IJCAS

This paper deals with the problem of H∞ fault detection for a kind of linear singular systems with time-varying delay. A generalized form of observer-based fault detection filter (FDF) is first used as a residual generator. Then the design of H∞-FDF is formulated in the framework of H∞ filtering. By applying Lyapunov-Kravoskii function approach, delay-dependent conditions on the existence of the H∞-FDF, which ensure asymptotic stability and a prescribed H∞ performance level, are derived. With the aid of a cone complementarity linearization technique, an iterative algorithm is proposed to calcu-late the parameter matrices of the H∞-FDF in terms of linear matrix inequalities. A numerical example is given to illustrate the effectiveness of the proposed algorithm.

Keywords: Fault detection, H∞ filter, linear matrix inequality, linear singular system, time-delay.