The research developed force-motion strategies and subsequent force and position control algorithms, using a PUMA 560 robot arm and its original controller. A task decomposition methodology has been developed that enables a mechanical assembly task to be subdivided into a series of executable subtasks. By applying this methodology to the assembly of a hydraulic gear pump, a library of special purpose, task oriented, subtask programs were created. Most of these programs, though derived for a pump assembly task, are applicable (when used with appropriate parameters) to other assembly tasks. Most of the algorithms require force/torque sensory information that is supplied by a JR³ wrist force sensor. The force control algorithms use that data and system compliance in order to produce new position instructions that are transferred to the controller of the arm. The logic of the control law and system behaviour when contacting the environment, were checked, using the dynamics and compliance of a simplified structure of a robotic arm and its wrist sensor. A demonstration of the pump assembly task, using the arm, force sensor, controller and the derived library algorithms is an integral part of the thesis. / Applied Science, Faculty of / Mechanical Engineering, Department of / Graduate

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published_or_final_version / abstract / Electrical and Electronic Engineering / Doctoral / Doctor of Philosophy

published_or_final_version / Electrical and Electronic Engineering / Master / Master of Philosophy

Esta tesis presenta una propuesta para el desarrollo de un móvil con un sistema electrónico modular que permita el acoplamiento de otros sub-sistemas y la ejecución de diferentes funciones y que además será controlado remotamente por un usuario, quien obtendrá información del medio a través del robot. El diseño de este móvil es requerido por el grupo de investigación de Ingeniería Civil, quiénes necesitan de un intermediario, en este caso, el robot, para acceder a los túneles subterráneos de la Huaca de la Luna y recolectar bloques de adobe. En este documento, se detalla el problema existente en la recolección de los bloques de adobe de la Huaca de la Luna debido a las zonas inseguras de difícil acceso y el inconveniente por el constante rediseño de los robots de exploración debido a su inadaptabilidad al terreno al que se enfrentan. Además, se analizan los principales robots de exploración, cuyas funciones varían entre la toma de fotografías y video para zonas como túneles angostos, de estructuras inestables o de ambientes tóxicos no aptos para el ser humano. Sin embargo, todos tienen como común denominador el brindar seguridad a las personas y servir como intermediarios entre el medio y el usuario. Para el diseño del móvil, se han tenido en cuenta los requerimientos físico-mecánicos limitados por las dimensiones del túnel y las características de los bloques de adobe; y los requerimientos electrónicos y de control que permita una comunicación estándar entre el móvil y el usuario que lo controla. Por su parte, el sistema electrónico modular le otorga la posibilidad de realizar diferentes funciones de acuerdo a los mecanismos que se acoplen. Además, se definieron las principales funciones del robot: movilidad en el terreno, control remoto del móvil, observación del medio mediante una cámara de video, recopilación de información a través de los sensores, recolección de muestras mediante los mecanismos a implementar y comunicación entre el móvil y el usuario. Asimismo, este trabajo detalla la estructuración e integración de los subsistemas involucrados (mecánico, electrónico, control, comunicación) y de los componentes seleccionados. Todos necesarios para lograr el diseño de un robot móvil de 60kg que puede movilizarse a una distancia máxima de 300 metros a una velocidad entre 13cm/s y 15cm/s capaz de cargar los bloques de adobe de 16kg y acoplar un mecanismo auxiliar de 10kg. / Tesis

Chow Ying-ho. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2000. / Includes bibliographical references (leaves 78-83). / Abstracts in English and Chinese. / Chapter Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Objectives - Visual Navigation for Legged Robots --- p.1 / Chapter 1.2 --- Summary of Results --- p.3 / Chapter 1.3 --- Hardware Issues --- p.4 / Chapter 1.4 --- Contributions --- p.4 / Chapter 1.5 --- Organization of the Thesis --- p.4 / Chapter Chapter 2 --- Previous Work --- p.6 / Chapter 2.1 --- Vision Based Navigation --- p.6 / Chapter 2.1.1 --- Homography --- p.7 / Chapter 2.1.2 --- Ground Plane Obstacle Detection --- p.9 / Chapter 2.1.3 --- Regression --- p.12 / Chapter 2.2 --- Control Strategy --- p.13 / Chapter Chapter 3 --- System Overview --- p.16 / Chapter Chapter 4 --- Obstacle Detection by Fast Homography Estimation --- p.20 / Chapter 4.1 --- Ground Feature Extraction --- p.21 / Chapter 4.2 --- Ground Feature Correspondence --- p.21 / Chapter 4.3 --- Ground Homography Estimation --- p.24 / Chapter 4.3.1 --- Input point transformation --- p.24 / Chapter 4.3.2 --- Initial estimation --- p.26 / Chapter 4.3.3 --- Robust estimation --- p.27 / Chapter 4.4 --- Obstacle Detection --- p.29 / Chapter 4.5 --- Local Obstacle Map (LOM) on Ground --- p.33 / Chapter 4.5.1 --- Extraction from accumulative evidence --- p.34 / Chapter 4.5.2 --- Time-delay compensation --- p.34 / Chapter Chapter 5 --- Obstacle Avoidance by a Fuzzy Controller --- p.36 / Chapter 5.1 --- Gait Pattern --- p.38 / Chapter 5.2 --- Fuzzy Logic Controller --- p.42 / Chapter 5.2.1 --- Controller Inputs --- p.42 / Chapter 5.2.2 --- Controller Outputs --- p.43 / Chapter 5.2.3 --- Inference mechanism --- p.46 / Chapter Chapter 6 --- Implementation --- p.49 / Chapter 6.1 --- Hardware components --- p.49 / Chapter 6.1.1 --- VisionBug --- p.49 / Chapter 6.1.2 --- RF transmitter / receiver modules: --- p.52 / Chapter 6.2 --- Perception --- p.55 / Chapter 6.3 --- Image Calibration --- p.56 / Chapter 6.4 --- Motion Calibration: --- p.58 / Chapter 6.5 --- Software Programs --- p.66 / Chapter 6.5.1 --- Computational complexity --- p.68 / Chapter Chapter 7 --- Experimental Results --- p.69 / Chapter 7.1 --- Real Navigation Experiments --- p.70 / Chapter 7.2 --- Error Analysis of LOM --- p.73 / Chapter Chapter 8 --- Conclusion and future work --- p.76

Wang Hesheng. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2004. / Includes bibliographical references (leaves 70-73). / Abstracts in English and Chinese. / Abstract --- p.i / Acknowledgement --- p.iv / Contents --- p.v / List of Figures --- p.vii / List of Tables --- p.viii / Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Visual Servoing --- p.1 / Chapter 1.1.1 --- Position-based Visual Servoing --- p.4 / Chapter 1.1.2 --- Image-based Visual Servoing --- p.5 / Chapter 1.1.3 --- Camera Configurations --- p.7 / Chapter 1.2 --- Problem Definitions --- p.10 / Chapter 1.3 --- Related Work --- p.11 / Chapter 1.4 --- Contribution of This Work --- p.15 / Chapter 1.5 --- Organization of This Thesis --- p.16 / Chapter 2 --- System Modeling --- p.18 / Chapter 2.1 --- The Coordinates Frames --- p.18 / Chapter 2.2 --- The System Kinematics --- p.20 / Chapter 2.3 --- The System Dynamics --- p.21 / Chapter 2.4 --- The Camera Model --- p.23 / Chapter 2.4.1 --- Eye-in-hand System --- p.28 / Chapter 2.4.2 --- Eye-and-hand System --- p.32 / Chapter 3 --- Adaptive Image-based Visual Servoing --- p.35 / Chapter 3.1 --- Controller Design --- p.35 / Chapter 3.2 --- Estimation of The Parameters --- p.38 / Chapter 3.3 --- Stability Analysis --- p.42 / Chapter 4 --- Simulation --- p.48 / Chapter 4.1 --- Simulation I --- p.49 / Chapter 4.2 --- Simulation II --- p.51 / Chapter 5 --- Experiments --- p.55 / Chapter 6 --- Conclusions --- p.63 / Chapter 6.1 --- Conclusions --- p.63 / Chapter 6.2 --- Feature Work --- p.64 / Appendix --- p.66 / Bibliography --- p.70

Lam Kin Kwan. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2005. / Includes bibliographical references (leaves 67-70). / Abstracts in English and Chinese. / Chapter 1. --- Introduction --- p.1 / Chapter 1.1 --- Visual Servoing --- p.1 / Chapter 1.1.1 --- System Architectures --- p.2 / Chapter 1.1.1.1 --- Position-based Visual Servoing --- p.2 / Chapter 1.1.1.2 --- Image-based Visual Servoing --- p.3 / Chapter 1.1.2 --- Camera Configurations --- p.4 / Chapter 1.2 --- Problem Definition --- p.5 / Chapter 1.3 --- Related Work --- p.6 / Chapter 1.4 --- Contribution of This Work --- p.9 / Chapter 1.5 --- Organization of This Thesis --- p.10 / Chapter 2. --- System Modeling --- p.11 / Chapter 2.1 --- Coordinate Frames --- p.11 / Chapter 2.2 --- System Kinematics --- p.13 / Chapter 2.3 --- System Dynamics --- p.14 / Chapter 2.4 --- Camera Model --- p.15 / Chapter 2.4.1 --- Eye-in-hand Configuration --- p.18 / Chapter 2.4.2 --- Eye-and-hand Configuration --- p.21 / Chapter 3. --- Adaptive Visual Servoing Control --- p.24 / Chapter 3.1 --- Controller Design --- p.24 / Chapter 3.2 --- Parameter Estimation --- p.27 / Chapter 3.3 --- Stability Analysis --- p.30 / Chapter 4. --- Experimental Studies --- p.34 / Chapter 4.1 --- Experimental Setup --- p.34 / Chapter 4.1.1 --- Hardware Setup --- p.34 / Chapter 4.1.2 --- Image Pattern Recognition --- p.35 / Chapter 4.1.3 --- Experimental Task --- p.36 / Chapter 4.2 --- Control Performance with Different Proportional Gains and Derivative Gains --- p.39 / Chapter 4.3 --- Control Performance with Different Adaptive Gains --- p.41 / Chapter 4.4 --- Gravity Compensator --- p.50 / Chapter 4.5 --- Control Performance with Previous Image Positions --- p.51 / Chapter 4.6 --- Kinematic Controller --- p.56 / Chapter 5. --- Conclusions --- p.61 / Chapter 5.1 --- Conclusions --- p.61 / Chapter 5.2 --- Future Work --- p.62 / Appendix --- p.63 / Bibliography --- p.67

Shen Yantao. / "April 2002." / Thesis (Ph.D.)--Chinese University of Hong Kong, 2002. / Includes bibliographical references (p. 117-122). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Electronic reproduction. Ann Arbor, MI : ProQuest Information and Learning Company, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Mode of access: World Wide Web. / Abstracts in English and Chinese.