ADAPTIVE OUTPUT-FEEDBACK DESIGN FOR A CLASS OF NONLINEAR DISCRETE-TIME-SYSTEMS

We present adaptive output-feedback schemes for a class of discrete-ti me systems whose continuous time counterparts are the output-feedback canonical form. We first develop a systematic design procedure for the deterministic ease, Global boundedness and convergence are achieved w ith no restriction imposed on the nonlinearities. Then we proceed to d evelop an analogous design procedure for the adaptive case. Depending on the characteristics of the nonlinearities, global boundedness and c onvergence can be achieved with various update laws. A rank condition is required to ensure such properties for nonlinearities which are not globally Lipchitz.