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Automatica, Vol.45, No.3, 842-846, 2009
D-stability and D-stabilization of linear discrete time-delay systems with polytopic uncertainties
Sufficient conditions for D-stability and D-stabilization of linear discrete time-delay systems with polytopic uncertainties are proposed in this paper. The results are based on parameter-dependent Lyapunov functions obtained from the feasibility of a set of linear matrix inequalities defined at the vertices of polytopic systems. These conditions guarantee all the poles of a corresponding system in a specified circular region. Finally, an illustrative example shows that the proposed conditions are effective to check the D-stability and to design the D-stabilizing controller for linear discrete time-delay systems. (C) 2008 Elsevier Ltd. All rights reserved.
Keywords:D-stability;D-stabilization;Linear discrete time-delay system;Polytopic uncertainty;Linear matrix inequality (LMI)