Resumo

ARRIFANO, Natache S. D.; OLIVEIRA, Vilma A.  e  COSSI, Lúcia V.. Synthesis of an LMI-based fuzzy control system with guaranteed cost performance: a piecewise Lyapunov approach. Sba Controle & Automação [online]. 2006, vol.17, n.2, pp. 213-225. ISSN 0103-1759.  http://dx.doi.org/10.1590/S0103-17592006000200009.

A new stability analysis and design of a fuzzy switching control based on uncertain Takagi-Sugeno fuzzy systems are proposed. The fuzzy system adopted is composed by a family of local linear uncertain systems with aggregation. The control design proposed uses local state feedback gains obtained from an optimization problem with guaranteed cost performance formulated in the context of linear matrix inequalities and a fuzzy switching scheme built from local Lyapunov functions. The global stability is guaranteed by considering a class of piecewise quadratic Lyapunov functions. Examples are given to illustrate the applicability of the proposed approach.

Palavras-chave : Switching fuzzy control; Guaranteed cost fuzzy control; Uncertain Takagi-Sugeno fuzzy systems; Piecewise quadratic Lyapunov functions.