Observer-based Non-fragile Hα Control for Singular Systems

In this paper, we deal with the problem of non-fragile observer-based H_infin output feedback controller design method for singular systems with controller and observer gain variations. The existence condition of observer-based non-fragile H_infin controller and the controller design method are presented on the basis of linear matrix inequality approach. The proposed non-fragile observer-based H_infin controller guarantees asymptotic stability, non-fragility, and H_infin norm bound in spite of existence of disturbance and controller/observer gain variations