Semiglobal Stabilization via Output-feedback for a Class of Uncertain Nonlinear Systems

This paper considers the semiglobal stabilization via output-feedback for a class of uncertain nonlinear systems. Different from the existing results, the systems under investigation possess more serious nonlinearities and unknown control coefficients which substantially increase the difficulty of output-feedback controller design. Combining the backstepping method and output-feedback domination approach, a semiglobal stabilizing controller is explicitly given, which can guarantee that the closed-loop system achieves the semiglobal asymptotic stability under the appropriate choice of design parameter. A simulation example validates the theoretical results and the proposed approach.