Adaptive output control of nonlinear time-delayed systems with uncertain dead-zone input

In this paper, we present a new scheme to design adaptive controllers for uncertain time-delayed systems preceded by dead-zone nonlinearity. The unknown time delays have been compensated by using appropriate Lyapunov-Krasovskii functionals. The applied control effort of the backstepping design is to eliminate the effects arisen from the dead-zone nonlinearity in the input by introducing the dead-zone inverse. It is shown that the proposed controller not only can guarantee stability, but also transient performance