Automatica, Vol.44, No.3, 864-867, 2008
Improved robust backstepping adaptive control for nonlinear discrete-time systems without overparameterization
This paper reports a robust backstepping adaptive controller for output tracking of nonlinear discrete-time systems. The result improves the previous one in Zhang, Wen, and Soh [(2001). Robust adaptive control for nonlinear discrete-time systems without overparameterization. Automatica, 37, 551-558] by removing the lower bound constraints on the system nonlinearities. (C) 2007 Elsevier Ltd. All rights reserved.
Keywords:discrete-time system;time-varying system;adaptive control;nonlinear controller;parameter projection;backstepping