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Title: Fault detection and isolation of MIMO nonlinear systems based on the cascade observer
Authors: Wang, J
Zhou, YM
Tsang, KM 
Keywords: Block observer
Equivalent output injection
Fault detection and isolation
Sliding mode control
Issue Date: 2005
Publisher: 華南理工大學出版社
Source: 控制理论与应用 (Control theory & applications), 2005, v. 22, no. 2, p. 237-242 How to cite?
Journal: 控制理论与应用 (Control theory & applications) 
Abstract: This paper considers the application of a block-observable method to the problem of fault detection and isolation. First, a block-observable form of nonlinear systems is introduced. The cascade observer of the system can be obtained by decoupling the system into blocks according to the faults of the sensor and the performer. The observer error can be got through the application of the sliding mode state observer. The observer designed in this paper is applied to the problem of the fault detection and isolation of the nonlinear system. The equivalent output injection concept can explicitly reconstruct fault signals, in which the problem of the fault diagnosis for multi-input and output nonlinear system will be decoupled. The isolation of the sensor fault is obtained in the system of an asynchronous motor, and the result of the simulation validates the algorithm.
ISSN: 1000-8152
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