Distributed Fault Estimation Observer Design With Adjustable Parameters for a Class of Nonlinear Interconnected Systems

In this paper, a new distributed fault estimation observer with adjustable parameters is designed for a class of nonlinear interconnected systems. The presented fault estimator consists of proportional and integral terms to improve the accuracy of fault estimation. The observer gain matrices of the...

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Bibliographic Details
Published in:IEEE transactions on cybernetics Vol. 49; no. 12; pp. 4219 - 4228
Main Authors: Zhang, Ke, Jiang, Bin, Shi, Peng
Format: Journal Article
Language:English
Published: United States IEEE 01.12.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Adjustable parameters (APs)
Cybernetics
Design parameters
Fault detection
Fault diagnosis
Interconnected systems
Nonlinear systems
Observers
Parameter estimation
Quantitative analysis
robust fault estimation
Symmetric matrices
ISSN:2168-2267, 2168-2275, 2168-2275
Online Access:Get full text
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Summary:In this paper, a new distributed fault estimation observer with adjustable parameters is designed for a class of nonlinear interconnected systems. The presented fault estimator consists of proportional and integral terms to improve the accuracy of fault estimation. The observer gain matrices of the proposed fault estimation scheme for the underlying systems are calculated based on robust <inline-formula> <tex-math notation="LaTeX">{\mathcal {L}_{2}-\mathcal {L}_{2}} </tex-math></inline-formula> and <inline-formula> <tex-math notation="LaTeX">{\mathcal {L}_{2}-\mathcal {L}_\infty } </tex-math></inline-formula> performance. The proposed method achieves a lower performance level in the aspect of quantitative analysis compared with existing fault estimation approaches. A simulation example is provided to demonstrate the effectiveness of the new design method.
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ISSN:2168-2267
2168-2275
2168-2275
DOI:10.1109/TCYB.2018.2860588