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H fault detection for linear discrete time-varying systems with delayed state

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3 Author(s)
H. Zhao ; School of Control Science and Engineering, Shandong University, 73 Jingshi Road, Jinan 250061, People's Republic of China ; M. Zhong ; M. Zhang

This study deals with the problem of H fault detection for linear discrete time-varying systems with delayed state in the framework of H filtering. The design of the H fault detection filter (FDF) is firstly converted into the minimum problem of an indefinite quadratic form. After introducing a corresponding Krein space stochastic system and building a relationship with projection, a sufficient and necessary condition on the existence of the minimum is derived by applying innovation analysis. A solution to the H-FDF is obtained in terms of matrix difference equations. Numerical examples are given to demonstrate the effectiveness of the proposed method.

Published in:

IET Control Theory & Applications  (Volume:4 ,  Issue: 11 )