Dynamic output feedback control of discrete-time systems with actuator nonlinearities

This paper considers the problem of stabilization of discrete-time systems with actuator nonlinearities. Specifically, dynamic output feedback control design for discrete-time systems with time-varying, sector bounded, input nonlinearities is addressed. The proposed framework is based on a linear matrix inequality approach and directly accounts for robust stability and robust performance over the class of actuator nonlinearities. Furthermore, it is directly applicable to actuator saturation control and provides dynamic output feedback controllers with guaranteed domains of attraction. The effectiveness of the approach is illustrated by a numerical example.