Robust H∞ filter design of uncertain descriptor systems with discrete and distributed delays

Authors:
Dong Yue;Q.-L. Han
Affiliations:
Dept. of Control Sci. & Eng., Nanjing Normal Univ., Jiangsu, China;-
Venue:
IEEE Transactions on Signal Processing
Year:
2004

Citing 0
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Abstract

The robust H∞ filtering problem for a class of continuous-time uncertain linear descriptor systems with time-varying discrete and distributed delays is investigated. The time delays are assumed to be constant and known. The uncertainties under consideration are norm-bounded, and possible time-varying, uncertainties. Sufficient condition for the existence of an H∞ filter is expressed in terms of strict linear matrix inequalities (LMIs). Instead of using decomposition technique, a unified form of LMIs is proposed to show the exponential stability of the augmented systems. The condition for assuring the stability of the "fast" subsystem is implied from the unified form of LMIs, which is shown to be less conservative than the characteristic equation based conditions or matrix norm-based conditions. The suitable filter is derived through a convex optimization problem. A numerical example is given to show the effectiveness of the method.