Robust fault detection in neutral time-delay systems based on H_∞ theory

The problem of observer-based robust fault detection for a class of neutral time-delay systems with uncertain disturbances was studied.The asymptotically stable condition for robust and the design of memory observer were developed based on H_∞ control theory.An linear matrix inequality approach was used to solve the gain matrix.The designed fault detection observer guarantees the restraining level γ and the L_2 gain ρ of residuals to disturbances and fault signals respectively.Thus it implies the robustness of residuals to disturbances and sensitivity to faults.Simulative example illustrates the validity of the proposed method.