Delay-dependent Stability Criterion for Discrete Linear Time-delay Systems with State Saturation Nonlinearity

This paper is concerned with stability analysis for discrete linear time delay systems with state saturation nonlinearity. By introducing a free matrix whose infinity norm is less than or equal to 1, the discrete state under state saturation constraint is confined in a convex hull. In this way, a sufficient criterion for discrete linear time-delay systems with state saturation to be asymptotically stable is obtained in terms of bilinear matrix inequalities that can be solved using the presented iterative linear matrix inequality algorithm. The state feedback control law synthesis problem is also solved and the corresponding iterative linear matrix synthesis algorithm is given. Two numerical examples are used to show that the presented method is applicable and effective.