DocumentCode
1098674
Title
Some simplifications of the graphical Nyquist criterion
Author
Vidyasagar, M. ; Bertschmann, R.K. ; Sallaberger, C.S.
Author_Institution
Dept. of Electr. Eng., Waterloo Univ., Ont., Canada
Volume
33
Issue
3
fYear
1988
fDate
3/1/1988 12:00:00 AM
Firstpage
301
Lastpage
305
Abstract
The Nyquist criterion for feedback stability is reformulated in a very simple fashion. Using the motion of positive and negative crossings, a number of encirclements of a point by the Nyquist plot can be quickly computed. With this reformulation, it is a simple matter to determine the value of the feedback gain for which the system is stable
Keywords
Nyquist criterion; feedback; stability; feedback gain; feedback stability; graphical Nyquist criterion; negative crossings; positive crossings; Algebra; Automatic control; Bioreactors; Control systems; Feedback; Regulators; Riccati equations; Robust stability; Stability criteria; Symmetric matrices;
fLanguage
English
Journal_Title
Automatic Control, IEEE Transactions on
Publisher
ieee
ISSN
0018-9286
Type
jour
DOI
10.1109/9.409
Filename
409
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