ADAPTIVE CONTROL REDESIGN FOR NONLINEAR SAMPLED-DATA SYSTEMS

Semi-global practical stabilization of a general class of nonlinear sampled-data feedback control systems with unknown parameter is addressed. Due to the appearance of powers series of the unknown parameter in the analytic development of the exact discretized systems, an overparameterization is realized for the adaptive law. Then, sufficient conditions for the design of a high order controller are given, based on the Lyapunov analysis, that guarantees the desired stability properties.