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Nonlinear dynamic windup detection in anti-windup compensators
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
1996 (English)In: CESA'96 IMACS Multiconference: computational engineering in systems applications, Villeneuve d'Ascq: Gerf EC , 1996, Vol. 2, p. 1014-1019Conference paper, Published paper (Refereed)
Abstract [en]

In order to get a fast servo performance and a fast attenuation of disturbance effects, it is often desirable to have a high loop gain in control-systems. Unfortunately, this may contradict to the requirement on having a low loop-gain in order not to violate the actuator limits, which could cause windup problems. The trade-off between these two can to some extent be handled by means of conventional anti-windup techniques, but in general not over a sufficient range of operation. In order to reduce the problem further, it is proposed that the fastness of the closed-loop should be continuously retuned with respect to the status of the windup phenomenon. For this purpose, a certain 'nonlinear dynamic windup detector' is proposed, which uses the actuator in- and outputs for detecting the presence of windup, and produces a 'fastness variable' as its output. It is outlined how to achieve anti-windup by utilizing this fastness variable for on-line tuning of the controller. Typically this could be done by pole-shifting.

Place, publisher, year, edition, pages
Villeneuve d'Ascq: Gerf EC , 1996. Vol. 2, p. 1014-1019
National Category
Control Engineering
Research subject
Control Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-27305Local ID: 0b846520-d14b-11db-a0b9-000ea68e967bISBN: 2-9510266-0-9 (print)OAI: oai:DiVA.org:ltu-27305DiVA, id: diva2:1000488
Conference
Symposium on control, optimization and supervision : 09/07/1996 - 12/07/1996
Note
Godkänd; 1996; 20061111 (ysko)Available from: 2016-09-30 Created: 2016-09-30Bibliographically approved

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