Dissertations / Theses on the topic 'Automatic station'
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1
Emil, Estlind. "PLC Lab Station : Solution for Automatic Unloading of Paper Reels." Thesis, Mittuniversitetet, Avdelningen för elektronikkonstruktion, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-22652.
Abstract:
Automatic control of processes is a field that has evolved extensively over theyears to reduce downtime, improve quality and increase the productivity ofprocesses in manufacturing industries. ÅF Consult is a consult organization thatprovides industrial solutions worldwide. In order to test equipment andintroduce employees and students to control systems, a PLC based lab station isnecessary. The methodology used in the project is based on a literature study,followed by the solution approach and finally an evaluation. A DistributedControl System setup using a Siemens S7-300 and a Siemens S7-400 PLC hasbeen developed. The PLCs communicate using PROFIBUS DP. The station isdivided into two major parts: a conveyor belt with transportation functionalityand a robotic arm with pick-and-place functionality. The station is providedwith equipment similar to systems currently used in paper and pulp industries.Existing solutions for unloading of paper reels in the paper and pulp industriesare non-universal due to extra equipment like pre-installed rails in trailers. Anautomated solution for unloading using a robotic arm is therefore presented,designed to reduce paper reel handling and to have the possibility to unload toany trailer. The lab station is implemented according to ÅF Consults demandsof a portable, field related station. The low budget resulted in cheap equipmentthat lack accuracy, mainly resulting in issues relating to the ability to control therobotic arm properly. The unloading solution is emulated as a lab task on thestation, showing that a control setup similar to the lab station would be a goodapproach for a real implementation solution.
2
Gising, Andreas. "MALLS - Mobile Automatic Launch and Landing Station for VTOL UAVs." Thesis, Linköping University, Department of Electrical Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-15980.
Abstract:
The market for vertical takeoff and landing unmanned aerial vehicles, VTOL UAVs, is growing rapidly. To reciprocate the demand of VTOL UAVs in offshore applications, CybAero has developed a novel concept for landing on moving objects called MALLS, Mobile Automatic Launch and Landing Station. MALLS can tilt its helipad and is supposed to align to either the horizontal plane with an operator adjusted offset or to the helicopter skids. Doing so, eliminates the gyroscopic forces otherwise induced in the rotordisc as the helicopter is forced to change attitude when the skids align to the ground during landing or when standing on a jolting boat with the rotor spun up. This master’s thesis project is an attempt to get the concept of MALLS closer to a quarter scale implementation. The main focus lies on the development of the measurement methods for achieving the references needed by MALLS, the hori- zontal plane and the plane of the helicopter skids. The control of MALLS is also discussed. The measurement methods developed have been proved by tested implementations or simulations. The theories behind them contain among other things signal filtering, Kalman filtering, sensor fusion and search algorithms. The project have led to that the MALLS prototype can align its helipad to the horizontal plane and that a method for measuring the relative attitude between the helipad and the helicopter skids have been developed. Also suggestions for future improvements are presented.
3
Norberg, Johan. "PLC Lab Station : Simulating an Automatic Quality Control of Loaf Products." Thesis, Mittuniversitetet, Avdelningen för elektronikkonstruktion, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-22647.
4
Strangeways, I. C. "The development of an automatic weather station for use in arctic conditions." Thesis, University of Reading, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371441.
5
Molina, Araceli. "A new automatic base-station optimization algorithm for next generation cellular networks." Thesis, University of Bristol, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340269.
6
Kaiser, Julius A., and Fredrick W. Herold. "AUTONOMOUS GROUND STATION FOR SATELLITE COMMUNICATIONS." International Foundation for Telemetering, 1999. http://hdl.handle.net/10150/607306.
Abstract:
International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, NevadaEmployment of the retro-directive technique described in Reference 1 describes a totally Autonomous Ground Station providing hemispheric coverage and continuous tracking. This System establishes communications between the satellite and ground station without human intervention or moving parts. When a satellite is in view, the ground station beacon antenna, using CDMA, enables the desired satellite transmitter and directs its beam to the ground station. The ground station, using the satellite’s transmitted signal, directs it’s receive and transmit arrays to point the ground station beams to the satellite, establishing two-way communications. The process is automatic and provides continuous horizon to horizon tracking.
7
Hale, Jason Matthew. "An implementation of an AMPS digital base station with adaptive Automatic Gain Control." Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-08292008-063555/.
8
Reda, Adinew Amezene, and Damtie Bekele Bedada. "Accuracy analysis and Calibration of Total Station based on the Reflectorless Distance Measurement." Thesis, KTH, Geodesi och geoinformatik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-145749.
Abstract:
Abstract Reflectorless EDM technology uses phase measuring or pulsed lasers to measure targets of a reflective and non-reflective nature. Reflectorless distance measurement provides rapid measurement by saving time and labour for surveyors. However, the accuracy of these types of measurements is under question because of the variety of constraints that affect the measurement. This paper attempts to show the techniques of total station calibration and to investigate the possible sources of error in reflectorless distance measurement. As a result, the effects of different color targets and angle incidence on distance measurement were checked. The precision of reflectorless distance measurement also investigated. In addition, comparison was made for manual and automatic target recognition measurement. Further experiment was performed on how to calibrate the total station instrument and the performance of the instrument was checked by KTH-TSC software. The experiments were evaluated by taking the reflector reading as ‘true value’ to check the accuracy of reflectorless measurement. The effects of colour surfaces on distance measurement have no significant difference. Besides, the result shows that the error in distance increased as the angle of incidence in the target increases. The result also indicates that automatic target recognition mode is the most advisable technique for precise measurement. Finally, an optimal number of seven target points was found for the calculation of prism constant.Sammandrag Reflektorlös EDM-tekniken använder fas mätning eller pulsade lasrar för att mäta mål en reflekterande och icke-reflekterande karaktär. Reflektorlös avståndsmätning ger snabb mätning genom att spara tid och arbete för inspektörer. Emellertid är noggrannheten hos dessa typer av mätningar under fråga på grund av olika begränsningar som påverkar mätningen. Denna uppsats försöker visa de metoder för totalstation kalibrering och att undersöka eventuella felkällor i reflektorlös avståndsmätning. Som ett resultat var effekterna av olika färger mål och vinkel inverkan på avståndsmätning kontrolleras. Noggrannheten i reflektorlös avståndsmätning undersökt också. Dessutom gjordes jämförelse för manuell och automatisk måligenkännande mätning. Ytterligare experiment utfördes på hur man kalibrerar totalstationen instrumentet och prestanda instrumentet kontrollerades av KTH-TSC programvara. Experimenten utvärderades genom att reflektorn läsning som "sanna värdet" för att kontrollera riktigheten i reflektorlös mätning. Effekterna av färgytor på avståndsmätning har ingen signifikant skillnad. Dessutom visar resultatet felet i avståndet ökade infallsvinkeln i målet ökar. Resultatet visar också automatiskt måligenkännande läget är det mest lämpligt tekniken för exakt mätning. Slutligen ett optimalt antal av sju målpunkter hittades för beräkning av prismakonstanten.
9
Borri, Marta. "An Automatic Testing Equipment for SYS.5 Automotive SPICE tests on DC-DC converter." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.
Abstract:
The Automotive SPICE standard is an internationally recognized process quality standard designed to improve and determine the skill levels of each process. Since being a crucial component inside the electric vehicle, the 2kW DC-DC converter must be subjected to strict tests that assess the reliabilty and durability of the component and declare it ready for the market. This thesis discuss the design and software of an automatic testing station that allows to automatically execute all the functional tests needed for the system qualification test according to the SYS.5 SPICE Automotive process. The process is based on the interpretation and execution of test cases for monitoring some key variables for the verification of the correct behaviour of the hardware and firmware circuit blocks of the DC-DC converter. Some software components developed are described in details, such elements were written in LabVIEW during the months of the internship in collaboration with the software engineer in order to complete the software structure of the testing station. The development of this thesis is the result of a work in the form of an internship with the company CPF Automation s.r.l. which has been for almost ten years in collaborative projects with the research and development departments of companies that are part of the supply chain in the hybrid and electric vehicle sector.
10
Trimmel, Stefan. "Evaluation of Model-Based Testing on a Base Station Controller." Thesis, Linköping University, Department of Computer and Information Science, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-12059.
Abstract:
This master thesis investigates how well suited the model-based testing process is for testing a new feature of a Base Station Controller. In model-based testing the tester designs a behavioral model of the system under test, or some part of the system. This model is then given to a test generation tool that will analyze the model and produce interesting test cases. These test cases can either be run on the system in an automatic or manual way depending on what type of setup there is.
In this report it is suggested that the behavioral model should be produced in as early a stage as possible and that it should be a collaboration between the test team and the design team.
The advantages with the model-based testing process are a better overview of the test cases, the test cases are always up to date, it helps in finding errors or contradictions in requirements and it performs closer collaboration between the test team and the design team. The disadvantages with model-based testing process are that it introduces more sources where an error can occur. The behavioral model can have errors, the layer between the model and the generated test cases can have errors and the layer between the test cases and the system under test can have errors. This report also indicates that the time needed for testing will be longer compared with manual testing.
During the pilot, when a part of a new feature was tested, of this master thesis a test generation tool called Qtronic was used. This tool solves a very challenging task which is generating test cases from a general behavioral model and with a good result. This tool provides many good things but it also has its shortages. One of the biggest shortages is the debugging of the model for finding errors. This step is very time consuming because it requires that a test case generation is performed on the whole model. When there is a fault in the model then this test generation can take very long time, before the tool decides that it is impossible to cover the model.
Under the circumstances that the Qtronic tool is improved on varies issues suggested in the thesis, one of the most important issues is to do something about the long debugging time needed, then the next step can be to use model-based testing in a larger evaluation project at BSC Design, Ericsson.
11
Al-Shantaf, Abdulraouf O. "A Computer-Based Process Control System for a Target Station in a LINAC Facility." Thesis, University of North Texas, 1999. https://digital.library.unt.edu/ark:/67531/metadc278077/.
Abstract:
An event-driven, sequential, process control system was designed for International Isotopes, Inc., to automate and remotely control a target station at the company's linear accelerator facility. The designed system consisted of two major sections: a software program (virtual instrument), which was developed by LabVIEW, and a hardware interface (FieldPoint Modular Distributed I/O System by National Instrument), which had to be a pre-developed system that did not require customization. The designed virtual instrument was tested on a simulation model that mimed the target station. The result was a valid design.
12
Hrůza, Michal. "Návrh automatizace provozu linky na montáž funkční části pístového kompresoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241917.
Abstract:
The topic of this master’s thesis is the design of automation assembly station for the completion of part of KC88 compressor in Valeo company. The thesis contains the study of the existing conditions of the old station with operator, measure times and process flow. Based on the findings, the aim is to propose the best solution of workplace arrangement and to design construction solution of the main parts of the automatic assembly station. The result of this thesis is the design of the automatic station with a robot, transport systems, evaluation in terms of return investment and saving process time. The thesis also includes partial drawings and 3D documentation.
13
Nagy, Anca Maria. "Analyse et synthèse de multimodèles pour le diagnostic. Application à une station d'épuration." Phd thesis, Institut National Polytechnique de Lorraine - INPL, 2010. http://tel.archives-ouvertes.fr/tel-00555081.
Abstract:
Cette thèse traite de l'analyse et de la synthèse de multimodèles pour la simplification de modèles, l'estimation d'état et le diagnostic des systèmes non linéaires caractérisés par une ou plusieurs échelles de temps. Ces travaux visent, dans un premier temps, à développer une procédure systématique de transformation d'un système non-linéaire en le récrivant sous une forme multimodèle, en évitant quelques inconvénients majeurs : la transformation est réalisée sans perte d'information, le choix de différents points de fonctionnement n'est plus nécessaire, le choix de variables de prémisse est réalisé d'une façon systématique. De plus, la méthode offre le choix entre différents multimodèles. Ce degré de liberté sera utilisé pour faciliter les études de contrôlabilité, d'observabilité et d'analyse de stabilité. Dans un deuxième temps, l'obtention de la forme à perturbations singulières d'un système non linéaire est proposée, en éliminant quelques contraintes structurelles et en rendant l'identification et la séparation des échelles de temps indépendante de la structure du modèle. Dans un troisième temps, la synthèse de plusieurs observateurs robustes vis-à-vis des perturbations, des erreurs de modélisation et des entrées inconnues a été réalisée afin de reconstruire l'état et l'entrée inconnue du système. La difficulté de cette étude provient du fait que le multimodèle utilisé dépend de variables de prémisse non mesurables, situation qui n'est pas intensivement étudiée, alors qu'elle est naturellement issue de l'approche par transformation système non linéaire - multimodèle. Ensuite, le diagnostic de défauts de systèmes est réalisé au moyen de bancs d'observateur à entrées inconnues permettant la génération et la structuration de résidus indicateurs de défauts. Finalement, tous les travaux proposés sont appliqués au modèle d'une station d'épuration, Activated Sludge Model No.1, qui est largement utilisé dans le domaine du traitement des eaux usées.
14
Rakotondrabe, Micky. "Développement et Commande Modulaire d'une Station de Microassemblage." Phd thesis, Université de Franche-Comté, 2006. http://tel.archives-ouvertes.fr/tel-00147548.
Abstract:
Pour fabriquer des produits de petites tailles, appelés micro-produits, l'utilisation de systèmes de production de dimensions habituelles conduit à des problèmes difficile à surmonter : coûts d'investissement et de fonctionnement des outils de production et problèmes techniques à cause des éffets d'echelle. Il en résulte une situation non concurrentielle même pour des systèmes automatisés.La solution d'avenir consiste à disposer de systèmes de production dont les dimensions et les coûts sont en rapport avec les produits concernés : c'est le concept de micro-usine (microfactory).
L'objectif de cette thèse porte sur la conception et la commande d'une station de micromanipulation dédiée à une micro-usine. Afin d'assurer une flexibilité maximale à la micro-usine, nous proposons d'aborder la problématique de sa conception en développant à son maximum le concept de modularité. Il semble être une clé pour intégrer les spécificités d'un microsystème de production. Cette modularité doit se trouver au niveau de la commande, autant pour les tâches à réaliser que pour le pilotage de la station de micromanipulation.
15
Andersson, Malin, and Erica Erikson. "The Ability of Regional Climate Models to Simulate Weather Conditions on Nordenskiöldbreen, Svalbard." Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-354430.
Abstract:
In this project, we analyse the ability of two regional climate models to simulate meteorological conditions on Nordenskiöldbreen, a glacier in Svalbard. To do so, regional climate model output is compared with in situ measurements from an automatic weather station. Detailed information about the weather conditions on Nordenskiöldbreen is important for simulating the glacial mass balance in a changing climate. The parameters analysed were the following: temperature, air pressure, relative humidity, precipitation, cloud cover, wind speed and wind direction. The weather station did not measure all parameters, cloud cover was instead estimated through the incoming longwave radiation and temperature, while precipitation was calculated from snow depth. The results show that the models represent certain parameters better than others. Temperature, air pressure and wind speed and direction are found to be simulated with high precision. Poorest agreement is found for precipitation, which appears to be both difficult to simulate and observe. Relative humidity and cloud cover show average agreement with the station. The conclusion of the project is that the estimation of some of the parameters is satisfactory, while others are lacking. None of the models can be determined to have performed significantly better than the other.I det här projektet analyserades två regionala klimatmodellers förmåga att simulera meteorologiska förhållanden på Nordenskiöldbreen, en glaciär på Svalbard. Detta gjordes genom jämförelser av data från regionala klimatmodeller mot lokala mätningar från en automatisk väderstation. Detaljerad information om väderförhållandena på Nordenskiöldbreen är viktigt för att kunna simulera glaciärens massbalans i ett föränderligt klimat. Parametrarna som jämfördes var temperatur, lufttryck, relativ luftfuktighet, nederbörd, molntäcke samt vindhastighet och vindriktning. Stationen mätte inte alla parametrar, molntäcket uppskattades istället genom inkommande långvågig strålning och temperatur, medan nederbörd beräknades via snödjup. Resultatet visar att modellerna representerar vissa parametrar bättre än andra. Temperatur, lufttryck, vindhastighet och vindriktning simuleras med hög precision. Parametern med lägst samband är nederbörd, somverkar vara svår både att simulera och observera. Relativ luftfuktighet och molntäcke har ett medelmåttigt samband till stationen. Slutsatsen av projektet är att modellernas uppskattning av några parametrar är tillräckligt bra, medan andra är bristfälliga. Ingen av modellerna kan bedömas ha presterat signifikant bättre än den andra.
16
Rozehnalová, Magda. "Design totální stanice." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229357.
Abstract:
This diploma thesis presents a design solution of a total station. The proposal is processed especially with regard to technical, ergonomic and aesthetic requirements. The main inovation of the proposal lies in a complex ergonomic and aesthetic solution that better reflects modern trends in the field of surveying technology. In comparison to current designs of the device, new proposal of the total station perfectly integrates certain parts of the device, such as a control panel. Since it is a relatively small device, it is important to design all details properly, especially the form and arrangement of controls. The thesis also suggests a number of alternative solutions to particular problems. The proposal of a total station is suitable for various types of work and methods of surveying.
17
GUELTON, Kevin. "Estimation des caractéristiques du mouvement humain en station debout. Mise en œuvre d'observateurs flous sous forme descripteur." Phd thesis, Université de Valenciennes et du Hainaut-Cambresis, 2003. http://tel.archives-ouvertes.fr/tel-00007960.
Abstract:
La neurophysiologie et la biomécanique constituent deux approches complémentaires à la compréhension globale de la régulation posturale. Le corps humain est considéré comme un système mécanique poly-articulé régulé par le système nerveux central. Ses entrées sont les couples articulaires et ses sorties les positions des segments corporels. Au vu des stratégies posturales employées en station debout, un modèle non linéaire en double pendule inversé est adopté. Il dépend de paramètres pouvant être estimés par des tables anthropométriques standards. Pour ajuster le modèle à un individu particulier, un recuit simulé est utilisé. Les couples articulaires sont classiquement estimés par des techniques de dynamique inverse sensibles aux incertitudes de mesure. Une méthode alternative issue du domaine de l'automatique, basée l'utilisation d'observateurs à entrées inconnues, est proposée. L'étude d'une classe d'observateurs flous de type Takagi-Sugeno basés sur une forme descripteur est proposée. Les conditions de convergence sont obtenues par une fonction de Lyapunov quadratique et peuvent être conservatives. Quatre approches, admettant une écriture sous la forme de problèmes LMI ou BMI, sont alors proposées afin de relâcher ces conditions. La mise en œuvre d'un observateur flou à entrées inconnues dans le cas de l'homme en station debout est proposée. Les résultats obtenus sont confrontés à ceux des différentes approches de la dynamique inverse. L'observateur flou semble mieux adapté à l'estimation des caractéristiques du mouvement en station debout. De plus son caractère temps réel est souligné et conduit à de nombreuses perspectives en rééducation.
18
Feng, Quanhong. "Novel methods for 3-D semi-automatic mapping of fracture geometry at exposed rock faces." Doctoral thesis, Stockholm : Tekniska högsk, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3181.
19
Saberi, Atefeh. "Automatic outlier detection in automated water quality measurement stations." Master's thesis, Université Laval, 2015. http://hdl.handle.net/20.500.11794/25908.
Abstract:
Des stations de mesure de la qualité de l’eau sont utilisées pour mesurer la qualité de l'eau à haute fréquence. Pour une gestion efficace de ces mesures, la qualité des données doit être vérifiée. Dans une méthode univariée précédemment développée, des points aberrants et des fautes étaient détectés dans les données mesurées par ces stations en employant des modèles à lissage exponentiel pour prédire les données au moment suivant avec l’intervalle de confiance. Dans la présente étude, ne considérant que le cas univarié, la détection de points aberrants est améliorée par l’identification d’un modèle autorégressif à moyenne mobile sur une fenêtre mobile de données pour prédire la donnée au moment suivant. Les données de turbidité mesurées à l'entrée d'une station d'épuration municipale au Danemark sont utilisées comme étude de cas pour comparer la performance de l’utilisation des deux modèles. Les résultats montrent que le nouveau modèle permet de prédire la donnée au moment suivant avec plus de précision. De plus, l’inclusion du nouveau modèle dans la méthode univariée présente une performance satisfaisante pour la détection de points aberrants et des fautes dans les données de l'étude de cas.Water quality monitoring stations are used to measure water quality at high frequency. For effective data management, the quality of the data must be evaluated. In a previously developed univariate method both outliers and faults were detected in the data measured by these stations by using exponential smoothing models that give one-step ahead forecasts and their confidence intervals. In the present study, the outlier detection step of the univariate method is improved by identifying an auto-regressive moving average model for a moving window of data and forecasting one-step ahead. The turbidity data measured at the inlet of a municipal treatment plant in Denmark is used as case study to compare the performance of the use of the two models. The results show that the forecasts made by the new model are more accurate. Also, inclusion of the new forecasting model in the univariate method shows satisfactory performance for detecting outliers and faults in the case study data.
20
Eklund, Elin. "Cykeltidsoptimering av sjuaxligt robotsystem." Thesis, Linköping University, Department of Electrical Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2756.
Abstract:
This master thesis studies how much the cycle time, i.e. the time it takes for an industrial robot to perform a given task, can be reduced if an extra degree of freedom (DOF) is added to the robot system. The extra DOF consists of a linear track, which is supposed to be used in an optimal way. The problem has been studied using simulations in the robot simulation tool RobotStudio.
To be able to run an optimization in Matlab, with the RobotStudio simulation cycle time as the object function, communication between Matlab and RobotStudio has been set up with an interface written in Visual Basic. An algorithm has been developed to solve the problem. Two different optimization methods have been examined and compared.
The resulting algorithm has been applied to test cases. The results show that the cycle time in several cases can be reduced by 20-30 percent, if the movements along the track are optimized with the suggested method.
21
Tamadazte, Brahim. "Vision 3D et Commande par asservissements visuels pour la micromanipulation et le micro-assemblage de MEMS. Application à l'automatisation d'une station de micro-assemblage." Phd thesis, Besançon, 2009. http://www.theses.fr/2009BESA2018.
Abstract:
La manipulation et le micro-assemblage de composants de taille micrométrique (1 micron mètre à 1mm) afin de réaliser des microsystèmes posent énormément de problèmes. À cette échelle les composants sont quasiment invisibles à l'oeil nu et on constate une inversion de l'importante des forces: les forces surfaciques (capillarité, Van der Waals, électrostatiques,. . . ) deviennent prépondérantes par rapport aux forces volumiques (poids, inertie). Il est ainsi nécessaire et indispensable de mettre en œuvre des stratégies novatrices appropriées tant du point de vue de l'imagerie et de la vision que de la manipulation et de la commande pour la fabrication des microsystèmes. Le micro-assemblage comporte des tâches de micromanipulation (positionnement, prise, transfert, dépose,. . . ) ainsi que tâches plus complexes (orientation dans l'espace, insertion,. . . ). Nos travaux répondent clairement à ces attentes c'est-à-dire utiliser un système de vision (un microscope optique) pour automatiser des tâches simples de manipulation de microcomposants et des tâches plus complexes d'assemblage de MEMS. Plusieurs lois de commande ont été développées telles qu'un asservissement visuel 2D multi-échelle pour la manipulation et un asservissement visuel 3D pour l'assemblage. Pour les deux approches développées, la précision et la répétabilité obtenues sur les processus de manipulation et d'assemblage sont satisfaisantes. Cependant, avant toute chose, le système de vision doit être calibré pour atteindre de meilleures performances. Dans cet objectif, une méthode de calibrage multi-échelle de microscopes photoniques a été présentée et détaillée. À partir de l'étude des contraintes liées à l'utilisation de ce genre d'imageur, des techniques de vision 3D telles le depth-from-focus et le pose-from-focus ont été pensées et intégrées pour aboutir à une station de micro-assemblage entièrement automatiséeThe micromanipulation and the microassembly of microcomponents (1 micron metre to 1 mm) in order to produce microsystems are incredibly difficult. At this scale, components are almost not visible to the naked eye and there is a reversal of the importance of the forces: the surface forces (capillarity, Van der Waals, electrostatic. . . ) become predominate compared to volume forces (weight, inertia). It is thus necessary and essential to solve this problem to solve the problems to carry out innovative strategies appropriate to imaging system and vision techniques as well as to manipulation and control strategies. The microassembly involves micromanipulation tasks (positioning, pick, transfer, place. . . ) as weIl as more complex tasks (spatial orientation, insertion. . . ). Our work concerns the use of a vision system (optical microscope) in order to automate simple tasks of manipulating microcomponents and more complex tasks for MEMS assembly. Several control laws have been developed: 2D multi-scale image-based visual servoing for micromanipulation and pose-based visual servoing for 3D MEMS assembly. For both approaches developed, the accuracy and repeatability obtained in the process of handling and assembly are satisfactory. However, above all, the vision system must be calibrated for best performances. To do this, a multiple scale calibration method for calibrating photonic microscopes has been presented and detailed. From the study of the constraints related to the use of such imaging system, 3D vision techniques such as depth-from-focus and pose-from-focus has been developed and integrated to realize to the full-automation of a microassembly workcell
22
Šíbl, Josef. "Studie řízení plynulých materiálových toků s využitím značení produktů." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2009. http://www.nusl.cz/ntk/nusl-222051.
Abstract:
Introduce grauation work contains the detail characteristic of the marking of material elements incoming to store and work out from store. The main part of the work is aimed to shortening working time during material entry and work out from store. On ground ride out analyse has been suggested optimal soluti-on implementation marking of material elements into production company. Optimal type barcode has been designed and time schedule to implementation marking of material elements has been described. The technic-economical analysis proposed solution SAP console describing type and price component need to implementation this solution.
23
Clavel, Fanny. "Modélisation et contrôle d'un réfrigérateur cryogénique Application à la station 800W à 4.5K du CEA Grenoble." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00576608.
Abstract:
Cette thèse concerne le développement de nouvelles stratégies de contrôle d'unréfrigérateur cryogénique soumis à de fortes variations de charge thermique. De telles perturbationsvont se rencontrer lors du refroidissement des aimants supraconducteurs des futurs réacteurs defusion (tokamak JT-60SA par exemple).La modélisation d'un réfrigérateur de test, offrant une capacité de refroidissement de 800Wà 4.5K, a été effectuée sous le logiciel Matlab/Simulink. Celle-ci est basée sur les équationsthéoriques de la thermodynamique, de la thermique et de l'hydraulique et prend en compte lespropriétés non linéaire de l'hélium à basse température.A partir de ce modèle, une stratégie de contrôle multivariable a été proposée sur les deuxparties du réfrigérateur : la station de compression et la boîte froide. Les résultats expérimentauxmontrent de nettes améliorations et une plus grande stabilité du réfrigérateur en présence decharges pulsées par rapport à la stratégie initiale (PI).Un observateur de la charge thermique du bain d'hélium liquide a également été développé.Le modèle utilisé est construit par identification à partir de mesures internes au réfrigérateur. Ilpourrait servir comme outil de surveillance aux opérateurs.
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Boulkroune, Boulaïd. "Estimation de l'état des systèmes non linéaires à temps discret : Application à une station d'épuration." Phd thesis, Université Henri Poincaré - Nancy I, 2008. http://tel.archives-ouvertes.fr/tel-00347465.
Abstract:
Ce sujet de recherche revêt, d'une part, un caractère théorique puisqu'il aborde le problème d'estimation des systèmes singuliers linéaires et non linéaires à temps discret pour lesquels très peu de résultats sont disponibles et, d'autre part, un aspect pratique, car le modèle utilisé est d'une station d'épuration des eaux usées à boues activées. Dans la partie théorique, nous nous sommes intéressés, dans un premier temps, à l'estimation d'état des systèmes singuliers linéaires en utilisant l'approche d'estimation à horizon glissant. Deux estimateurs optimaux, au sens des moindres carrés et au sens de la variance minimale, ont été présentés. L'analyse de la convergence et de la stabilité de ces estimateurs est traités. Ensuite, nous avons présenté une approche pour l'observation de la classe des systèmes non linéaires lipschitziens à temps discret. En supposant que la partie linéaire de cette classe de systèmes est variante dans le temps, le problème de l'estimation d'état d'un système non linéaire est transformé en un problème d'estimation d'état d'un système LPV. La condition de stabilité de l'observateur proposé est exprimée en terme d'inégalités matricielles linéaires (LMI). Enfin, dans la partie pratique, les résultats obtenus sont validés par une application à un modèle d'une station d'épuration des eaux usées à boues activées.
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Rodrigues, Rafael Frank de. "Arduino como uma ferramenta mediadora no ensino de física." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/108542.
Abstract:
Esta dissertação apresenta uma atividade direcionada aos alunos do terceiro ano do Curso Técnico de Informática. A ideia foi utilizar microcontroladores, Arduino, como ferramenta mediadora no Ensino de Física. Para desenvolver esse procedimento foi considerado o desejo de trabalhar de forma motivadora, visando uma aprendizagem significativa guiada por descobertas, enfatizando o que o aluno conhece e não suas carências. O projeto apresenta uma estratégia de ensino embasada em teorias de formação social da mente e zona de desenvolvimento proximal abordados por Lev Vygotsky e de teoria de projetos propostos por Hernández.This dissertation utilizes an activity for students of the third year of Technical Computer Course activity. The idea was to use microcontrollers, Arduino with mediating tool in Physics Teaching. To develop this procedure was deemed a desire to work in a motivating way, targeting a significant learning motivated by findings with emphasizing what the student knows and not their shortcomings. The project presents a teaching strategy grounded in theories of social formation of mind, zone of proximal development Lev Vygotsky addressed by theory and projects proposed by Hernández.
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Tsukada, Manabu. "Gestion des communications dans les systèmes de transport intelligents coopératifs." Phd thesis, Ecole Nationale Supérieure des Mines de Paris, 2011. http://tel.archives-ouvertes.fr/tel-00706187.
Abstract:
Les systèmes de transport intelligents (STI) coopératifs sont des systèmes où les véhicules, l'infrastructure routière, les centres de contrôle de trafic et d'autres entités échangent des informations afin d'assurer une meilleure sécurité routière, l'efficacité du trafic et le confort des usagers de la route. Cet échange d'information doit s'appuyer sur une référence d'architecture de communication commune. C'est dans ce but que l'architecture de station STI a été spécifié par l'ISO et l'ETSI. Le concept de cette architecture de référence permet aux stations STI-véhicules et stations STI-infrastructure de s'organiser dans un réseau véhiculaire ad-hoc (VANET), tout en utilisant des protocoles de communication tels que GeoNetworking IPv6 et IEEE802.11p ainsi que toute autre technologie d'accès afin de se connecter de manière transparente à Internet. Plusieurs chemins peuvent donc être accessible à une station STI véhicule pour communiquer avec d'autres stations STI. Les chemins sont de trois types: le chemin direct, le chemin optimisé et le chemin d'ancré. L'objectif de cette étude est d'optimiser la communication entre stations STI en sélectionnant le meilleur chemin de communication disponible. Cela exige d'abord de recueillir les informations disponibles localement dans la station STI (la position, la vitesse, les exigences des applications, les caractéristiques des supports de communication, les capacités, l'état du chemin), ainsi que les informations des stations STI voisines (position, vitesse, services, etc.). Ces informations sont ensuite traitées par le biais d'un algorithme de prise de décision. Premièrement, nous définissons un module réseau qui permet la combinaison d'IPv6 avec le GeoNetworking. Deuxièmement, nous proposons un module de gestion inter-couches pour la sélection du meilleur chemin. Nos contributions s'intègrent dans l'architecture de station STI par la définition de la relation entre la couche réseau et transport (qui héberge la contribution GeoNetworking IPv6) et l'entité verticale de gestion inter-couches (qui accueille l'algorithme de décision pour la sélection de chemin). Nous avons spécifiés les fonctions permettant l'échange de paramètres par l'intermédiaire de le point d'accès au service (SAP) entre la couche réseau et l'entité de gestion (MN-SAP). Les paramètres utilisés dans l'entité de gestion inter-couches sont extraits d'une manière agnostique par rapport aux protocoles de la couche réseau et transport, ce qui permet de remplacer facilement les éléments d'une couche sans affecter les autres (par exemple, remplacer NEMO par une autre protocole de mobilité) et de permuter plusieurs piles réseau (on peut choisir d'utiliser la pile IPv6 ou bien la pile GeoNetworking, ou encore une combinaison des deux à la fois ou même une autre pile).
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Tharrault, Yvon. "Diagnostic de fonctionnement par analyse en composantes principales : application à une station de traitement des eaux usées." Phd thesis, Institut National Polytechnique de Lorraine - INPL, 2008. http://tel.archives-ouvertes.fr/tel-00364698.
Abstract:
L'objectif de cette thèse était de valider l'ensemble des informations délivrées par les capteurs utiles à la commande d'une station de traitement des eaux usées. Pour cela, nous avons utilisé l'analyse en composantes principales (ACP) pour effectuer la détection et localisation de défauts de capteurs de la station de traitement des eaux usées. Afin de construire un modèle ACP, nous avons eu recours à une matrice de données constituée de l'ensemble des mesures disponibles (obtenues lors du fonctionnement normal de la station de traitement des eaux usées) dans l'installation. Cependant, afin d'appliquer l'ACP, nous avons rencontré plusieurs difficultés :1. Présence dans les données de valeurs aberrantes (valeurs obtenues durant des périodes de démarrage, d'arrêt, de fonctionnement dégradé, erreurs de mesure, ...) perturbant la construction d'un modèle ACP.
2. Présence de défauts multiples, ce qui entraîne une explosion combinatoire des scénarii de défauts à considérer.
Afin de résoudre le premier point, nous nous sommes intéressé aux variantes robustes de l'ACP. L'estimateur robuste MCD (Minimum Covariance Determinant), méthode de référence pour ses performances, nécessite un temps de calcul important, et une connaissance a priori de la quantité de valeurs aberrantes présente dans les données (inconnue). C'est la raison pour laquelle nous avons proposé une nouvelle méthode robuste, basée sur l'utilisation de MM-estimateur, nommée MMRPCA (MM-estimator Robust Principal Component Analysis). Concernant le point 2, une méthode d'analyse du modèle en terme de capacité de détection et de localisation a été appliquée afin de réduire le nombre de défauts à considérer. Les différentes méthodes développées ont été menées avec succès afin de valider les mesures issues des différents capteurs de la station d'épuration des eaux usées.
28
Abrahamson, Scott. "Automated psycho-acoustic experimental station." Thesis, Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/19566.
29
Thorin, Elin. "Effektivisering av en halvautomatisk monteringsstation för en vattenblandare : Nya sekvenser för byte av komponenter." Thesis, Mittuniversitetet, Institutionen för elektronikkonstruktion, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-39372.
Abstract:
Rapporten behandlar utveckling av en halvautomatisk monteringsstation för en elektronisk vattenblandare. Monteringsstationen roterar blandarhuset till vattenblandaren i olika positioner så att en operatör manuellt kan montera på komponenter på blandarhuset. Nya behov har uppmärksammats under tiden monteringsstationen varit i bruk och nya sekvenser för byte av redan monterade komponenter på en färdigmonterad produkt har tagits fram. Främst handlar behovet om att kunna byta en enskild komponent på en färdigmonterad produkt när det har visat sig att den monterade komponenten inte håller måttet i kontroller direkt efter monteringsprocessen. Kartläggning av aktuella sekvenser har gjorts genom observationer när monteringsstationen i varit i bruk. För att få fram nya optimerade sekvenser har behovet av förbättringar kartlagts genom att fråga produktionstekniker och operatörer i monteringen om upplevda problem och önskemål på förändringar i monteringsstationen för att underlätta monteringsarbetet och öka motivationen. Byte av en blandventil/termostatinsats på en redan monterad vägghängd Tronic-blandare är ett av de största upplevda problemen vid monteringsstationen. En ny tidsoptimerad sekvens för byte av blandventil/termostatinsats i monteringsstationen har tagits fram som innebär att monteringsstationen kommer användas i 5 steg istället för i 10 steg som i gamla monteringssekvensen. Arbetet har även uppmärksammat vikten av att ha tillgång till aktuell programmering och dokumentation för maskiner/stationer som används i produktionen på företaget.The report deals with the development of a semi-automatic assembly station for an electronic water mixer. The assembly station rotates the mixer housing in various positions for the operator to be able to manually assemble components on the mixer housing. The operators have identified that alternate sequences in the assembly station might improve the assembly process. New sequences for replacing already assembled components on the assembled mixer product have been developed. The main need is to be able to change a single component on an already assembled mixer product when the component has been shown not to meet the quality standards. Mapping of current sequences has been done through observations when the assembly station has been in use. To obtain new optimized sequences the need for improvements has been mapped by asking production technicians and operators in the assembly about perceived problems and wishes for changes in in the assembly station to ease the assembly work and increase motivation. Replacing a mixing valve/thermostat insert on an already assembled wall-mounted Tronic mixer is one of the biggest problems experienced at the assembly station. A new time-optimized sequence for replacing the mixing valve/thermostat insert in the assembly station has been developed. The new sequence in the assembly station will use 5 steps to finish the change instead of 10 steps as in the old sequence. The report has also highlighted the importance of having access to up-to-date programming, and documentation for machines/stations used in the production line at the company.
30
Shah, Naresh Harkishan. "Automated station-keeping for satellite constellations." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/10514.
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Finholdt, Gustavo. "Desenvolvimento e avaliação de uma estação meteorológica automática para manejo de irrigação." Universidade Federal de Viçosa, 2008. http://locus.ufv.br/handle/123456789/3538.
Abstract:
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Previous issue date: 2008-07-29Conselho Nacional de Desenvolvimento Científico e Tecnológico
Due to the increasing world population growth, irrigated agriculture is an important strategy to increase food, fiber and agro-energy production. Because of its operationality, irrigation levels determination by means of culture evapotranspiration studies (ETc) has been a widely disseminated and applied technology. Thus, it is necessary to determine a reference evapotranspiration (ETo), which is obtained through data supplied by the Automatic Meteorological Stations (AMS), based on the FAO Penman- Monteith equation, which has a great potential of reducing water consumption and electric energy in irrigation, in addition to reducing potential environmental degradation and labor use. However, the automatic stations are normally imported technologies, with high cost and maintenance, also presenting difficulties in access to maintenance, which is deficient and scarce. Thus, an Automatic Meteorological Station was developed using national technology, designed with five basic sensors (wind velocity, rainfall, air relative humidity, solar irradiance and ambient temperature) to calculate water balance, based on two main parameters: rainfall and ETo. The equipment developed allows data visualization in the equipment itself or in a microcomputer. After the equipment was developed, the sensors were calibrated reaching correlation coefficients (r) of 1,000; 0,998; 0,999; 0,995; and 1,000 for the wind, rainfall, air relative humidity, radiation and temperature sensors, respectively. The equipment was evaluated from 05/17/2008 to 06/12/ 2008 at the meteorological station of the National Instituteof Meteorology (INMET) installed on the Universidade Federal de Viçosa campus. The data were compared taking as reference the INMET s EMA data, model MAWS301 (manufacturer, Vaisala), installed close to the equipment developed. The correlation coefficient estimates (r), mean bias error (MBE) and Root Mean Square Error (RMSE) were used to evaluate the equipment at work. Comparing the equipment data, the following correlation coefficients were obtained: 0.911; 0.999; 0.993; 0.998; and 0.987 of the sensors anemometer, pluviometer, hygrometer, pyranometer and thermometer, respectively. It was concluded that the sensors developed provided adequate results and that the automatic meteorological station developed presented reliable meteorological data measuring and storing conditions.
Devido ao crescente aumento populacional mundial, a agricultura irrigada é uma importante estratégia para maior produção de alimentos, fibras e agroenergia. A determinação da lâmina de irrigação por meio de estudos da evapotranspiração da cultura (ETc) tem sido uma tecnologia amplamente divulgada e utilizada em razão da sua operacionalidade. Para tal, é necessário que se determine a evapotranspiração de referência (ETo) que é obtida com dados advindos de Estações Meteorológicas Automáticas (EMA), com base na equação FAO Penman-Monteith, que tem grande potencial de redução no consumo da água e da energia elétrica nas irrigações, além de reduzir o potencial de degradação ambiental e de utilização da mão-de-obra. No entanto, as estações automáticas são tecnologias normalmente importadas, com alto custo de aquisição e manutenção, que apresentam ainda dificuldades de acesso aos serviços de manutenção, deficientes e pouco disponíveis. Dessa forma, desenvolveu-se uma Estação Meteorológica Automática com tecnologia nacional. A estação foi projetada com os cinco sensores básicos (velocidade do vento, precipitação, umidade relativa do ar, irradiância solar e temperatura ambiente) para calcular o balanço hídrico, sendo dois parâmetros importantes: a precipitação pluvial e a ETo. O equipamento desenvolvido possibilita a visualização dos dados no próprio equipamento ou em um microcomputador. Após o desenvolvimento do equipamento, realizou-se a calibração dos sensores, atingindo coeficientes de correlação (r) de 1,000; 0,998; 0,999; 0,995; e 1,000, para os sensores de vento, chuva, umidade relativa, radiação e temperatura, respectivamente. Em seguida, avaliou-se o equipamento no período de 17/05 a 12/06/2008, na estação meteorológica do Instituto Nacional de Meteorologia (INMET) instalada no campus da Universidade Federal de Viçosa. Os dados foram comparados tomando-se como referência os dados da EMA do INMET, modelo MAWS301 (fabricante Vaisala), instalada ao lado do equipamento desenvolvido. As estimativas de coeficiente de correlação (r), erro de viés médio (MBE) e raiz do erro quadrático médio (RMSE) foram utilizadas para avaliar o funcionamento do equipamento. Com a comparação dos dados dos equipamentos, obtiveram-se os seguintes coeficientes de correlação: 0,911; 0,999; 0,993; 0,998; e 0,987, respectivamente dos sensores anemômetro, pluviômetro, higrômetro, piranômetro e termômetro. Conclui- se que os sensores desenvolvidos proporcionaram resultados adequados e a estação meteorológica automática apresentou condições confiáveis de medição e armazenamento dos dados meteorológicos.
32
Sollie, Vincent, and Johannes Malmström. "Automation of refilling station in clean room." Thesis, Uppsala universitet, Elektricitetslära, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-386477.
Abstract:
This thesis aims to confirm a proof of concept on how to get a robot to pick up a plastic bag containing 3500 plastic caps, cut it open and pour the content, all within a restricted Clean room. The work was executed in an agile way with several ongoing iterative processes in parallel. In the present production line, refilling caps are done manually. For those working in the production line, this task entails heavy lifting and the concern of keeping an eye out for when to refill and how many caps there are in the production line all the time. The result is a working prototype of a robot tool, consisting of a combined clamp and vaccum bag gripper and a self standing linear unit with a blade mounted to it. When tested, this proved to be a functioning solution to the task in hand. The gripper is designed to be mounted on a six axis industrial robot and the blade is placed inside a robot cell. Simulations show that the task is easily done fast enough to supply 5 production lines, producing in full speed,with caps. Solely this unit will not contribute much to a production line if implemented in a factory, since it does not take material flow into consideration. It can merely be seen as a part of a bigger automation chain.
33
Martin, Kamalini. "THE TELEMETRY TEST STATION - AN INTRODUCTION." International Foundation for Telemetering, 1991. http://hdl.handle.net/10150/613119.
Abstract:
International Telemetering Conference Proceedings / November 04-07, 1991 / Riviera Hotel and Convention Center, Las Vegas, NevadaThe Telemetry Test Station has been developed at the Digital Systems Division, ISRO Satellite Centre, to test House Keeping Telemetry Packages which will be flown onboard satellites. The main feature of the Test Staion is its configurability, since it is intended to be used with different types of (low bit rate) telemetry packages. Other features include automation of test procedure, and reduction in testing time/increase in repeatability due to minimisation of manual interaction. Since the test station comprises GPIB controlled equipment, hardware and software, thf configurability should be built in at all levels and stages, from design to implementation. Thus since the specification is subject to change, the configuration for structure of the system is traosferred from the designer to the user. This results in a large part of the system being devoted to user interface design, since the computer which is an integral part of the setup must be ‘invisible’ to the user. Due to specialised requirements the user and the system are treated at peer level i.e, at any time during the entire test session, the user can override system process and verify/correct it and equally, the system must also verify/correct user input especially with regard to critical test procedures. The test tession itself (after configuration) is divided into three equally important sections: preprocessing, test and analysis. All the data required during the test run should be made ready before the actual test. Since it has been found by experience that this is not always convenient, the preprocessing software is integrated in to the test session so that the user can perform this at any time. Similarly, the results of the test can also be analysed immediately or even during the test to improve subsequent procedures. This paper describes the prototype telemetry test station which has been built and tested over the past two years. This performance has been satisfactory. The system integration features and design problems and solution are high lighted.
34
Hassan, Ahmad, and Ahsanul Hoque. "Automated Microwave Antenna Alignment of Base Transceiver Station." Thesis, Karlstads universitet, Fakulteten för ekonomi, kommunikation och IT, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-11884.
Abstract:
This master’s thesis is intended for the solution of Microwave (MW) link alignment which has several applications in modern communication systems. MW communication is used for point to point links with small wavelength and simultaneously compact antenna dimensions. Assuring the automated alignment of antennas provides a better communication between switching stations and allow its subscribers to communicate ceaselessly. In the first part of the work; effects of downtime on a network are discussed and at later stage a mechanism is investigated which will reduce the downtime. MW antenna used in communication systems is regularly affected by environmental factor and generally by wear and tear of mounts. These factors cause the precisely directed antennas to be perturbed from respective main lobes. Larger antennas with narrow main lobes require more sophisticated designing while smaller antennas have a broader main lobe. An automated antenna alignment that works without human intervention can decrease the down time and ensure a reliable communication between the near end and far end terminals of the Base Transceiver Station (BTS). The focus has been laid on a system that works autonomously and for that LabVIEW design and RCX Robonics Kit is used. Results are presented to indicate antenna alignment in automatically synchronized manner.
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Czíria, Kornél. "Měření posunů a přetvoření mostu Gagarin." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-390178.
Abstract:
The work deals with a complex analysis of displacements and deformations of one bridge span of the railway bridge "Gagarin". The bridge structure was since 2009 annually measured. In addition to long-term monitoring of the bridge a 24-hour automatized monitoring was conducted in 2015 using robotic total station. The results of monitoring enables the analysis of displacements and deformations, analysis of measurement accuracy and also environmental influences on the structure - determination of the temperature dependence of deformations. Another part of the work is evaluating the long-term stability of the height reference frame that was used for geodetic epoch measuring of the bridge columns. The results of the work are the values of detected displacements and deformations, their graphical illustration, geometric interpretation and relevant characteristics of accuracy.
36
Eng, Chun Heong. "Design and development of an automated demodulator calibration station." Thesis, Monterey, California : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/theses/2009/Dec/09Dec%5FEng.pdf.
Abstract:
Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, December 2009.Thesis Advisor(s): Jenn, David C. Second Reader: Pace, Phillip E. "December 2009." Description based on title screen as viewed on January 28, 2010. Author(s) subject terms: Direct conversion, homodyne, IQ mismatch, DC offsets, IQ circle, phase error, modulator, demodulator calibration, LabVIEW, Directional Finding (DF), digital beamforming, Robust Symmetrical Number System (RSNS). Includes bibliographical references (p. 73-75). Also available in print.
37
Graham, John A. "Automatic seal control in regenerative air preheaters in power stations." Thesis, Queen's University Belfast, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329557.
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Ullal, Pratheek. "Development of Fluidity Measurement Technique and Automation of Measurement Station : Developing the existing Fluidity Measurement Station by automating the operation and measuring the fluidity digitally with MATLAB Image Processing Tools." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Konstruktion och produktutveckling, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-45288.
Abstract:
Bryne AB has invented a device called Loop for measuring the fluidity of molten metal. Loop is made up of refractory fiber material and has a dimension of 196 sq.mm within which there is an engraved spiral shaped runway for the molten metal to flow. The distance traveled by the molten metal in the spiral determines its fluidity and is measured visually by the operator with the help of the spiral scale printed on the Loop. A workstation is used to support the Loop for an easier and better working environment. At present, the entire operation of fluidity measurement is done manually. The aim of the thesis is to develop an automatic workstation for the fluidity measurement and find a technique to measure the fluidity without human visual aid. Further, an attempt has been made to find a way to store and retrieve the measured values for future use. The automation of the workstation is done with the help of Arduino Uno circuit board for electrical connections and Arduino IDE for programming the circuit. MATLAB image processing tool is used for measuring the fluidity digitally. The prototype of the automated workstation is built and showcases the ability to reduce the time and operational errors. The automation of the unplugging operation saves up to 7 seconds. The digital measuring of the fluidity with FLIR thermal camera and MATLAB image processing tool does not show significant improvement in accuracy in measurement, but it reduces the dependency on the expertise of the operator. There is an error of 12.7% from the actual fluidity value.
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Műller, Martin. "Zdravotně technické a plynovodní instalace v předškolním zařízení." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372073.
Abstract:
The thesis deals with the technical and gas installation with the use of precipitation water in pre-school facilities. The theoretical part deals with fat traps. The experimental part is focused on water flows, pre-school facilities. In the design and calculation part are drafted sewerage, water supply, gas pipeline, use of rain water and connection of the building to utility networks. The thesis was elaborated according to current standards, laws and decrees
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Bjurman, Peter, and Peter Li. "Automated scan station for 3D measurements of millimetre wave antennas." Thesis, Uppsala universitet, Mikrovågs- och terahertzteknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-133630.
Abstract:
As the importance of high frequency antennas increase in the world so does the needfor accurate measurements of the antenna performance.This project has endeavoured to create an automated scan station that can measurethe antenna performance from an EHF (extremely high frequency) antenna.These points are measured spherically around the antenna.A tested design from the Helsinki University that requires only two degrees offreedom to achieve spherical measurements was used. A network analyzer is used asthe measuring instrument along with the receiver antenna attached to the stationsarms. All components are controlled and monitored through a computer usingsoftware designed in LabVIEW.A backlash due to high tolerances on the two axle wedges was discovered duringassembly and a solution was devised using thread tape, however its effect has notbeen tested. The project was worked on during the summer holidays which resultedin delays on ordered parts, because of this the motor control from the LabVIEWprogram has not yet been implemented. This also means that the automated sequencethat performs the measurements has not been tested.With an implemented motor control and reduced backlash from the wedges the scanstation is expected to achieve high accuracy and reliability.
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Jang, Jinho S. M. Massachusetts Institute of Technology. "Trust and human performance in automated formation flight station-keeping." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/34139.
Abstract:
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2005.Includes bibliographical references (p. 81-84).
This thesis primarily describes performance and decision heuristics of human operators intervention with an autonomous formation flight (AFF) system during monitoring of a station-keeping display. Due to mental and physical workloads, automation technologies have been applied to formation flight for precise station-keeping and resultant fuel reduction, shifting control authority from humans to machines. Accordingly, the human is not directly in the control loop, but just supervises whether or not the automation works as intended. One critical problem in AFF supervisory control is that the human pilot needs to intervene with AFF system when the automated systems malfunction or their functions degrade. Thus while monitoring a station-keeping display, operators should minimize incorrect decisions for safety and cost reduction. To examine design issues in such a display, a simulation was constructed that simulated two different control systems as well as the impact of different angles of bank. 20 subjects participated in the monitoring task simulation of the station-keeping display. During the experiments, subjects were asked to intervene with AFF system when the AFF system failed to keep the trailing aircraft in the vortex area. Subjects made the most incorrect decisions when the AFF system was operated with the oscillating controller and high angle of bank.
(cont.) Trust of the human in the AFF system was found to be influenced by the damping ratio of the AFF controller. Most significantly, results showed that humans developed biased decision criteria to execute interventions because velocity feedback of the wing tip on this display was not adequately provided.
by Jinho Jang.
S.M.
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Berrian, Joshua. "AN AUTOMATED TEST STATION DESIGN USED TO VERIFY AIRCRAFT COMMUNICATION PROTOCOLS." DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/635.
Abstract:
Requirements verification is typically the costliest part of the systems engineering design process. In the commercial aircraft industry, as the software and hardware design evolves, it must be verified to conform to requirements. In addition, when new design releases are made, regression analysis must be performed which usually requires repeat testing. To streamline verification, a suite of automated verification tools is described in this document which can reduce the test effort. This test suite can be qualified to be used to verify systems at any DO-178B design assurance level. Some of the software tools are briefly described below.
There are major advantages of this automated verification effort. The tools can either be internally developed by a company or purchased "off the shelf", depending upon budget and staff constraints. Every automated test case can be run with the click of a button and failures caused by human factors are reduced. The station can be qualified per DO-178B guidelines, and can also be expanded to support ARINC 429, AFDX, Ethernet, and MIL-STD-1553 interfaces. The expansion of these test programs would enable the creation of a universal avionics test suite with minimal cost and a reduction of the overall program verification effort.
The following is a presentation of an automated test station capable of reducing verification time and cost. The hardware and software aspects needed to create the test station are examined. Also, steps are provided to help guide a designer through the tool qualification process. Lastly, a full suite of test functions are included that can be implemented and customized to verify a wide range of avionics communication characteristics.
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Šohajek, Jiří. "Analýza vyvrtávacího procesu automatické horizontální vyvrtávačky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228141.
Abstract:
The object of this dissertation is to analyse a drilling process of an automatic horizontal boring machine the SVD2 for drilling of bearing holes. There were problems with vibrations during drilling process, causing an extreme noise and this dissertation solves them. First of all it was necessary to analyse the vibrations, to examine a machining process and measure machine dynamics and statics. Another task was to compare measured results with mathematical models and after their analysis to design structural and other solutions. The SVD2 machine was designed on the basis of a previous type the SVD. Its conversion to a new one was based on adding of six spindles. As a result a number of drilled bodies was increased from one to four, so a performance was increased four times. That is why there was an original intention to rebuilt the other two spindle machines. To leave the basical parts of the machine without any modification ( such as a reinforcement of a mount and adjusting of a bigger distance of a side linear spindle guideway and a cross linear guideway of a support for clamping devices), would be unsuitable solution, which was confirmed after a measurement and a following analysis.
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Saraf, Sidharth. "Rendezvous simulation of the Automated Transfer Vehicle with the International Space Station." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0002/MQ32407.pdf.
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Andersson, Karl. "PLC Lab Station : An Implementation of External Monitoring and Control Using OPC." Thesis, Mittuniversitetet, Avdelningen för elektronikkonstruktion, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-22649.
Abstract:
The PLC is frequently used when implementing automated control, which is animportant part of many modern industries. This thesis has been carried out incollaboration with ÅF Consult in Sundsvall, who were in need of a PLC labstation for educational purposes. The overall aim of this thesis has been todesign and construct such a lab station and also to implement a solution forexternal monitoring and control possibilities. The methodology of this projecthas included a literary study, followed by the implementation of the actualsolutions and finally an evaluation of the project. The finished lab stationincludes a conveyor belt and a robotic arm controlled using two PLCs. Theconveyor belt is designed to be able to store, transport, differentiate and sortsmall cubes of various materials, and the robotic arm is designed as a pick-andplacedevice that can move the cubes between different positions on the labstation. The monitoring and control solution is set up using an OPC clientserverconnection on a PC and it provides a graphical user interface where thelab station can be monitored and controlled externally. The lab station offersdiverse functionality, but due to some inconsistency in the included equipmentit is not entirely reliable. The external monitoring and control solution alsoprovides good functionality, but the time frame of the project resulted in a lessextensive implementation than originally intended. The overall solutions are,however, considered to offer a functional and proper platform for educationalpurposes.
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Draghetti, Lorenzo. "Optimized design of an ABB robotic palletizing station." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.
Abstract:
Nowadays pallets (and then palletization) have become an essential tool for the various stages of the production and supply chain. The palletization process is typically automatized and can be realized in 2 ways: exploiting automatic machines (conventional palletizers) or robots (robotic palletizers). The latter option provides higher flexibility at the cost of lower operation speed.
The aim of this thesis is to design and program an ABB robotic palletizing station trying to minimize as possible process time and space and meeting some predefined requirements, using the software ABB RobotStudio. The particularity of this project is that 3 different kinds of boxes, which come to the station with different probabilities, need to be subjected to some operations (drawing and writing) before to get palletized onto different pallets.
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Rungta, Neha Shyam. "Guided Testing for Automatic Error Discovery in Concurrent Software." Diss., CLICK HERE for online access, 2009. http://contentdm.lib.byu.edu/ETD/image/etd3175.pdf.
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Kyselý, Tomáš. "Selftest pro automatický průmyslový tester." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-316423.
Abstract:
Work discusses about the test station in NXP Semiconductors Company in Rožnov pod Radhoštěm. It describes first the test station itself and its possibilities in software libraries testing. Second it describes automatic selftest of this station and sub-steps of this selftest. This work is also used as a documentation for company needs. KEYWORDS
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Germeys, Jasper. "Supervision of the Air Loop in the Columbus Module of the International Space Station." Thesis, Linköpings universitet, Fordonssystem, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-133926.
Abstract:
Failure detection and isolation (FDI) is essential for reliable operations of complex autonomous systems or other systems where continuous observation or maintenance thereof is either very costly or for any other reason not easily accessible. Beneficial for the model based FDI is that there is no need for fault data to detect and isolate a fault in contrary to design by data clustering. However, it is limited by the accuracy and complexity of the model used. As models grow more complex, or have multiple interconnections, problems with the traditional methods for FDI emerge. The main objective of this thesis is to utilise the automated methodology presented in [Svärd, 2012] to create a model based FDI system for the Columbus air loop. A small but crucial part of the life support on board the European space laboratory Columbus. The process of creating a model based FDI, from creation of the model equations, validation thereof to the design of residuals, test quantities and evaluation logic is handled in this work. Although the latter parts only briefly which leaves room for future work. This work indicate that the methodology presented is capable to create quite decent model based FDI systems even with poor sensor placement and limited information of the actual design. [] Carl Svärd. Methods for Automated Design of Fault Detection and Isolation Systems with Automotive Applications. PhD thesis, Linköping University, Vehicular Systems, The Institute of Technology, 2012
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de, Carvalho Gomes Pedro. "Automatic Extraction of Program Models for Formal Software Verification." Doctoral thesis, KTH, Teoretisk datalogi, TCS, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-176286.
Abstract:
In this thesis we present a study of the generation of abstract program models from programs in real-world programming languages that are employed in the formal verification of software. The thesis is divided into three parts, which cover distinct types of software systems, programming languages, verification scenarios, program models and properties.The first part presents an algorithm for the extraction of control flow graphs from sequential Java bytecode programs. The graphs are tailored for a compositional technique for the verification of temporal control flow safety properties. We prove that the extracted models soundly over-approximate the program behaviour w.r.t. sequences of method invocations and exceptions. Therefore, the properties that are established with the compositional technique over the control flow graphs also hold for the programs. We implement the algorithm as ConFlEx, and evaluate the tool on a number of test cases.The second part presents a technique to generate program models from incomplete software systems, i.e., programs where the implementation of at least one of the components is not available. We first define a framework to represent incomplete Java bytecode programs, and extend the algorithm presented in the first part to handle missing code. Then, we introduce refinement rules, i.e., conditions for instantiating the missing code, and prove that the rules preserve properties established over control flow graphs extracted from incomplete programs. We have extended ConFlEx to support the new definitions, and re-evaluate the tool, now over test cases of incomplete programs.The third part addresses the verification of multithreaded programs. We present a technique to prove the following property of synchronization with condition variables: "If every thread synchronizing under the same condition variables eventually enters its synchronization block, then every thread will eventually exit the synchronization". To support the verification, we first propose SyncTask, a simple intermediate language for specifying synchronized parallel computations. Then, we propose an annotation language for Java programs to assist the automatic extraction of SyncTask programs, and show that, for correctly annotated programs, the above-mentioned property holds if and only if the corresponding SyncTask program terminates. We reduce the termination problem into a reachability problem on Coloured Petri Nets. We define an algorithm to extract nets from SyncTask programs, and show that a program terminates if and only if its corresponding net always reaches a particular set of dead configurations. The extraction of SyncTask programs and their translation into Petri nets is implemented as the STaVe tool. We evaluate the technique by feeding annotated Java programs to STaVe, then verifying the extracted nets with a standard Coloured Petri Net analysis toolDen här avhandlingen studerar automatisk konstruktion av abstrakta modeller för formell verifikation av program skrivna i verkliga programmeringsspråk. Avhandlingen består av tre delar som involverar olika typer av program, programmeringsspråk, verifikationsscenarier, programmodeller och egenskaper.Del ett presenterar en algoritm för generation av flödesgrafer från sekventiella program i Java bytekod. Graferna är skräddarsydda för en kompositionell teknik för verifikationen av temporala kontrollflödens säkerhetsegenskaper. Vi visar att de extraherade modellerna sunt överapproximerar programbeteenden med avseende på sekvenser av metodanrop och -undantag. Således gäller egenskaperna som kan fastställas genom kompositionstekniken över kontrollflöden även för programmen. Vi implementerar dessutom algoritmen i form av verktyget ConFlEx och utvärderar verktyget på ett antal testfall.Del två presenterar en teknik för att generera modeller av ofullständiga program. Det vill säga, program där implementationen av åtminstone en komponent inte är tillgänglig. Vi definierar ett ramverk för att representera ofullständiga Java bytekodsprogram och utökar algoritmen från del ett till att hantera ofullständig kod. Därefter presenterar vi raffineringsregler - villkor för att instansiera den saknade koden - och bevisar att reglerna bevarar relevanta egenskaper av kontrollflödesgrafer. Vi har dessutom utökat ConFlEx till att stödja de nya definitionerna och har omvärderat verktyget på testfall av ofullständiga program.Del tre angriper verifikation av multitrådade program. Vi presenterar en teknik för att bevisa följande egenskap för synkronisering med vilkorsvariabler: "Om varje trådsynkronisering under samma villkor så småningom stiger in i sitt synkroniseringsblock så kommer varje tråd också till slut lämna synkroniseringen". För att stödja verifikationen så introducerar vi först SyncTask - ett enkelt mellanliggande språk för att specificera synkronisering av parallella beräkningar. Därefter presenterar vi ett annoteringsspråk för Java som tillåter automatisk extrahering av SyncTask-program och visar att egenskapen gäller om och endast om motsvarande SyncTask-program terminerar. Vi reducerar termineringsproblemet till ett nåbarhetsproblem på färgade Petrinät samt definierar en algoritm som skapar Petrinät från SyncTask-program där programmet terminerar om och endast om nätet alltid når en särskild mängd av döda konfigurationer. Extraktionen av SyncTask-program och deras motsvarande Petrinät är implementerade i form av verktyget STaVe. Slutligen utvärderar vi verktyget genom att mata annoterade.
QC 20151101