Controle Automatico Estabilidade
Mostrando 1-12 de 55 artigos, teses e dissertações.
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1. Cálculo de faixas de parâmetro para o ajuste robusto do ganho de controladores de sistemas de potência
O presente trabalho propõe uma ferramenta computacional para auxiliar engenheiros de sistemas de potência no ajuste em campo de controladores de amortecimento e reguladores automáticos de tensão. A abordagem proposta gera faixas de valores de parâmetros para o ajuste em campo dos controladores do sistema. As faixas de valores geradas teoricamente garant
Sba: Controle & Automação Sociedade Brasileira de Automatica. Publicado em: 2012-06
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2. Estabilidade e estabilização de uma classe de sistemas não-lineares sujeitos a saturação
This work addresses the problem of stability analysis and stabilization of nonlinear rational systems subject to saturation. The approach used in this study is based on the differential algebraic representation (DAR) of rational systems and on a modified version of the generalized sector condition to deal with saturation. First, methods to characterize the s
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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3. Sistema automático de supervisão e controle de cultivos de alta densidade celular de E. coli recombinante
Cultivos de alta densidade celular de E. coli recombinante constituem uma tecnica rapida e economica para producao de proteinas recombinantes. Por meio deste bioprocesso, sao obtidos produtos de alto valor agregado e de grande importancia na industria farmaceutica, tais como insulina, hormonios de crescimento humano e bovino, antigenos proteicos para formula
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/12/2011
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4. Emissão óptica de plasma e desenvolvimento de a-Si:H por sputtering / Emissão óptica de plasma e desenvolvimento de a-Si:H por sputtering
A utilização do silício amorfo (a-Si) como camada emissora nas células fotovoltaicas baseadas em heteroestruturas tem se mostrado com várias vantagens em nível de custo de produção e desempenho se comparadas ao silício cristalino (c-Si). Em filmes de a-Si puro, existe uma grande concentração defeitos, aproximadamente 10 por cm e o hidrogênio exer
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/04/2011
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5. Delay-dependent anti-windup loops for enlarging the stability region of time delay systems with saturating inputs
Publicado em: 2011
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6. 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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7. 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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8. 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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9. 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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10. Stability analysis and stabilization of systems presenting nested saturations
This note addresses the problems of stability analysis and stabilization of systems presenting nested saturations. Depending on the open-loop stability assumption, the global stability analysis and stabilization problems are considered. In the (local) analysis problem, the objective is the determination of estimates of the basin of attraction of the system.
Publicado em: 2011
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11. Antiwindup design with guaranteed regions of stability : an LMI-based approach
This note addresses the design of antiwindup gains for obtaining larger regions of stability for linear systems with saturating inputs. Considering that a linear dynamic output feedback has been designed to stabilize the linear system (without saturation), a method is proposed for designing an antiwindup gain that maximizes an estimate of the basin of attrac
Publicado em: 2011
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12. Polyhedral regions of local stability for linear discrete-time systems with saturating controls
The study and the determination of polyhedral regions of local stability for linear systems subject to control saturation is addressed. The analysis of the nonlinear behavior of the closed-loop saturated system is made by dividing the state space in regions of saturation. Inside each of these regions, the system evolution can be represented by a linear syste
Publicado em: 2011