Simple adaptive robust output tracking controllers for uncertain nonlinear time-delay systems with dead-zone input

The output tracking control problem is considered for a class of uncertain nonlinear systems with time delays and dead-zone inputs. A simple design method is proposed so that a class of adaptive robust output tracking control laws can be synthesized. In particular, the synthesized controllers have a rather simple structure, and can be easily realized in practical engineering control systems. In this paper, the dead-zone input is nonsymmetric and its information is assumed to be completely unknown. In addition, a numerical example is given to describe the design procedure of the proposed method, and the simulations of this numerical example are implemented to demonstrate the validity of the developed theoretical results.