Robust sliding mode observer design of nonlinear uncertain systems

A robust sliding mode observer for nonlinear and uncertain systems is proposed in this paper.Firstly,the state observer problem is formulated.Then,the sliding mode and control strategy are designed,which guarantees the robustness of the observer whith the nonlinearities or uncertainties of systems.The convergence rate between the observer and the system can also be adjusted by choosing suitable sliding mode manifold,so as to attain the desired performances.Finally,simulation results are presented to validate the design.