Robust reliable H∞ control for time-varying uncertain systems with time-delay

This paper is concerned with the robust reliable H_∞ controller design problem for a class of nonlinear time-varying uncertain systems with time-delay and unknown nonlinear disturbances. The linear memoryless dynamic output feedback controller based on a state observer is designed such that, for all admissible uncertainties as well as actuator failures occurring among a prescribed subset of actuators, the closed-loop system is quadratically stable with an H_∞ norm bound constraint. An illustrative example and simulation results are given to demonstrate the effectiveness of this method.