Design of Robust Adaptive Observer for Nonlinear Large-Scale Systems

HU Xueshu; LIU Yusheng

Volume 39 Issue 6

Dec. 2010

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INFORMATION AND CONTROL > 2010 > 39(6): 707-713.

HU Xueshu, LIU Yusheng. Design of Robust Adaptive Observer for Nonlinear Large-Scale Systems[J]. INFORMATION AND CONTROL, 2010, 39(6): 707-713.

Citation:

HU Xueshu, LIU Yusheng. Design of Robust Adaptive Observer for Nonlinear Large-Scale Systems[J]. INFORMATION AND CONTROL, 2010, 39(6): 707-713.

Citation:

HU Xueshu, LIU Yusheng. Design of Robust Adaptive Observer for Nonlinear Large-Scale Systems[J]. INFORMATION AND CONTROL, 2010, 39(6): 707-713.

Design of Robust Adaptive Observer for Nonlinear Large-Scale Systems

School of Electrical Engineering and Information, Sichuan University, Chengdu 610065, China

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Received Date: November 08, 2009
Revised Date: April 01, 2010
Published Date: December 19, 2010

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Abstract

Abstract

A robust adaptive observer is proposed for nonlinear large-scale systems with unknown parameters,disturbances and unmodeled dynamics.A dynamic signal is introduced for each subsystem to dominate the unmodeled dynamics independently and an adaptive nonlinear damping is used to counter the effects of the interconnections.With the proposed observer,estimating the unknown parameters and solving linear matrix inequalities are not needed.It is proved theoretically that the observer's errors are uniformly bounded and the estimation errors can be made arbitrarily small by choosing some design parameters appropriately.
- large-scale system,
- adaptive observer,
- unmodeled dynamics,
- robustness

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