Some control problems for uncertain time-delay T-S fuzzy models using LMI

Some robust fuzzy control problems are discussed for uncertain Takagi-Sugeno (T-S) fuzzy models with input as well as state delays. Both state feedback controllers and observer-based output feedback controllers are designed. Sufficient conditions for synthesis the robust asymptotically stability of the systems are established by LMIs forms; Furthermore, similar results are derived in the case of Lebesgue input disturbance in the T-S models. Sufficient conditions for the design of the state feedback H/sub /spl infin// control are derived for robust H/sub /spl infin// stabilization in the sense of Lyapunov asymptotic stability.