Semi-global finite-time observers for nonlinear systems

Shen, Yanjun; Xia, Xiaohua

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Semi-global finite-time observers for nonlinear systems

Shen, Yanjun; Xia, Xiaohua

URI: http://hdl.handle.net/2263/8792

Date: 2008-12

Abstract:

It is well known that high gain observers exist for single output nonlinear systems that are uniformly observable and globally Lipschitzian. Under the same conditions, we show that these systems admit semi-global and finite-time converging observers. This is achieved with a derivation of a new sufficient condition for local finite-time stability, in conjunction with applications of geometric homogeneity and Lyapunov theories.

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