1998 Volume 11 Issue 3 Pages 136-144
Based on the idea of special purpose observers, a new approach to the observer-based stabilization of a class of nonlinear systems by means of I/O linearization is proposed. The class of the system is assumed to be I/O linearizable and Complete Uniformly Local Weakly Observable with an Input-to-State Stable internal dynamics.
The strategy considered in this paper is as follows. At first the system of interest is cascaded with a chain of integrators to extend its relative degree to system order, and then observer-based I/O linearization control law is designed to yield stability for the enlarged closed loop system.
It is shown that for implementing such a specific control law the linear structured observer is valid.