demonstrate the expected behaviour of the wheelchair dynamic model, the steering behaviour model and the assistive capability of the closed-loop system
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Varais, Andy. "Modèles à échelle réduite en similitude pour l'ingénierie système et l'expérimentation simulée "temps compacté" : application à un microréseau incluant un stockage électrochimique." Thesis, Toulouse, INPT, 2019. http://www.theses.fr/2019INPT0007/document.
Анотація:
Cette thèse a été réalisée en collaboration avec la société SCLE SFE (Groupe ENGIE) et le laboratoire Laplace. Elle porte sur le développement d’une méthodologie permettant d’élaborer des modèles dits « en similitude », à échelle de puissance et de temps réduites. Ces modèles peuvent servir pour l’analyse des systèmes mais ils sont en particulier utiles pour l’expérimentation en temps réel des systèmes énergétiques. En effet, les expérimentations sont très souvent menées à échelle réduite pour des questions de taille, de coût,… Certaines parties de ces expérimentations peuvent être « émulées » (simulées physiquement par des dispositifs de puissance) d’autres étant constitués de composants physiques : on parle alors de procédure Hardware in the Loop (HIL). Même si, à la base, la démarche de réduction d’échelle a une portée générale, notre gamme d’application principale concerne les micro réseaux avec intégration de sources renouvelables intermittentes couplées à des composants de stockage. En conséquence,nos travaux se focalisent sur la mise en œuvre de modèles de similitudes en puissance/énergie/temps de sources ENR et de stockeurs. La notion de réduction de temps, nous parlerons de « temps virtuel compacté », est un des concepts clés de ces travaux. Une attention particulière est portée sur le développement d’un émulateur physique de batterie électrochimique.En effet, le stockage d’énergie est un point clé dans un micro réseau. De plus, cet élément présente de fortes non-linéarités dont la mise en similitude doit impérativement tenir compte et n’est pas triviale. Une fois ces modèles développés, on les éprouve via la mise en œuvre d’essais en expérimentation simulée par émulateurs physiques à échelle de puissance réduite et en temps virtuel compacté. Ces essais permettent par ailleurs de confronter les notions d’émulateurs «copie-modèle », pour lequel un modèle est utilisé pour reproduire le comportement du système, et d’émulateurs « copie-image », où le comportement du système est reproduit à partir d’un de ses composants réels (par exemple une cellule pour la batterie)This thesis was carried out in collaboration with SCLE SFE (ENGIE Group) and the Laplacelaboratory. It focuses on the establishment of a methodology allowing the “similarity” modelsdevelopment, with reduced power and time scale. These models can be used for systems analysisbut they are particularly useful for real-time experimentation of energy systems. Indeed, theexperiments are often carried out on a small scale for issues of size, cost, … Some parts of theseexperiments can be "emulated" (physically simulated by power devices) while others consist ofphysical components: this is called the Hardware in the Loop (HIL) procedure. Although, initially,the downscaling approach is broad in scope, our main field of application is microgrids withintegration of intermittent renewable sources coupled with storage components. As a result, ourwork focuses on the implementation of power / energy / time similarity models of ENR sources andstorage facilities. The concept of time reduction, we will talk about "compacted virtual time", is oneof the key concepts of this work. Particular attention is paid to the development of a physicalemulator of electrochemical battery. Indeed, energy storage is a key point in microgrid. In addition,this element has strong nonlinearities whose scaling in similarity must imperatively take intoaccount and is not trivial. Once these models have been developed, they are tested through theimplementation of simulated experiments using physical emulators with reduced power scale andcompacted virtual time. These tests also make it possible to compare the concepts of "copymodel" emulators, for which a model is used to reproduce the behavior of the system, and "copyimage" emulators, where the behavior of the system is reproduced from of one of its realcomponents (for example a cell for the battery)
29
Fadhloun, Karim. "Modeling Human And Machine-In-The-Loop In Car-Following Theory." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/95208.
Анотація:
Most phenomena in engineering fields involve physical variables that can potentially be predicted using simple or complex mathematical models. However, traffic engineers and researchers are faced with a complex challenge since they have to deal with the human element. For instance, it can be stated that the biggest challenge facing researchers in the area of car-following theory relates to accounting for the human-in-the-loop while modeling the longitudinal motion of the vehicles. In fact, a major drawback of existing car-following models is that the human-in-the-loop is not modeled explicitly. This is specifically important since the output from car-following models directly impacts several other factors and measures of effectiveness, such as vehicle emissions and fuel consumption levels.
The main contribution of this research relates to modeling and incorporating, in an explicit and independent manner, the human-in-the-loop component in car-following theory in such a way that it can be either activated or deactivated depending on if a human driver is in control of the vehicle. That would ensure that a car-following model is able to reflect the different control and autonomy levels that a vehicle could be operated under. Besides that, this thesis offers a better understanding of how humans behave and differ from each other. In fact, through the implementation of explicit parameters representing the human-in-the-loop element, the heterogeneity of human behavior, in terms of driving patterns and styles, is captured.
To achieve its contributions, the study starts by modifying the maximum acceleration vehicle-dynamics model by explicitly incorporating parameters that aim to model driver behavior in its expression making it suitable for the representation of typical acceleration behavior. The modified variant of the model is demonstrated to have a flexible shape that allows it to model different types of variations that drivers can generate, and to be superior to other similar models in that it predicts more accurate acceleration levels in all domains. The resulting model is then integrated in the Rakha-Pasumarthy-Adjerid car-following model, which uses a steady-state formulation along with acceleration and collision avoidance constraints to model the longitudinal motion of vehicles. The validation of the model using a naturalistic dataset found that the modified formulation successfully integrated the human behavior component in the model and that the new formulation decreases the modeling error.
Thereafter, this dissertation proposes a new car-following model, which we term the Fadhloun-Rakha model. Even though structurally different, the developed model incorporates the key components of the Rakha-Pasumarthy-Adjerid model in that it uses the same steady state formulation, respects vehicle dynamics, and uses very similar collision-avoidance strategies to ensure safe following distances between vehicles. Besides offering a better fit to empirical data, the Fadhloun-Rakha model is inclusive of the following characteristics: (1) it models the driver throttle and brake pedal input; (2) it captures driver variability; (3) it allows for shorter than steady-state following distances when following faster leading vehicles; (4) it offers a much smoother acceleration profile; and (5) it explicitly captures driver perception and control inaccuracies and errors. Through a quantitative and qualitative evaluation using naturalistic data, the new model is demonstrated to outperform other state-of-the-practice car-following models. In fact, the model is proved to result in a significant decrease in the modeling error, and to generate trajectories that are highly consistent with the observed car-following behavior.
The final part of this study investigates a case in which the driver is excluded and the vehicles are operating in a connected environment. This section aims to showcase a scenario in which the human-in-the-loop is deactivated through the development of a platooning strategy that governs the motion of connected cooperative multi-vehicle platoons.Doctor of Philosophy
Even though the study of the longitudinal motion of vehicles spanned over several decades leading to the development of more precise and complex car-following models, an important aspect was constantly overlooked in those models. In fact, due to the complexity of modeling the human-in-the-loop, the vehicle and the driver were almost always assumed to represent a single entity. More specifically, ignoring driver behavior and integrating it to the vehicle allowed avoiding to deal with the challenges related to modeling human behavior. The difficulty of mathematically modeling the vehicle and the driver as two independent components rather than one unique system is due to two main reasons. First, there are numerous car models and types that make it difficult to determine the different parameters impacting the performance of the vehicle as they differ from vehicle to vehicle. Second, different driving patterns exist and the fact that they are mostly dependent on human behavior and psychology makes them very difficult to replicate mathematically. The research presented in this thesis provides a comprehensive investigation of the human-in-the-loop component in car-following theory leading to a better understanding of the human-vehicle interaction. This study was initiated due to the noticeable overlooking of driver behavior in the existing literature which, as a result, fails to capture the effect of human control and perception errors.
30
Ledo, López Guillermo. "Development and Implementation of a Mass Balancing System for CubeSat Attitude Hardware-in-the-Loop Simulations." Thesis, Luleå tekniska universitet, Rymdteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-72351.
Анотація:
Spacecraft simulator platforms can simulate the microgravity environment of space on Earth, for the purposes of testing the Attitude and Orbit Control Subsystem of satellites. In order to do this, the satellite is mounted on a bench and the combined center of mass of this assembly is controlled by a series of moving masses. The objective is to bring this center or mass as close as possible to the center of rotation, since solids in microgravity always rotate around their own center of mass. The air-bearing platform located, designed and built at the NanoSat Laboratory of the Kiruna Space Campus of the Luleå University of Technology makes use of four balancing masses, which are displaced by that number of linear actuators. This document explains the process followed to design an algorithm for the estimation of the center of mass and the subsequent calculation of the required positions of the balancing masses to bring this center of mass back to the center of rotation. First, the equations of rotational motion of the bench were found through two formulations: quaternions and Euler-Lagrange. Secondly, these equations were used to obtain an estimation of the center of mass via Batch Least-Squares. Thirdly, the equations of the center of mass of a system of point masses were used to find the proper positions of the balancing masses. Finally, the complete algorithm was tested with Hardware-in-the-Loop simulations before testing it in the real hardware of the platform. The developed algorithm was not capable of estimating the center of mass with sufficient accuracy, which invalidated the obtained actuator positions, and thus was not able to compensate the offset of the center of mass. Recommended lines of development are provided to assist on the continuation of this work.
31
McCulloch, Scott D. "IDENTIFICATION AND CHARACTERIZATION OF MULTIPLE DNA LOOP REPAIR PATHWAYS IN HUMAN CELLS." UKnowledge, 2002. http://uknowledge.uky.edu/gradschool_diss/465.
Анотація:
The stability of DNA is a critical factor for several diseases, the most prevalent of which is cancer. Several neurodegenerative and accelerated aging diseases are also characterized by genomic instability. The number and complexity of DNA repair pathways that human cells possess underscores the importance of genomic stability. These pathways ensure that damaged DNA is repaired and that a cells complement of DNA remains stable upon cell division. How one particular type of DNA alteration, a DNA loop, is processed in human cells was the focus of this study. We have employed an in vitro system to study defined DNA loop substrates by human nuclear extracts. The influence of either a 5 or 3 nick, the range of loop sizes processed, and the role of DNA mismatch repair, DNA nucleotide excision repair, and the Werner Syndrome helicase proteins were variables tested. The results indicate tha t DNA loops containing between 5 to 12 nucleotides are processed in a strand - specific manner when either a 5 or 3 nick is present , with repair being targeted solely to the nicked strand . This repair occurs by both mismatch repair dependent and independent pathways. The processing of DNA loops containing 30 nucleotides in length is directed either by a 5 nick, or by the loop itself, but not by a 3 nick. The nick independent pathway results solely in loop removal. The large loop pathway is independent of mismatch repair, nucleotide excision repair, and the WRN helicase/exonuclease protein. Both of the 5 nick directed pathways occur by excision that initiates at the pre- existing nick and proceeds towards the loop along the shortest path between the nick and loop. DNA resynthesis occurs using either DNA polymerase , , or and also initiates at the pre-existing 5 nick. The 3 nick directed intermediate loop repair pathway proceeds in a similar fashion, likely after a nick is made 5 to the loop region on the strand that contained the pre-existing nick. DNA synthesis inhibition has only a minor affect on the nick independent loop removal pathway as only a short tract of DNA surrounding the loop site is processed. In total, the results point to at least 3 novel pathways that process DNA loops that likely contribute to total genomic stability.
32
Peake, R. W. A. "The functional role of selected human epidermal growth factor B-loop residues." Thesis, Queen's University Belfast, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.411367.
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Razeghi, Orod. "An investigation of a human in the loop approach to object recognition." Thesis, University of Nottingham, 2015. http://eprints.nottingham.ac.uk/29084/.
Анотація:
For several decades researchers around the globe have been avidly investigating practical solutions to the enduring problem of understanding visual content within an image. One might think of the quest as an effort to emulate human visual system. Despite all the endeavours, the simplest of visual tasks to us humans, such as optical segmentation of objects, remain a significant challenge for machines. In a few occasions where a computer's processing power is adequate to accomplish the task, the issue of public alienation towards autonomous solutions to critical applications remains unresolved. The principal purpose of this thesis is to propose innovative computer vision, machine learning, and pattern recognition techniques that exploit abstract knowledge of human beings in practical models using facile yet effective methodologies. High-level information provided by users in the decision making loop of such interactive systems enhances the efficacy of vision algorithms, whilst simultaneously machines reduce users' labour by filtering results and completing mundane tasks on their behalf. In this thesis, we initially draw a vivid picture of interactive approaches to vision tasks prior to scrutinising relevant aspects of human in the loop methodologies and highlighting their current shortcomings in object recognition applications. Our survey of literature unveils that the difficulty in harnessing users' abstract knowledge is amongst major complications of human in the loop algorithms. We therefore propose two novel methodologies to capture and model such high-level sources of information. One solution builds innovative textual descriptors that are compatible with discriminative classifiers. The other is based on the random naive Bayes algorithm and is suitable for generative classification frameworks. We further investigate the infamous problem of fusing images' low-level and users' high-level information sources. Our next contribution is therefore a novel random forest based human in the loop framework that efficiently fuses visual features of images with user provided information for fast predictions and a superior classification performance. User abstract knowledge in this method is harnessed in shape of user's answers to perceptual questions about images. In contrast to generative Bayesian frameworks, this is a direct discriminative approach that enables information source fusion in the preliminary stages of the prediction process. We subsequently reveal inventive generative frameworks that model each source of information individually and determine the most effective for the purpose of class label prediction. We propose two innovative and intelligent human in the loop fusion algorithms. Our first algorithm is a modified naive Bayes greedy technique, while our second solution is based on a feedforward neural network. Through experiments on a variety of datasets, we show that our novel intelligent fusion methods of information source selection outperform their competitors in tasks of fine-grained visual categorisation. We additionally present methodologies to reduce unnecessary human involvement in mundane tasks by only focusing on cases where their invaluable abstract knowledge is of utter importance. Our proposed algorithm is based on information theory and recent image annotation techniques. It determines the most efficient sequence of information to obtain from humans involved in the decision making loop, in order to minimise their unnecessary engagement in routine tasks. This approach allows them to be concerned with more abstract functions instead. Our experimental results reveal faster achievement of peak performance in contrast to alternative random ranking systems. Our final major contribution in this thesis is a novel remedy for the curse of dimensionality in pattern recognition problems. It is theoretically based on mutual information and Fano's inequality. Our approach separates the most discriminative descriptors and has the capability to enhance the accuracy of classification algorithms. The process of selecting a subset of relevant features is vital for designing robust human in the loop vision models. Our selection techniques eliminate redundant and irrelevant visual and textual features, and therefore its influence on improvement of various human in the loop algorithms proves to be fundamental in our experiments.
34
Mullin, M. J. "Combinatorial studies on the B-loop residues of human epidermal growth factor." Thesis, Queen's University Belfast, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273233.
35
Tomaro, Emiliano. "Simulations and automated tests of battery management system control strategies and diagnosis on hardware in the loop system." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/19241/.
Анотація:
The aim of this master’s degree thesis is to describe the activities performed during a four months internship in Magneti Marelli Powertrain, Bologna. The role I covered in this period was Validation Engineer for Hybrid & Electric systems in Hardware in the Loop (HIL) environment, the main activity was to develop automated tests in python involving software and control strategies.
A first focus of this thesis is on the Battery Management System functionalities, Hardware in the Loop system and Test Automation.
The second part of the thesis describes the experimental activity of the interniship: the development of a cells' emulator in order to simulate battery packs in HIL environment.
36
Yuan, Tingting, and 袁婷婷. "Identification of intermediate antibodies of broadly neutralizing HIV-1 human monoclonal antibody b12 and characterization of variable loops of HIV-1 envelop glycoprotein." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/196445.
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Evers, Christoph [Verfasser]. "The Human in the Loop: User Participation in Self-Adaptive Software / Christoph Evers." Kassel : Universitätsbibliothek Kassel, 2014. http://d-nb.info/1059429853/34.
38
Matsuda, Yuki [Verfasser]. "Study on human-in-the-loop sensing in urban environment analysis / Yuki Matsuda." Ulm : Universität Ulm, 2019. http://d-nb.info/1197131949/34.
39
Pataranutaporn, Pat. "Wearable Lab and BioFab on body : towards closed-loop bio-digital human augmentation." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/130604.
Анотація:
Thesis: S.M., Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, September, 2020Cataloged from the official PDF version of thesis.
Includes bibliographical references.
We explore the vision of closed-loop bio-digital interfaces for human augmentation, where the bio-digital system allows for both sensing and writing biological information to the body. Current-generation wearable devices sense an individual's physiological data such as heart rate, respiration, electrodermal activity, and EEG, but lack in sensing their biological counterparts, which drive the majority of individual's physiological signals. On the other hand, biosensors for detecting biochemical markers are currently limited to one-time use, are non-continuous and don't provide flexibility in choosing which biomarker they sense. We believe that the future for wearable biosensors lies in going beyond specific sensing capabilities and becoming a wearable "lab" on body, where a small device can offer a fully integrated and re-configurable system that mimics several processes usually performed in the laboratory for clinical diagnostics and analysis of human health. To illustrate our vision of having a lab on body, we prototyped "Wearable Lab" a bio-digital platform for sensing biochemical and digital data from saliva. Our platform contains digital sensors such as an IMU for activity recognition, as well as an automated system for continuous sampling of biomarkers from saliva by leveraging existing paper-based biochemical sensors. The platform could aid with longitudinal studies of biomarkers and early diagnosis of diseases. We present example data collected from the device, show a preliminary evaluation, and discuss the limitation of our platform.
by Pat Pataranutaporn.
S.M.
S.M. Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences
40
Rydell, Christopher. "Deep Learning for Whole Slide Image Cytology : A Human-in-the-Loop Approach." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-450356.
Анотація:
With cancer being one of the leading causes of death globally, and with oral cancers being among the most common types of cancer, it is of interest to conduct large-scale oral cancer screening among the general population. Deep Learning can be used to make this possible despite the medical expertise required for early detection of oral cancers. A bottleneck of Deep Learning is the large amount of data required to train a good model. This project investigates two topics: certainty calibration, which aims to make a machine learning model produce more reliable predictions, and Active Learning, which aims to reduce the amount of data that needs to be labeled for Deep Learning to be effective. In the investigation of certainty calibration, five different methods are compared, and the best method is found to be Dirichlet calibration. The Active Learning investigation studies a single method, Cost-Effective Active Learning, but it is found to produce poor results with the given experiment setting. These two topics inspire the further development of the cytological annotation tool CytoBrowser, which is designed with oral cancer data labeling in mind. The proposedevolution integrates into the existing tool a Deep Learning-assisted annotation workflow that supports multiple users.
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Rao, Sughosh J. "Development of a Hardware in the Loop Simulation System for Heavy Truck ESC Evaluation and Trailer Parameter and State Estimation." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1374154113.
42
Muñoz, Jadán Alexis Yanira. "Emulación de un aerogenerador conectado a la red a través de un sistema experimental Back-to-Back mediante la técnica "Hardware In The Loop"." Tesis, Universidad de Chile, 2016. http://repositorio.uchile.cl/handle/2250/143852.
Анотація:
Magíster en Ciencias de la Ingeniería, Mención EléctricaEn la actualidad, el estudio de generación de electricidad por medio del recurso eólico es de gran importancia, por presentarse como solución para disminuir la contaminación ambiental al reemplazar los sistemas eléctricos a base de generación convencional por energía limpia. También, por constituir una vía de desarrollo para la sociedad al comunicarlo con la tecnología del mundo moderno. Sin embargo, debido a las dificultades que existen para realizar investigaciones de energía eólica con generadores reales, es necesario implementar prototipos que sean capaces de emular, aerogeneradores que serán utilizados en el trabajo de laboratorio. En este trabajo, mediante la técnica Hardware in the Loop , se logra en base a datos reales, emular el comportamiento de una turbina eólica en la plataforma de desarrollo Matlab/Simulink a través del sistema embebido que constituye el conversor de potencia en configuración Back-To-Back contenido en la unidad Triphase PM5F60R. Considerando perfiles de viento de distinta variabilidad con distintos valores medios y con un nivel de detalle adecuado de ingeniería, se estudia el desempeño de los sistemas de control correspondientes al aerogenerador, como: Pitch control y el algoritmo MPPT. En los cuáles se efectúan cambios en algunos parámetros importantes que caracterizan a las turbinas eólicas tales como: inercia, radio del aspa, curva aerodinámica, entre otros. Por otro lado, por medio de estrategias de control de corriente, basadas en múltiples controladores resonantes y amortiguamiento activo se logra compensar las resonancias causadas por los filtros LCL, inyectar corrientes con baja distorsión armónica y entregar potencia activa y reactiva variable a la red. Es así que, en este trabajo se identifican principalmente los siguientes aportes: Debido a que los aerogeneradores varían según su capacidad y modelo; mediante la técnica Hardware In The Loop ; se logra la emulación del aerogenerador y evita el uso de un aerogenerador real, otorgando flexibilidad en el diseño del mismo y su control. Así también, las estrategias de control de corriente por medio de controladores resonantes y metodología Active Damping, permite inyección de corriente a la red con baja distorsión armónica. Finalmente, la plataforma experimental implementada logra presentar un escenario cercano a la realidad de un sistema de generación eólica con conexión a la red por medio de un interface de electrónica de potencia. Su importancia radica debido a la validación de los resultados experimentales, en la habilidad para testear cada uno de los componentes que conforman el sistema implementado y realizar futuras investigaciones a cada uno de ellos de manera rigurosa. Así como también, es objeto de integración a otros sistemas, como por ejemplo, al de una micro-red en operación modo isla y modo red por medio de Droop Control.
43
Livianu, Mathew Joseph. "Human-in-the-loop neural network control of a planetary rover on harsh terrain." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26576.
Анотація:
Thesis (M. S.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2009.Committee Chair: Dr. Ayanna Howard; Committee Member: Dr. Patricio Vela; Committee Member: Dr. Yoria Wardi. Part of the SMARTech Electronic Thesis and Dissertation Collection.
44
Pereira, Renato Augusto da Cunha. "Closed loop safety improvement system applied to human factors in aircraft maintenance and inspection." Instituto Tecnológico de Aeronáutica, 2004. http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=650.
Анотація:
The present work proposes a method for safety improvement, with emphasis in human factors in the aviation environment. The method consists of step-by-step actions, which demand active participation of the staff of the related area(s), including management. The proposed methodology is based on two models. One model consists of a proactive analysis of the system's "defenses" against human causal factors, which permits as well the detection of latent failures inherent to this system. The other model, widely used in safety assessment, permits the analysis of an occurred event through the modeling of the causal path leading to it. The methodology is then turned to a practical application at EMBRAER, on the tasks of assembly, maintenance and inspection involving pitch trim systems of the EMB 145 aircraft family, and on a case study of a related event. The method and its tools showed themselves useful to promote a critical analysis of the system and the organization from a safety point-of-view, allowing consistent and directed improvements in safety. Closed Loop Safety Improvement System Applied to Human Factors in Aircraft Maintenance and Inspection
45
Schmitz, Michael Glenn. "Key Tension Points of creative Machine Learning applications keeping a Human-in-the-Loop." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-264570.
Анотація:
Machine learning (ML) and artificial intelligence (AI), might have earlier primarily found industrial use, improving production chains, efficiency and the like but are now an integral part of private and commercial application. Many systems are using, or are claiming to use, machine learning to improve the end user's experience. This study aims to explore applications that are using creative ML, in which output might have a plethora of solutions instead of a single correct one. More specifically the focus is to evaluate which Key Tension Points, central lesser components of a complex and bigger issue, arise for researchers, designers and users coming into contact with this technology. The goal is to draw upon these Key Tension Points and attempt to frame guidelines which researchers and designers can use to further their understanding of the relationship between ML and design and how they can be accounted for to build and develop better application. The study found that these tension points (Impersonality, passive consumers & transparency) vary considerably depending on the application and presents how designers can account for them.Maskininlärning (ML) och artificiell intelligens (AI) har sedan tidigare oftast använts på en industriell skala, för att effektivisera produktionskedjor eller förfina dessa. Dock har det skett ett skifte och nuförtiden är ML en betydande del i applikationer som har privatpersoner som målgrupp. Den här studien undersöker kreativa maskininlärningslösningar, sådana som kommer med fler än ett förslag. Mer specifikt så undersöker den här studien vilka Key Tension Points, dvs. betydande mindre komponenter av komplexa stora problem, som forskare, designers eller användare kommer i kontakt med. Målet är att ta fram Key Tension Points och sedan undersöka huruvida riktlinjer kan formuleras som underlättar för forskare och designers att hantera frågor rörande design och tillgänglighet av ML. Dessutom underlättar användandet av Key Tension Points vid byggandet och utvecklingen av kreativa ML applikationer. Studien fann att Key Tension Points varierar betydande beroende på vilken typ av applikation som används av konsumenten.
46
Ostheimer, Julia. "Human-in-the-loop Computing : Design Principles for Machine Learning Algorithms of Hybrid Intelligence." Thesis, Linnéuniversitetet, Institutionen för informatik (IK), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-94051.
Анотація:
Artificial intelligence (AI) is revolutionizing contemporary industries and being applied in application domains ranging from recommendation systems to self-driving cars. In scenarios in which humans are interacting with an AI, inaccurate algorithms could lead to human mistreatment or even harmful events. Human-in-the-loop computing is a machine learning approach desiring hybrid intelligence, the combination of human and machine intelligence, to achieve accurate and interpretable results. This thesis applies human-in-the-loop computing in a Design Science Research project with a Swedish manufacturing company to make operational processes more efficient. The thesis aims to investigate emerging design principles useful for designing machine learning algorithms of hybrid intelligence. Hereby, the thesis has two key contributions: First, a theoretical framework is built that comprises general design knowledge originating from Information Systems (IS) research. Second, the analysis of empirical findings leads to the review of general IS design principles and to the formulation of useful design principles for human-in-the-loop computing. Whereas the principle of AI-readiness improves the likelihood of strategical AI success, the principle of hybrid intelligence shows how useful it can be to trigger a demand for human-in-the-loop computing in involved stakeholders. The principle of use case-marketing might help designers to promote the customer benefits of applying human-in-the-loop computing in a research setting. By utilizing the principle of power relationship and the principle of human-AI trust, designers can demonstrate the humans’ power over AI and build a trusting human-machine relationship. Future research is encouraged to extend and specify the formulated design principles and employ human-in-the-loop computing in different research settings. With regard to technological advancements in brain-machine interfaces, human-in-the-loop computing might even become much more critical in the future.
47
Zhang, Xingye. "A SUBSYSTEM IDENTIFICATION APPROACH TO MODELING HUMAN CONTROL BEHAVIOR AND STUDYING HUMAN LEARNING." UKnowledge, 2015. http://uknowledge.uky.edu/me_etds/70.
Анотація:
Humans learn to interact with many complex dynamic systems such as helicopters, bicycles, and automobiles. This dissertation develops a subsystem identification method to model the control strategies that human subjects use in experiments where they interact with dynamic systems. This work provides new results on the control strategies that humans learn.
We present a novel subsystem identification algorithm, which can identify unknown linear time-invariant feedback and feedforward subsystems interconnected with a known linear time-invariant subsystem. These subsystem identification algorithms are analyzed in the cases of noiseless and noisy data.
We present results from human-in-the-loop experiments, where human subjects in- teract with a dynamic system multiple times over several days. Each subject’s control behavior is assumed to have feedforward (or anticipatory) and feedback (or reactive) components, and is modeled using experimental data and the new subsystem identifi- cation algorithms. The best-fit models of the subjects’ behavior suggest that humans learn to control dynamic systems by approximating the inverse of the dynamic system in feedforward. This observation supports the internal model hypothesis in neuro- science. We also examine the impact of system zeros on a human’s ability to control a dynamic system, and on the control strategies that humans employ.
48
Wu, Wenzhuo. "Charging time estimation and study of charging behavior for automotive Li-ion battery cells using a Matlab/Simulink model." Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-194490.
Анотація:
An accurate estimation of the charging time of an automotive traction battery is possible only with the knowledge of different parameters of the battery and the vehicle. If this information is not available to the driver, the full time needed for charging of the battery may have to be assessed only from experience. A long route planning and estimation of required service life of the vehicle are therefore only roughly possible. Furthermore, with a better knowledge of estimated charging time, better management of public charging stations and better utilization of charging equipment can be achieved. An algorithm based on Matlab/Simulink model is made in the present thesis to estimate the charging time of a Li-ion battery pack which consists of 32 cells with 40 Ah each, as well as to investigate the impact of different cell balancing methods and different charging strategies on charging process. The theoretical background of the battery and charging modelling is investigated and different battery models are compared to get the best trade-off between the model accuracy and computation complexity. In the end, an electrical equivalent circuit model from reference [1], consists of a series resistor and two ZARC elements, is chosen to represent the battery cell. The parameters of the equivalent circuit are updated according to the SOC, current and temperature changes during the charging process. The whole simulation model of the algorithm consists of a charging controller (implementing the charging strategy), cell balancing logic controller, and cell balancing hardware simulation circuit and battery cell models. Different balancing criteria: based on SOC (with PWM drive) and based on terminal voltage (with/without advance) are implemented in the cell balancing logic controller, as well as different balancing windows, to investigate their impact on charging time. As for charging strategy, traditional CCCV is investigated, further investigation is conducted into improved CCCV method. The impact of initial SOC, charging rate and aging factor on charging behavior are investigated as well. Experiment results are validated by the comparison of the results with the ones got from a Hardware-in-the-loop simulation system.En noggrann estimering av laddtiden hos batterier avsedda för traktionsapplikationer kräver kunskap kring batteriets och dess tillhörande laddsystems parametervärden. Utan tillgång till denna information kan laddtiden endast uppskattas från fordonsägarens tidigare erfarenheter vilket försvårar t.ex. ruttplanering. En estimering av laddtiden med tillräcklig noggrannhet kan även möjliggöra bättre utnyttjade av laddutrusting inklusive nyttjandet av publika laddstationer. I detta examensarbete har en algoritm, implementerad i Matlab/Simulink, för att estimera laddtiden hos ett litiumjonbatteripack bestående av 32 celler på vardera 40 Ah tagits fram. Med hjälp av modellen har olika laddstrategier och metoder för att balansera cellerna studerats. Ett antal olika batterimodeller har jämförts i termer av noggrannhet och krav på beräkningsprestanda. En elektriskt ekvivalent krets från referens [1], bestående av en serieresistans samt två ZARC-element, valdes slutligen för att representera battericellen. Den ekvivalenta kretsens parametrar uppdateras vid förändringar i SOC, ström och temperatur. Hela simuleringsmodellen består av en laddregulator (i vilken laddstrategin är implementerad), cellbalanseringregulator och modeller för cell och cellbalanseringens hårdvara. Ett antal metoder för att balanser cellerna har jämförts med hänsyn till påverkan på den resulterande laddtiden. En traditionell samt modifierad CCCV laddstrategi har implementerats och jämförts med avseende på variationer i inledande SOC, total laddtid samt åldring. Experimentella resultat från en hardware-in-the-loop simulering har använts för att delvis kunna verifiera de framtagna resultaten.
49
Seyyedmousavi, Seyyedalireza. "THE EFFECTS OF SYSTEM CHARACTERISTICS, REFERENCE COMMAND, AND COMMAND-FOLLOWING OBJECTIVES ON HUMAN-IN-THE-LOOP CONTROL BEHAVIOR." UKnowledge, 2019. https://uknowledge.uky.edu/me_etds/140.
Анотація:
Humans learn to interact with many complex physical systems. For example, humans learn to fly aircraft, operate drones, and drive automobiles. We present results from human-in-the-loop (HITL) experiments, where human subjects interact with dynamic systems while performing command-following tasks multiple times over a one-week period. We use a new subsystem identification (SSID) algorithm to estimate the control strategies (feedforward, feedforward delay, feedback, and feedback delay) that human subjects use during their trials. We use experimental and SSID results to examine the effects of system characteristics (e.g., system zeros, relative degree, system order, phase lag, time delay), reference command, and command-following objectives on humans command-following performance and on the control strategies that the humans learn. Results suggest that nonminimum-phase zeros, relative degree, phase lag, and time delay tend to make dynamic systems difficult for human to control. Subjects can generalize their control strategies from one task to another and use prediction of the reference command to improve their command-following performance. However, this dissertation also provides evidence that humans can learn to improve performance without prediction.
This dissertation also presents a new SSID algorithm to model the control strategies that human subjects use in HITL experiments where they interact with dynamic systems. This SSID algorithm uses a two-candidate-pool multi-convex-optimization approach to identify feedback-and-feedforward subsystems with time delay that are interconnected in closed loop with a known subsystem. This SSID method is used to analyze the human control behavior in the HITL experiments discussed above.
50
Brusamento, Donato. "Improving pattern recognition based myocontrol of prosthetic hands via user-in-the-loop." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.
Анотація:
Il controllo di mani protesiche basato su elettromiografia (EMG) ha le potenzialità di ristabilire funzioni motorie ai pazienti che hanno subito un’amputazione, migliorando sensibilimente la qualità della vita. Tuttavia rimangono problemi aperti nell’ottenere un controllo ricco di movimenti e stabile, fra cui la presenza del limb position effect.
La tesi si concentra nel cercare di ridurre questa causa di instabilità, proponendo una versione modificata dell’algoritmo Ridge Regression with Random Fourier Features, reso incrementale e arricchito di feedback all’utente. Questo approccio viene poi validato tramite un esperimento su 12 soggetti intatti, per verificare l’incremento di performance, e tramite un ulteriore studio pilota su un soggetto amputato, a seguito dell’adattamento del software ad una mano protesica in via di sviluppo.