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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Controle din?mico de rob?s m?veis com acionamento diferencial

Vieira, Frederico Carvalho 03 February 2006 (has links)
Made available in DSpace on 2014-12-17T14:56:02Z (GMT). No. of bitstreams: 1 FredericoCV.pdf: 1331103 bytes, checksum: ada41c7da2fcc7a89d6ae45f8758a676 (MD5) Previous issue date: 2006-02-03 / This work addresses the dynamic control problem of two-wheeled differentially driven non-holonomic mobile robot. Strategies for robot positioning control and robot orientating control are presented. Such strategies just require information about the robot con?guration (x, y and teta), which can be collected by an absolute positioning system. The strategies development is related to a change on the controlled variables for such systems, from x, y and teta to s (denoting the robot linear displacement) and teta, and makes use of the polar coordinates representation for the robot kinematic model. Thus, it is possible to obtain a linear representation for the mobile robot dynamic model and to develop such strategies. It is also presented that such strategies allow the use of linear controllers to solve the control problem. It is shown that there is flexibility to choice the linear controller (P, PI, PID, Model Matching techniques, others) to be implemented. This work presents an introduction to mobile robotics and their characteristics followed by the control strategies development and controllers design. Finally, simulated and experimental results are presented and commented / Esta disserta??o trata do problema de controle din?mico de rob?s m?veis n?o-holon?micos com duas rodas e acionamento diferencial. S?o apresentadas estrat?gias para controle de posi??o e de orienta??o de rob?s com as caracter?sticas citadas, baseadas apenas em informa??es de configura??o do rob? (posi??o e orienta??o no espa?o cartesiano x, y e teta), coletadas a partir de um sistema de posicionamento absoluto. O desenvolvimento da estrat?gia est? associado a uma mudan?a nas vari?veis controladas do rob?, de x, y e teta para s (representando o deslocamento linear do rob?) e teta, e na representa??o em coordenadas polares do modelo cinem?tico do rob?. Desta forma, consegue-se uma representa??o linear para o modelo din?mico do rob?, a partir da qual s?o propostas as estrat?gias de controle. Com as estrat?gias definidas, mostra-se que ? poss?vel implementar controladores din?micos lineares para permitir a estabiliza??o do sistema rob?tico. As estrat?gias apresentadas tamb?m fornecem flexibilidade com rela??o ? escolha do tipo de controlador din?mico (P, PI, PID, t?cnica Model Matching, entre outros) a ser utilizado. Esta disserta??o apresenta uma introdu??o ? rob?tica m?vel e ?s caracter?sticas do tipo de sistema abordado, seguindo para uma revis?o bibliogr?fica, desenvolvimento das estrat?gias de controle e projeto dos controladores. Finalmente, s?o apresentados e discutidos resultados obtidos atrav?s de simula??es e resultados experimentais

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