Zero assignment for robust H2/H∞ fault detection filter design

Dai, Xuewu, Gao, Zhiwei, Breikin, Tim and Wang, Hong (2009) Zero assignment for robust H2/H∞ fault detection filter design. IEEE Transactions on Signal Processing, 57 (4). pp. 1363-1372. ISSN 1053-587X

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Abstract

In practical engineering, it is inevitable that a system is perturbed by noise signals. Unfortunately, H∞/H∞ filtering may fail to detect some faults when the noise distribution matrix are the same as the fault distribution matrix. In this paper, it is shown that the dynamic feedback gain of a dynamic filter introduces additional zeros to the filter, and both the filter poles and the additional zeros can be assigned arbitrarily. In order to attenuate band-limited noises, the zero assignment technique is used, and an optimal dynamic fault detection filtering approach is proposed by locating the zeros to the noise frequencies and optimizing the poles. Compared to other dynamic filter design approaches, the zero assignment technique gives a better tradeoff between more design freedom and computation costs. As shown in the simulation, a better noise attenuation and fault detection performance have been obtained. The zero assignment in multivariable fault detection filter design would be the main contribution of this paper.

Item Type:	Article
Uncontrolled Keywords:	fault distribution matrix, filter poles, noise distribution matrix, noise signals, zero assignment
Subjects:	H700 Production and Manufacturing Engineering
Department:	Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User:	EPrint Services
Date Deposited:	15 Sep 2011 09:02
Last Modified:	12 Oct 2019 19:06
URI:	http://nrl.northumbria.ac.uk/id/eprint/3332

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