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A mixed active and passive GLR test for a fault tolerant control system Cover

A mixed active and passive GLR test for a fault tolerant control system

Open Access
|Mar 2012

Abstract

This paper presents an adaptive Generalized Likelihood Ratio (GLR) test for multiple Faults Detection and Isolation (FDI) in stochastic linear dynamic systems. Based on the work of Willsky and Jones (1976), we propose a modified generalized likelihood ratio test, allowing detection, isolation and estimation of multiple sequential faults. Our contribution aims to maximise the good decision rate of fault detection using another updating strategy. This is based on a reference model updated on-line after each detection and isolation of one fault. To reduce the computational requirement, the passive GLR test will be derived from a state estimator designed on a fixed reference model directly sensitive to system changes. We will show that active and passive GLR tests will be mixed and give interesting results compared with the GLR of Willsky and Jones (1976), and that they can be easily integrated in a reconfigurable Fault-Tolerant Control System (FTCS) to asymptotically recover the nominal system performances of the jump-free system.

DOI: https://doi.org/10.2478/v10006-012-0001-1 | Journal eISSN: 2083-8492 | Journal ISSN: 1641-876X
Language: English
Page range: 9 - 23
Published on: Mar 22, 2012
Published by: University of Zielona Góra
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year

© 2012 Hicham Jamouli, Mohamed El Hail, Dominique Sauter, published by University of Zielona Góra
This work is licensed under the Creative Commons License.

Volume 22 (2012): Issue 1 (March 2012)