DocumentCode
860580
Title
An instability indicator for expert control
Author
Gertler, Janos ; Chang, Hong-Shun
Author_Institution
George Mason University, Fairfax, VA, USA
Volume
6
Issue
4
fYear
1986
fDate
8/1/1986 12:00:00 AM
Firstpage
14
Lastpage
17
Abstract
An instability indicator is proposed for use in supervisory/expert control systems. The indicator-which consists of a trend indicator, a rectifier, and a smoother-observes the plant output. The trend indicator generates the difference between two time averages of different final horizons and is implemented as a pair of discrete moving-average or first-order exponential filters. The rectifier is an absolute value or square operation, while the smoother is a moving-average or exponential filter, with a longer horizon/time constant. The instability alarm is triggered on the basis of the amplitude of the indicator output.
Keywords
Adaptive control; Expert systems; Stability, linear systems; Adaptive control; Adaptive systems; Automatic control; Control systems; Feedback loop; Filters; Rectifiers; Stability analysis; Time varying systems; Tuning;
fLanguage
English
Journal_Title
Control Systems Magazine, IEEE
Publisher
ieee
ISSN
0272-1708
Type
jour
DOI
10.1109/MCS.1986.1105105
Filename
1105105
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