期刊
AUTOMATICA
卷 40, 期 7, 页码 1181-1193出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.automatica.2004.02.018
关键词
fault diagnosis; nonlinear system; high gain observer; adaptive estimation; global convergence
An approach to fault diagnosis for a class of nonlinear systems is proposed in this paper. It is based on a new adaptive estimation algorithm for recursive estimation of the parameters related to faults. This algorithm is designed in a constructive manner through a nontrivial combination of a high gain observer and a recently developed linear adaptive observer, without resort to any linearization. Its global exponential convergence is ensured by an easy-to-check persistent excitation condition. A numerical example is presented for illustration. (C) 2004 Elsevier Ltd. All rights reserved.
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