Semiglobal Practical Stabilization of a Class of Nonlinear Systems with Parametric Uncertainty

This paper investigates the semi global practical stabilization problem of a class of nonlinear systems with parametric uncertainty. In particular, for uncertain systems presenting a cascade structure where the zero-input dynamics of the deriving system is linear, the paper presents a feedback control law and conditions ensuring semi global practical stability, assuming that the ncertainty is bounded. The tuning parameter is a control gain. A simulation example is given to illustrate the theoretical developments.