Robust anti-windup control of SISO systems

Kerr, Murray, Turner, Matthew and Postlethwaite, Ian (2010) Robust anti-windup control of SISO systems. In: American Control Conference (ACC) 2010, 30 June-2 July 2010, Baltimore, Maryland.

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This paper provides some perspectives on the robust anti-windup (AW) control problem by focusing on the simplest case of AW compensation for uncertain linear single-input-single-output (SISO) systems. Using Quantitative Feedback Theory (QFT)-style frequency domain analysis, and through numerical examples, it is shown that even for simple systems, certain popular AW techniques may fail to provide robust stability when saturation is encountered. A QFT-based AW method, in which uncertainty is explicitly incorporated into the design procedure, is revised to employ less conservative stability multipliers and employed to overcome these robustness deficiencies. Through a robust AW example the paper highlights: the importance of explicitly designing the AW controller to be robust to system uncertainty; the potential failure in designing for robustness based on only the nominal plant, with IMC AW shown to unstable in one case; and the significant reduction in the problem difficulty that can arise from the use of less conservative saturation multipliers.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: nominal plant , quantitative feedback theory-style frequency domain analysis , robust anti-windup control , robust stability , stability multipliers , uncertain linear single-input-single-output systems
Subjects: H900 Others in Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
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Depositing User: EPrint Services
Date Deposited: 01 Jun 2011 09:48
Last Modified: 13 Oct 2019 00:30

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