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Efficient Computation of a Guaranteed Robustness Margin

Authors:Biannic Jean-Marc, ONERA/DCSD - BP 4025, France
Ferreres Gilles, ONERA/DCSD - BP 4025, France
Topic:2.5 Robust Control
Session:Robustness Analysis I
Keywords: Robustness analysis, structured singular value, repeated parametric uncertainties, flexible systems

Abstract

A computationally very efficient method is proposed to compute aguaranteed robustness margin, by combining methods which compute aguaranteed mu upper bound over a frequency interval and thosewhich eliminate frequency intervals inside which mu is lessthan a treshold. The mu upper bound is computed at severalfrequency points simultaneously either using the LMI Control Toolbox or the mu Analysis and Synthesis Toolbox. The method comparesvery favorably with existing mu methods. The algorithm isavailable on the web as part of the new version of the Skew Mu Toolbox.