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

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3 Author(s)
Zhao, H. ; Sch. of Control Sci. & Eng., Shandong Univ., Jinan, China ; Zhong, M. ; Zhang, M.

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:

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