Observer-based H∞ control for a class of nonlinear networked systems

This paper is concerned with the problem of robust H-infinity control for a class of uncertain networked control systems with nonlinear perturbations. The uncertainties are assumed to be time-varying and norm-bounded. The perturbations are assumed to be time-varying and satisfy global Lips-chitz conditions and appear in both the state and measurement output equations. An observer-based controller is designed, which guarantees the exponential stability and a prescribed H-infinity performance level of the closed-loop system subject to the net-work-induced delay and data dropout. Sufficient conditions on the existences of the stabilizing controller are established. The controller gains can be obtained by solving these conditions. An illustrative example is given to demonstrate the effectiveness of the proposed methods.