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An alternative approach to anti-windup in anticipation of actuator saturation

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journal contribution
posted on 2016-12-14, 09:30 authored by Matthew C. Turner, J. Sofrony, G. Herrmann
Traditionally, an anti-windup compensator is activated when control signal saturation occurs. An alternative approach is to activate the compensator at a level below that of the physical control constraints: the anti-windup compensator is activated in anticipation of actuator saturation. Recent studies have proposed systematic methods for the construction of such anticipatory anti-windup compensators, but a pseudo-LPV representation of the saturated system has been central to these results. This paper approaches the anticipatory anti-windup problem for open-loop stable plants using a 'non-square' sector condition, which is associated with a combination of deadzone nonlinearities. The advantage of this approach is that it leads to synthesis routines, which bear a close resemblance to those associated with traditional immediately activated anti-windup compensators. A by-product of this approach also appears to be that the arising compensators are better numerically conditioned. Some simulation examples illustrating the effectiveness of anticipatory anti-windup compensators and some comments on their wider use complete the paper.

History

Citation

International Journal of Robust and Nonlinear Control, 2016

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Engineering

Version

  • AM (Accepted Manuscript)

Published in

International Journal of Robust and Nonlinear Control

Publisher

Wiley, International Federation of Automatic Control (IFAC)

issn

1049-8923

eissn

1099-1239

Acceptance date

2016-06-25

Available date

2017-08-01

Publisher version

http://onlinelibrary.wiley.com/doi/10.1002/rnc.3609/abstract

Notes

12 month embargo

Language

en

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