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Robust anti-windup against LTI uncertainty using frequency dependent IQCs
R.M. Morales,W.P. Heath,G. Li 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
This paper will present a study on the robustness of anti-windup systems where the plantun certainty can be expressed by LTI norm-bounded operators. The treatment is constructed under the IQC framework of Megretski and Rantzer. Robustness of anti-windup systems against LTI uncertainty using frequency dependent IQCs are less conservative than those where plant uncertainty is addressed by statc IQCs. They can how ever increase significantly the computational burden in the algorithms. The papers hows that sufficient conditions for robustness of anti-windup systems against LTI uncertainty can be, in some circumstances, greatly simplified. They can also be expressed in the frequency domain and interpreted graphically. The test is finally exploited for anti-windup tuning.