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Title: An alternative approach to anti-windup in anticipation of actuator saturation
Authors: Turner, Matthew C.
Sofrony, J.
Herrmann, G.
First Published: 1-Aug-2016
Publisher: Wiley, International Federation of Automatic Control (IFAC)
Citation: International Journal of Robust and Nonlinear Control, 2016
Abstract: 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.
DOI Link: 10.1002/rnc.3609
ISSN: 1049-8923
eISSN: 1099-1239
Version: Post-print
Status: Peer-reviewed
Type: Journal Article
Rights: Creative Commons “Attribution Non-Commercial No Derivatives” licence CC BY-NC-ND, further details of which can be found via the following link: Archived with reference to SHERPA/RoMEO and publisher website.
Description: 12 month embargo
Appears in Collections:Published Articles, Dept. of Engineering

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