scholarly journals Frequency-domain stability analysis of retrospective-cost adaptive control for systems with unknown nonminimum-phase zeros

2011 ◽  
Author(s):  
Anthony M. D'Amato ◽  
E. Dogan Sumer ◽  
Dennis S. Bernstein
Keyword(s):  
Adaptive Control ◽  
Stability Analysis ◽  
Frequency Domain ◽  
Nonminimum Phase ◽  
Domain Stability

scholarly journals Complex-Coefficient Frequency Domain Stability Analysis Method for a Class of Cross-Coupled Antisymmetrical Systems and Its Extension in MSR Systems

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Yuan Ren ◽  
Jiancheng Fang
Keyword(s):  
Stability Analysis ◽  
Frequency Domain ◽  
Stability Criterion ◽  
Mimo System ◽  
Multiple Input Multiple Output ◽  
Complex Coefficient ◽  
Analysis Method ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Domain Stability

This paper develops a complex-coefficient frequency domain stability analysis method for a class of cross-coupled two-dimensional antisymmetrical systems, which can greatly simplify the stability analysis of the multiple-input multiple-output (MIMO) system. Through variable reconstruction, the multiple-input multiple-output (MIMO) system is converted into a single-input single-output (SISO) system with complex coefficients. The pole locations law of the closed-loop system after the variable reconstruction has been revealed, and the controllability as well as observability of the controlled plants before and after the variable reconstruction has been studied too, and then the classical Nyquist stability criterion is extended to the complex-coefficient frequency domain. Combined with the rigid magnetically suspended rotor (MSR) system with heavy gyroscopic effects, corresponding stability criterion has been further developed. Compared with the existing methods, the developed criterion for the rigid MSR system not only accurately predicts the absolute stability of the different whirling modes, but also directly demonstrates their relative stability, which greatly simplifies the analysis, design, and debugging of the control system.

A frequency domain stability analysis of a phase plane control system

1985 ◽  
Vol 8 (1) ◽  
pp. 50-55 ◽  
Author(s):  
Alexander N. Penchuk ◽  
Philip D. Hattis ◽  
Edward T. Kubiak
Keyword(s):  
Control System ◽  
Stability Analysis ◽  
Frequency Domain ◽  
Phase Plane ◽  
Domain Stability ◽  
Phase Plane Control

Global matrix method for frequency-domain stability analysis of hydropower generating system

2021 ◽  
pp. 130097
Author(s):  
Wenjie Yan ◽  
Jiebin Yang ◽  
Zhigao Zhao ◽  
Jiandong Yang ◽  
Weijia Yang
Keyword(s):  
Stability Analysis ◽  
Frequency Domain ◽  
Matrix Method ◽  
Generating System ◽  
Domain Stability
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