Nonlinear bounded control for norm-bounded uncertain systems

In this paper, a method to derive a bounded continuous feedback control fun ction which stabilizes a norm bounded uncertain linear system in a certain region is proposed. The aim is to ensure a certain performance level in a neighborhood (ellipso id) of the origin, through a guaranteed cost state feedback control. Outsid e this neighborhood, a linear-like control with state-dependent gains is ob tained from the solutions of a family of parameter-dependent algebraic Ricc ati equation similar to the one arising in H-infinity control.