an:05793489
Zbl 1205.93040
An, Jiyao; Wen, Guilin; Xu, Wei
Improved results on fuzzy \(H^\infty\) filter design for T-S fuzzy systems
EN
Discrete Dyn. Nat. Soc. 2010, Article ID 392915, 21 p. (2010).
00261041
2010
j
93B36 93E11 93C42
\(H^\infty \) filter design; T-S fuzzy systems; Lyapunov-Krasovskii functional; asymptotically stable
Summary: The fuzzy \(H^\infty \) filter design problem for T-S fuzzy systems with interval time-varying delay is investigated. The delay is considered as the time-varying delay being either differentiable uniformly bounded with delay derivative in bounded interval or fast varying (with no restrictions on the delay derivative). A novel Lyapunov-Krasovskii functional is employed and a tighter upper bound of its derivative is obtained. The resulting criterion thus has advantages over the existing ones since we estimate the upper bound of the derivative of Lyapunov-Krasovskii functional without ignoring some useful terms. A fuzzy \(H^\infty \) filter is designed to ensure that the filter error system is asymptotically stable and has a prescribed \(H^\infty \) performance level. An improved delay-derivative-dependent condition for the existence of such a filter is derived in the form of linear matrix inequalities (LMIs). Finally, numerical examples are given to show the effectiveness of the proposed method.