Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/83099
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Type: Journal article
Title: Observer-based integrated robust fault estimation and accommodation design for discrete-time systems
Author: Zhang, K.
Jiang, B.
Shi, P.
Citation: International Journal of Control, 2010; 83(6):1167-1181
Publisher: Taylor & Francis Ltd
Issue Date: 2010
ISSN: 0020-7179
1366-5820
Statement of
Responsibility: 
Ke Zhang, Bin Jiang and Peng Shi
Abstract: In this article, a challenging issue on observer-based integrated robust fault estimation and accommodation for a class of discrete-time uncertain nonlinear systems is studied. First, a multiobjective augmented fault estimation observer (AFEO) containing an α-exponential stability performance index and an H ∞ performance index is proposed not only to guarantee the convergence speed of fault estimation but also to restrict the influence of uncertainties with respect to the fault estimation error as much as possible. Then, by introducing a slack matrix, new results are obtained to reduce the conservatism generated by the conventional multiobjective design method. Furthermore, a robust fault tolerant controller based on the dynamic output feedback is designed to guarantee the stability of the closed-loop system in the presence of faults. Moreover, the AFEO and the dynamic output feedback fault tolerant controller (DOFFTC) are designed separately and their performances are considered respectively. Finally, the simulation results of a practical system are presented to illustrate the effectiveness of the proposed design techniques.
Keywords: fault estimation; fault accommodation; discrete\-time systems; exponential stability; linear matrix inequalities
Rights: © 2010 Taylor & Francis
RMID: 0020128176
DOI: 10.1080/00207171003653029
Appears in Collections:Electrical and Electronic Engineering publications

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