5 documents found

Article / Chapter
2005-11-17

A simple adaptive observer for nonlinear systems

In this note we present a high-gain observer for nonlinear uniformly observable SISO systems for which the high-gain parameter is determined adaptively on-line. The adaptation scheme is simple and universal in the sense that it is independent of the system the observer is designed for. Unlike in an earlier...
Article / Chapter
2005-11-17

Piecewise constant high-gain adaptive λ-[lambda]-tracking for higher relative...

In this paper we present an adaptive high-gain observer-based controller for linear, minimum-phase systems with known relative degree larger than one and known sign of the high-frequency gain. The adaptation scheme does not use any identification mechanism and is universal in the sense that it is independent...
Article / Chapter
2005-07-22

High-gain adaptive λ-[lambda]-tracking for nonlinear systems

It is shown that a simple modification (introducing a dead zone in the adaptation law) of the known adaptive high-gain control strategy u(t) = -k(t)y(t), k(t) = ||y(t)||2 yields lambda-tracking in the presence of output corrupted noise for a large class of reference signals and a large class of multivariable...