Output feedback control for a class of output-constrained nonlinear systems

This paper is concerned with the problem of output feedback stabilization for a class of output-constrained nonlinear systems that are dominated by a lower triangular system. Firstly, an observer based output feedback control scheme is proposed using the dynamic gain control design approach. Then, based on the property of Barrier Lyapunov Functions and Lyapunov stability theory, the asymptotic stability of the closed-loop system is analyzed and the output constraint is not violated. Finally, an example is given to show that the proposed design procedure is very simple and efficient.