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Master's Dissertation
DOI
https://doi.org/10.11606/D.55.2012.tde-28032012-151127
Document
Author
Full name
Daiane Cristina Bortolin
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2012
Supervisor
Committee
Costa, Eduardo Fontoura (President)
Andretta, Marina
Ramos, Rodrigo Andrade
Title in Portuguese
Métodos numéricos para o controle linear quadrático com saltos e observação parcial de estado
Keywords in Portuguese
Sistemas com saltos Markovianos
Sistemas estocásticos
Sistemas lineares
Teoria de controle
Abstract in Portuguese
Este trabalho consiste no estudo de métodos de otimização aplicados em um problema de controle para sistemas lineares com saltos markovianos (SLSM). SLSM formam uma importante classe de sistemas que têm sido muito úteis em aplicações envolvendo sistemas sujeitos a falhas e outras alterações abruptas de comportamento. Este estudo enfoca diferentes métodos para resolução deste problema. Comparamos o método variacional com o de Newton, sob o ponto de vista do número de problemas resolvidos e pelo nível de sub-otimalidade obtido (relação entre os custos obtidos por estes métodos). Também propomos um novo método, o qual pode ser inicializado com soluções de equações de Riccati acopladas, e o comparamos com o método variacional. Além disso, para a comparação dos métodos, propomos um algoritmo que gerou dez mil exemplos
Title in English
Numerical methods for linear quadratic control with partial observation jump and state
Keywords in English
Control theory
Linear systems
Stochastic systems and Markov jump systems
Abstract in English
This work addresses optimizations methods applied to a control problem for linear systems with markovian jumps, which form an important class of systems that have been very useful in applications involving systems subject to failures and other abrupt changes. This study focuses on different methods for solving this problem. We compare the variational approach with the Newton method, in terms of the number of solved problems and the level of sub-optimality (ratio between the costs obtained by these approaches). We also propose a new method, which can be initialized with solutions of coupled Riccati equations, and we compare it with the variational approach. We have proposed an algorithm for creating ten thousand examples for the comparisons
 
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Publishing Date
2012-03-28
 
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