DocumentCode
805122
Title
An approximate root locus method in the 
plane for sampled-data systems
Author
Koziol, J., Jr.
Author_Institution
NASA Electronics Research Center, Cambridge, MA, USA
Volume
16
Issue
1
fYear
1971
fDate
2/1/1971 12:00:00 AM
Firstpage
101
Lastpage
102
Abstract
An approximate plane is derived from the 
plane for analyzing sampled-data systems. Constant frequency and constant damping-ratio loci are first mapped onto the plane. A simple transformation of the -plane coordinates to -plane coordinates is then constructed, and sampling frequency boundaries are specified wherein interpretation in the plane becomes identical to that in the plane. Hence -plane results can be obtained quickly for those system frequencies within the specified boundaries.
plane is derived from the plane for analyzing sampled-data systems. Constant frequency and constant damping-ratio loci are first mapped onto the plane. A simple transformation of the -plane coordinates to -plane coordinates is then constructed, and sampling frequency boundaries are specified wherein interpretation in the plane becomes identical to that in the plane. Hence -plane results can be obtained quickly for those system frequencies within the specified boundaries.Keywords
Linear systems, time-invariant discrete-time; Poles and zeros; Aerospace control; Automatic control; Control systems; Frequency; Helicopters; Open loop systems; Sampling methods; Stability; Strips; TV;
fLanguage
English
Journal_Title
Automatic Control, IEEE Transactions on
Publisher
ieee
ISSN
0018-9286
Type
jour
DOI
10.1109/TAC.1971.1099631
Filename
1099631
Link To Document