Estimation of Minimum Conditions for Forced Oscillations in Relay Feedback Systems

Lim, L. H. I., Loh, A. P. and Fu, J. (2005) Estimation of Minimum Conditions for Forced Oscillations in Relay Feedback Systems. In: 2005 International Conference on Control and Automation (ICCA2005), Budapest, Hungary, 27-29 June 2005, pp. 1262-1267. ISBN 0780391373 (doi:10.1109/ICCA.2005.1528315)

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Abstract

This paper examines the behaviour of a single loop relay feedback system (RFS) in the presence of an external forcing sinusoid. It is well known that such a closed loop system sometimes undergo a forced oscillation (FO) phenomenon while at other times, subharmonic oscillations (SO) may be observed. This paper examines the conditions under which these can occur. It was found that for either FO or SO to occur, the external forcing signal must satisfy a certain minimum amplitude. Whether a FO or SO occurs, the minimum amplitude of the external forcing signal can be determined accurately using a graphical approach and a numerical method. Simulation studies are presented to illustrate the results.

Item Type:Conference Proceedings
Additional Information:Published in '2005 International Conference on Control and Automation' Vol. 2. Copyright © 2005 by the Institute of Electrical and Electronics Engineers, Inc.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Lim, Dr Li Hong Idris
Authors: Lim, L. H. I., Loh, A. P., and Fu, J.
Subjects:Q Science > Q Science (General)
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:2005 International Conference on Control and Automation
ISSN:1948-3449
ISBN:0780391373

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