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Advances in Artificial Neural Systems
Volume 2011 (2011), Article ID 453169, 10 pages
http://dx.doi.org/10.1155/2011/453169
Research Article

Early FDI Based on Residuals Design According to the Analysis of Models of Faults: Application to DAMADICS

1Department of Control Engineering, University of Mohamed Khider, Biskra 07000, Algeria
2Electrical Engineering and Automatic Control Research Group (GREAH), University of Le Havre, 25 rue Philippe Lebon, 76058 Le Havre, France
3Department of Electronics, University of Badji Mokhtar, Annaba 23000, Algeria

Received 10 May 2011; Revised 29 June 2011; Accepted 19 July 2011

Academic Editor: Paolo Gastaldo

Copyright © 2011 Yahia Kourd et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The increased complexity of plants and the development of sophisticated control systems have encouraged the parallel development of efficient rapid fault detection and isolation (FDI) systems. FDI in industrial system has lately become of great significance. This paper proposes a new technique for short time fault detection and diagnosis in nonlinear dynamic systems with multi inputs and multi outputs. The main contribution of this paper is to develop a FDI schema according to reference models of fault-free and faulty behaviors designed with neural networks. Fault detection is obtained according to residuals that result from the comparison of measured signals with the outputs of the fault free reference model. Then, Euclidean distance from the outputs of models of faults to the measurements leads to fault isolation. The advantage of this method is to provide not only early detection but also early diagnosis thanks to the parallel computation of the models of faults and to the proposed decision algorithm. The effectiveness of this approach is illustrated with simulations on DAMADICS benchmark.