Linear Matrix Inequalities
Mostrando 13-24 de 65 artigos, teses e dissertações.
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13. Local stabilization of discrete-time linear systems with saturating controls : an LMI-Based approach
This note deals with the problem of local stabilization of linear discrete-time systems subject to control saturation.Alinear matrix inequalitie- based framework is proposed in order to compute a saturating state feedback that stabilizes the system with respect to a given set of admissible initial states and, in addition, guarantees some dynamical performanc
Publicado em: 2011
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14. Local stabilization of linear systems under amplitude and rate saturating actuators
This note addresses the problem of local stabilization of linear systems subject to control amplitude and rate saturation. Considering the actuator represented by a first-order system subject to input and state saturation, a condition for the stabilization of an a priori given set of admissible initial states is formulated from certain saturation nonlinearit
Publicado em: 2011
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15. Synthesis of Controllers for Continuous-Time Delay Systems with Saturating Controls via LMI's
The stabilization of linear continuous-time systems with time delay in the state and subject to saturating controls is addressed. Sufficient conditions obtained via a linear matrix inequality (LMI) formulation are stated to guarantee both the local stabilization and the satisfaction of some performance requirements. The method of synthesis consists in determ
Publicado em: 2011
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16. Dynamic output feedback for discrete-time systems under amplitude and rate actuator constraints
This work proposes a technique for the design of stabilizing dynamic output feedback controllers for discrete-time linear systems with rate and amplitude saturating actuators. The nonlinear effects introduced by the saturations in the closed-loop system are taken into account by using a generalized sector condition, which leads to theoretical conditions for
Publicado em: 2011
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17. Controle H-infinito em suspensões ativas aplicando técnicas baseadas em desigualdades matriciais lineares / H-infinity control at active suspension applying techniques based onlinear matrix inequalities
Nesse estudo foram aplicadas as técnicas de controle H1 em modelos de suspensões ativas veiculares. O interesse de controlar o sistema baseado nessa técnica está também no fato de que sua obtenção pode ser feita através da solução de problemas de otimização, sendo estes baseados no uso de Desigualdades Matriciais Lineares (LMI, do inglês Linear
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/08/2010
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18. Design of controllers to damp oscillations in electrical systems with distributed generation / Projeto de controladores para o amortecimento de oscilações em sistemas elétricos com geração distribuída
Essa pesquisa se propõe a investigar o uso de Inclusões Diferenciais Lineares Limitadas por Norma (IDLNs) para projeto de controladores de amortecimento de tipo PSS (Power System Stabilizer) para sistemas elétricos com a presença de geração distribuída. Uma vez definida de maneira adequada, uma IDLN pode ser capaz de englobar um conjunto de trajetóri
Publicado em: 2010
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19. Filtragem robusta de sistemas lineares invariantes no tempo por meio de funções de Lyapunov polinomiais / Robust filtering of linear time invariant systems by means of polynomial Lyapunov functions
This work presents new convex optimization procedures for full order robust H2 and H? filter design for continuous and discrete-time uncertain linear systems. The time-invariant uncertain parameters are supposed to belong to a polytope with known vertices. Thanks to the use of a larger number of slack variables and homogeneous polynomial relaxations, linear
Publicado em: 2010
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20. Projeto de controladores ressonantes para sistemas ininterruptos de energia para seguimento assintótico de sinais de referência senoidais e rejeição de harmônicos
Esta dissertação apresenta uma estratégia de controle robusto para seguimento de referência senoidal com erro nulo e rejeição de componentes harmônicos em regime permanente, para uma fonte ininterrupta de energia (UPS Uninterruptable Power Supply) monofásica de 5kVA. Com este objetivo, empregam-se múltiplos compensadores ressonantes os quais são si
Publicado em: 2010
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21. Robust control methodology for the design of supplementary damping controllers for FACTS devices
Este artigo propõe um novo procedimento para projeto de controladores suplementares de amortecimento (ou SDCs, do inglês Supplementary Damping Controllers) para dispositivos FACTS. O problema de projeto do controlador é formulado como uma busca por um controlador que satisfaça um conjunto de restrições na forma de desigualdades matriciais lineares (ou
Sba: Controle & Automação Sociedade Brasileira de Automatica. Publicado em: 2009-06
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22. Control and filtering of time-varying linear systems via parameter dependent Lyapunov functions / Controle e filtragem de sistemas lineares variantes no tempo por meio de funções de Lyapunov dependentes de parametros
The main contribution of this dissertation is to propose conditions for linear filter and controller design, considering both robust and parameter dependent structures, for discrete time-varying systems. The controllers, or filters, are obtained through the solution of optimization problems, formulated in terms of bilinear matrix inequalities, using a method
Publicado em: 2009
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23. Control of dynamic systems : absolute stability, saturation and bilinearity / Controle de sistemas dinamicos : estabilidade absoluta, saturação e bilinearidade
This thesis presents contributions to the solution of the problems of stability analysis and synthesis of state feedback controllers for dynamic systems with non-linear elements, by means of conditions based on linear matrix inequalities and Lyapunov functions. For switched systems subject to saturation in the actuators, convex conditions to design switched
Publicado em: 2009
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24. Controle em horizonte finito com restriçoes de sistemas lineares discretos com saltos markovianos / Constrained control problem within a finite horizon of markovian jump discrete linear systems
The purpose of this work is to propose and solve the constrained control problem within a finite horizon of Markovian Jump Discrete Linear Systems (MJDLS) driven by noise. The constraints of the state and control vectors are not rigid and limits are established respectively to their first and second moments. The controller is based on a linear state feedback
Publicado em: 2009