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Master's Dissertation
DOI
https://doi.org/10.11606/D.3.2020.tde-05032021-105847
Document
Author
Full name
Isabella Stevani
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2020
Supervisor
Committee
Colón, Diego (President)
Bueno, Átila Madureira
Campo, Alexandre Brincalepe
Title in English
Robust Control of a 2-DOF parallel mechanism combining feedback linearization and H-infinity design.
Keywords in English
Feedback linearization
H-infinity control
Parallel mechanism
Robotic
Robust control
Abstract in English
This work presents the robust control of a nonlinear plant with uncertain parameters, in this case a 2-DOF parallel mechanism. First, the robot dynamic and kinematic models were computed using a new methodology based on the serial subsystems models that compose the parallel topology, which are later pieced together through mechanical constraints to form the complete parallel robot model. Then, a robust control architecture combining H? design and feedback linearization was designed in order to guarantee robust performance and stability even in the presence of uncertain parameters in the model. To validate both mechanism's modeling and control, simulation results were provided.
Title in Portuguese
Controle robusto de um mecanismo paralelo de 2-GDL combinando linearização por realimentação e projeto H-infinito.
Keywords in Portuguese
Controle infinito
Controle robusto
Mecanismo paralelo
Robótica
Abstract in Portuguese
Este trabalho apresenta o controle robusto de uma planta não linear considerando incertezas de parâmetros, no caso um mecanismo paralelo de 2-GDL. Primeiramente,as modelagens dinâmica e cinemática do robô foram deduzidas a partir de uma nova metodologia, esta baseada nos modelos dos subsistemas seriais que compõe a topologia paralela que são combinados posteriormente a partir de equações de restrições mecânicas, assim gerando o modelo completo do robô paralelo. Em seguida, uma arquitetura de controle robusta combinando controle H? e linearização por realimentação foi projetada a fim de se garantir robustez de estabilidade e desempenho do sistema, inclusive na presença de incertezas de parâmetros do modelo. Com o objetivo de validar tanto a modelagem do mecanismo quanto seu controle, resultados simulados foram obtidos.
 
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Publishing Date
2021-03-18
 
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