NDLI: Controller tuning freedom under plant identification uncertainty: double Youla beats gap in robust stability

Content Provider	IEEE Xplore Digital Library
Author	Douma, S.G. Van den Hof, P.M.J. Bosgra, O.H.
Copyright Year	2001
Description	Author affiliation: Dept. of Appl. Phys., Delft Univ. of Technol., Netherlands (Douma, S.G.)
Abstract	In iterative schemes of identification and control one of the particular and important choices to make is the choice for a model uncertainty structure, capturing the uncertainty concerning the estimated plant model. This is typically done in some norm-bounded form, in order to guarantee robust stability and/or robust performance when re-designing the controller. Structures that are used in the recent literature encompass include the gap metric uncertainty, coprime factor uncertainty, and Vinnicombe gap metric uncertainty. In this paper we study the effect of these choices when our aim is to maximize the (re)tuning freedom for a present controller under conditions of robust stability. Particular attention is given to the representation of plant uncertainty and controller tuning freedom in terms of Youla parameters. This so-called double Youla parametrization provides a norm-bounded set of robustly stabilizing controllers that is larger than corresponding sets that are achieved by using any of the other uncertainty structures.
Sponsorship	American Autom. Control Council
Starting Page	3153
Ending Page	3158
File Size	524620
Page Count	6
File Format	PDF
ISBN	0780364953
ISSN	07431619
DOI	10.1109/ACC.2001.946406
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-06-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	American Automatic Control Council(AACC)
Subject Keyword	Uncertainty Robust control Robust stability Linear feedback control systems Control system synthesis Control design Algorithm design and analysis Signal processing Physics Mechanical engineering
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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