Root locus for a controller class that yields quadratic gain parameterization

2013 ◽  
Author(s):  
Brandon J. Wellman ◽  
Jesse B. Hoagg
Keyword(s):  
Root Locus

scholarly journals Root locus for SISO dead-time systems: A continuation based approach

Automatica ◽  
2012 ◽  
Vol 48 (3) ◽  
pp. 480-489 ◽  
Author(s):  
Suat Gumussoy ◽  
Wim Michiels
Keyword(s):  
Dead Time ◽  
Root Locus ◽  
Time Systems

Root-Locus Analysis of Structural Coupling in Control Systems

1959 ◽  
Vol 26 (2) ◽  
pp. 205-209
Author(s):  
R. H. Cannon
Keyword(s):  
Control System ◽  
Control Systems ◽  
Natural Frequency ◽  
Feedback System ◽  
Structural Member ◽  
Root Locus ◽  
Structural Coupling ◽  
Root Locus Analysis ◽  
Platform System ◽  
System Characteristics

Abstract When a feedback system is devised to control a mechanical member that is structurally limber, unstable (“self-excited”) vibrations may be encountered at approximately a natural frequency of the structural member. Cures are generally easy to effect once the phenomena are understood. Two interesting cases are described: ground vibrations of an airplane control system due to a limber fuselage, and vibrations of a stable platform system due to limberness in the platform structure. The investigations are carried out using the root-locus technique, which provides a plot of system characteristics as explicit functions of control strength. In the case of the stable platform, the analysis is found to be more reliable than physical intuition.

Comments on "A computer-aided root-locus method"

1981 ◽  
Vol 26 (2) ◽  
pp. 605-606 ◽  
Author(s):  
D. Ricciulli ◽  
A. Fregosi
Keyword(s):  
Root Locus ◽  
Locus Method ◽  
Computer Aided
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