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On the Gain Margin of Nonlinear and Optimal Regulators
Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
1982 (English)In: Proceedings of the 21st IEEE Conference on Decision and Control, 1982, 957-962 p.Conference paper, Published paper (Refereed)
Abstract [en]

The robustness of non-linear regulators for nonlinear systems with respect to variations in gain is investigated. It is shown that there exist regulators that produce asymptotically stable closed loop systems but do not tolerate any variation in gain without instability. However, if the linearized closed loop system is also asymptotically stable, then there is always some gain margin. For a wide class of optimal regulators it is shown that the gain margin is infinite with respect to increases in gain and that decreases down to 0.5 can be tolerated. The robustness properties of linear quadratic control laws are thus generalized.

Place, publisher, year, edition, pages
1982. 957-962 p.
Keyword [en]
Robustness, Non-linear regulator, Asymptotic, Linear quadratic control
National Category
Control Engineering
Identifiers
URN: urn:nbn:se:liu:diva-102218DOI: 10.1109/CDC.1982.268287OAI: oai:DiVA.org:liu-102218DiVA: diva2:675511
Conference
21st IEEE Conference on Decision and Control, Orlando, FL, USA, December, 1982
Available from: 2013-12-04 Created: 2013-12-04 Last updated: 2014-02-20

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Glad, Torkel

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