Academic literature on the topic 'Mobile Robot'

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Dissertations / Theses on the topic "Mobile Robot"

1

Yang, Hai. "Etude d’un système de fabrication agile mobile pour composants de grande taille." Thesis, Montpellier 2, 2012. http://www.theses.fr/2012MON20042/document.

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Les robots industriels, bien connus pour être des systèmes de fabrication flexibles et agiles, atteignent leurs limites lorsqu'il s'agit d'effectuer des tâches sur des pièces de grande taille (par exemple: les pièces longues et minces de l'industrie aéronautique). Pour ce type des tâches, les solutions existantes sont à leurs limites: les bras manipulateurs à base fixe souffrent d'un espace de travail trop limité; les bras manipulateurs montés sur véhicule ne sont pas assez précis; les machines-outils conventionnelles doivent être conçus à méga-échelle (plusieurs dizaines de mètres). Dans la cadre de cette thèse de doctorat, nous avons proposé des solutions robotiques innovantes qui combinent la capacité de marcher (ou de grimper) sur la pièce (ou sur le montage d'usinage) avec la capacité d'usiner. De l'analyse de la topologie et de la mobilité à la modélisation géométrique et cinématique, ainsi que la proposition d'algorithmes de contrôle innovants, des robots ont été proposés et étudiés pour la réalisation des tâches d'usinage ainsi que des tâches de locomotion. Un prototype a été construit qui témoigne de la pertinence de ce concept innovant. Il repose sur une architecture parallèle à actionnement redondant (8 moteurs pour 6 degrés de liberté) et combine moteurs, freins, dispositifs de bridage et de nombreux capteurs de position. Le prototype peut se fixer sur le montage d'usinage, réaliser ses tâches de fabrication, puis modifier sa configuration pour devenir un robot marcheur capable d'atteindre la zone de travail suivante<br>Industrial robots, well known as flexible and agile manufacturing systems, reach their limits when dealing with very large workpieces (e.g.: very long and slender parts found in aeronautics industry). For such tasks, existing solutions are at their limits: stationary manipulator arms suffer from a too limited workspace; manipulators mounted on a vehicle are not accurate enough; classical machine-tools must be designed at mega-scale (several tens of meters). This thesis work aims at offering an innovative robotic solution that combines the ability to walk (or climb) on the workpiece (or on the tooling that supports the workpieces) together with manufacturing ability. From the topology and mobility analysis to the geometrics and kinematics modeling, as well as innovative control algorithms proposition, the proposed mobile manufacturing robots have been studied for achieving both machining and locomotion tasks. A prototype has been built to show the concept effectiveness . It is based on a parallel mechanism with actuation redundancy (8 motors for 6 degrees-of-freedom), combining motors, brakes, clamping devices and numerous position sensors. The robot can clamp itself on the manufacturing tooling, and then change its configuration to become a walking robot able to reach the next working area
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2

Luh, Cheng-Jye 1960. "Hierarchical modelling of mobile, seeing robots." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/276998.

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This thesis describes the implementation of a hierarchical robot simulation environment which supports the design of robots with vision and mobility. A seeing robot model applies a classification expert system for visual identification of laboratory objects. The visual data acquisition algorithm used by the robot vision system has been developed to exploit multiple viewing distances and perspectives. Several different simulations have been run testing the visual logic in a laboratory environment. Much work remains to integrate the vision system with the rest of the robot system.
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3

Baba, Akihiko. "Robot navigation using ultrasonic feedback." Morgantown, W. Va. : [West Virginia University Libraries], 1999. http://etd.wvu.edu/templates/showETD.cfm?recnum=677.

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Thesis (M.S.)--West Virginia University, 1999.<br>Title from document title page. Document formatted into pages; contains viii, 122 p. : ill. Includes abstract. Includes bibliographical references (p. 57-59).
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4

Cheng, Sheri A. (Sheri Ann) 1977. "Mobile robot relocation." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/91353.

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5

Sorour, Mohamed. "Motion discontinuity-robust controller for steerable wheeled mobile robots." Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTS090/document.

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Les robots mobiles à roues orientables gagnent de la mobilité en employant des roues conventionnelles entièrement orientables, comportant deux joints actifs, un pour la direction et un autre pour la conduite. En dépit d'avoir seulement un degré de mobilité (DOM) (défini ici comme degrés de liberté instantanément autorisés DOF), correspondant à la rotation autour du centre de rotation instantané (ICR), ces robots peuvent effectuer des trajectoires planaires complexes de $ 2D $. Ils sont moins chers et ont une capacité de charge plus élevée que les roues non conventionnelles (par exemple, Sweedish ou Omni-directional) et, en tant que telles, préférées aux applications industrielles. Cependant, ce type de structure de robot mobile présente des problèmes de contrôle textit {basic} difficiles de la coordination de la direction pour éviter les combats d'actionneur, en évitant les singularités cinématiques (ICR à l'axe de la direction) et les singularités de représentation (du modèle mathématique). En plus de résoudre les problèmes de contrôle textit {basic}, cette thèse attire également l'attention et présente des solutions aux problèmes de textit {niveau d'application}. Plus précisément, nous traitons deux problèmes: la première est la nécessité de reconfigurer "de manière discontinue" les articulations de direction, une fois que la discontinuité dans la trajectoire du robot se produit. Une telle situation - la discontinuité dans le mouvement du robot - est plus susceptible de se produire de nos jours, dans le domaine émergent de la collaboration homme-robot. Les robots mobiles qui fonctionnent à proximité des travailleurs humains en mouvement rapide rencontrent généralement une discontinuité dans la trajectoire calculée en ligne. Le second apparaît dans les applications nécessitant que l'angle de l'angle soit maintenu, certains objets ou fonctionnalités restent dans le champ de vision (p. Ex., Pour les tâches basées sur la vision) ou les changements de traduction. Ensuite, le point ICR est nécessaire pour déplacer de longues distances d'un extrême de l'espace de travail à l'autre, généralement en passant par le centre géométrique du robot, où la vitesse du robot est limitée. Dans ces scénarios d'application, les contrôleurs basés sur l'ICR à l'état de l'art conduiront à des comportements / résultats insatisfaisants. Dans cette thèse, nous résolvons les problèmes de niveau d'application susmentionnés; à savoir la discontinuité dans les commandes de vitesse du robot et une planification meilleure / efficace pour le contrôle du mouvement du point ICR tout en respectant les limites maximales de performance des articulations de direction et en évitant les singularités cinématiques et représentatives. Nos résultats ont été validés expérimentalement sur une base mobile industrielle<br>Steerable wheeled mobile robots gain mobility by employing fully steerable conventional wheels, having two active joints, one for steering, and another for driving. Despite having only one degree of mobility (DOM) (defined here as the instantaneously accessible degrees of freedom DOF), corresponding to the rotation about the instantaneous center of rotation (ICR), such robots can perform complex $2D$ planar trajectories. They are cheaper and have higher load carrying capacity than non-conventional wheels (e.g., Sweedish or Omni-directional), and as such preferred for industrial applications. However, this type of mobile robot structure presents challenging textit{basic} control issues of steering coordination to avoid actuator fighting, avoiding kinematic (ICR at the steering joint axis) and representation (from the mathematical model) singularities. In addition to solving the textit{basic} control problems, this thesis also focuses attention and presents solutions to textit{application level} problems. Specifically we deal with two problems: the first is the necessity to "discontinuously" reconfigure the steer joints, once discontinuity in the robot trajectory occurs. Such situation - discontinuity in robot motion - is more likely to happen nowadays, in the emerging field of human-robot collaboration. Mobile robots working in the vicinity of fast moving human workers, will usually encounter discontinuity in the online computed trajectory. The second appears in applications requiring that some heading angle is to be maintained, some object or feature stays in the field of view (e.g., for vision-based tasks), or the translation verse changes. Then, the ICR point is required to move long distances from one extreme of the workspace to the other, usually passing by the robot geometric center, where the feasible robot velocity is limited. In these application scenarios, the state-of-art ICR based controllers will lead to unsatisfactory behavior/results. In this thesis, we solve the aforementioned application level problems; namely discontinuity in robot velocity commands, and better/efficient planning for ICR point motion control while respecting the maximum steer joint performance limits, and avoiding kinematic and representational singularities. Our findings has been validated experimentally on an industrial mobile base
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6

Li, Wan-chiu. "Localization of a mobile robot by monocular vision /." Hong Kong : University of Hong Kong, 2001. http://sunzi.lib.hku.hk/hkuto/record.jsp?B23765896.

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7

Gonullu, Muhammet Kasim. "Development Of A Mobile Robot Platform To Be Used In Mobile Robot Research." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615654/index.pdf.

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Robotics is an interdisciplinary subject and combines mechanical, computer and electrical engineering components together to solve different kinds of problems. In order to build robotic systems, these disciplines should be integrated. Therefore, mobile robots can be used as a tool in education for teaching engineering concepts. They can be employed to be used in undergraduate, graduate and doctorate research. Hands on experience on a mobile robot increase motivation of the students on the topic and give them precious practical knowledge. It also delivers students new skills like teamwork, problem solving, creativity, by executing robotic exercises. To be able to fulfill these outcomes, universities and research centers need mobile robot platforms that are modular, easy to build, cheap and flexible. However it should be also powerful and capable of being used in different research studies and hence be customizable depending on the requirements of these topics. This thesis aims at building an indoor mobile robot that can be used as a platform for developing algorithms involving various sensors incorporated onto a mobile platform. More precisely, it can be used as a base for indoor navigation and localization algorithms, as well as it can be used as platform for developing algorithms for larger autonomous mobile robots. The thesis work involves the design and manufacturing of a mobile robot platform that can potentially facilitate mobile robotics research that involves use of various hardware to develop and test different perception and navigation algorithms.
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8

Tennety, Srinivas. "Mobile robot navigation in hilly terrains." University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1313757135.

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9

李宏釗 and Wan-chiu Li. "Localization of a mobile robot by monocular vision." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31226371.

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10

Olafsson, Asgrimur. "Autonomous Mobile Robot Cooperation." Thesis, University of Skövde, Department of Computer Science, 1997. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-242.

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<p>This project is concerned with an investigation of simple communication between ANN-controlled mobile robots. Two robots are trained on a (seemingly) simple navigation task: to stay close to each other while avoiding collisions with each other and other obstacles.</p><p>A simple communication scheme is used: each of the robots receives some of the other robots’ outputs as inputs for an algorithm which produces extra inputs for the ANNs controlling the robots.</p><p>In the experiments documented here the desired cooperation was achieved. The different problems are analysed with experiments, and it is concluded that it is not easy to gain cooperation between autonomous mobile robots by using only output from one robot as input for the other in ANNs.</p>
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