Controladores robustos para sistemas lineares com parametros incertos

AUTOR(ES)
DATA DE PUBLICAÇÃO

1991

RESUMO

Linear time-invariant systems subject to uncertainties of the plant parameters are considered in this work. For a given controller the greatest hyperparallelopiped of uncertainty in the plant parameter space is calculated, so that the closed-loop system poles stay confined to a desired connected region in the complex plane. This is equivalent to determining the maximal interval bounds on the uncertainties of the plant parameters such that the relative stability of the system be invariant. A robustness measure of a given controller is defined from the structure adopted to the uncertainties. A design procedure is proposed in order to obtain a controller which maximizes this robustness measure. In this algorithm, the controller parameters are iteratively modified in order to augment the admissible uncertain region in the plant parameter space. The search direction for this robustification of the controller is analytically determinated. Some illustrative examples are presented

ASSUNTO(S)

industria - automação engenharia eletrica

ACESSO AO ARTIGO

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