Switched PD-like controllers for first order unstable systems with time delay
Date
2009
Authors
Advisor
Instructor
Source Title
Proceedings of the 8th IFAC Workshop on Time Delay Systems, TDS 2009
Print ISSN
1474-6670
Electronic ISSN
Publisher
IFAC
Volume
42
Issue
14
Pages
408 - 413
Language
English
Type
Conference Paper
Journal Title
Journal ISSN
Volume Title
Abstract
A new method is proposed for the design of PD-like (first order stable) controllers for switched first order unstable systems with time delays. For this purpose, a dwell-time based stability condition of Yan and Özbay (2008) is used for the class of switched time delay systems studied here. The proposed method finds the values of PD-like controller parameters which minimize an upper bound of the dwell time, minimum time needed between the switching instants to preserve stability. The conservatism analysis of this method is done by time domain simulations. The results show that the calculated upper bound for the dwell time is close to the lower bound of the dwell time observed by simulations.
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Keywords
Dwell time, PD control, Stability analysis, Switched systems, Time delay, Controller parameter