Input output linearization approach to state observer design for nonlinear system

Presents a state observer for a class of nonlinear systems based on the input output linearization. While the previous result presented state observers for nonlinear systems of full relative degree, we proposed a procedure fur the design of nonlinear state observers which do not require the hypothes...

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Bibliographic Details
Published in:IEEE transactions on automatic control 2000-12, Vol.45 (12), p.2388-2393
Main Authors: Jo, N.H., Seo, J.H.
Format: Article
Language:English
Subjects:
Automatic control
Design engineering
Design methodology
Dynamical systems
Estimation error
Input variables
Linearization
Lyapunov method
Nonlinear dynamical systems
Nonlinear dynamics
Nonlinear equations
Nonlinear systems
Nonlinearity
Observers
State observers
Sufficient conditions
Variable structure systems
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Summary:Presents a state observer for a class of nonlinear systems based on the input output linearization. While the previous result presented state observers for nonlinear systems of full relative degree, we proposed a procedure fur the design of nonlinear state observers which do not require the hypothesis of full relative degree. Assuming that there exists a global state observer for internal dynamics and that some functions are globally Lipschitz, we can design a globally convergent state observer. It is also shown that if the zero dynamics are locally exponentially stable, then there exists a local state observer. An example is given to illustrate the proposed design of nonlinear state observers.
ISSN:0018-9286
1558-2523
DOI:10.1109/9.895580