DocumentCode :
805122
Title :
An approximate root locus method in the 
plane for sampled-data systems
plane for sampled-data systemsAuthor :
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 :
