標題: Gain-phase margin analysis of dynamic fuzzy control systems
作者: Perng, JW
Wu, BF
Chin, HI
Lee, TT
電控工程研究所
Institute of Electrical and Control Engineering
關鍵字: fuzzy control;limit cycle;gain-phase margin;describing function;parameter plane
公開日期: 1-Oct-2004
摘要: In this paper, we apply some effective methods, including the gain-phase margin tester, describing function and parameter plane, to predict the limit cycles of dynamic fuzzy control systems with adjustable parameters. Both continuous-time and sampled-data fuzzy control systems are considered. In general, fuzzy control systems are nonlinear. By use of the classical method of describing functions, the dynamic fuzzy controller may be linearized first. According to the stability equations and parameter plane methods, the stability of the equivalent linearized system with adjustable parameters is then analyzed. In addition, a simple approach is also proposed to determine the gain margin and phase margin which limit cycles can occur for robustness. Two examples of continuous-time fuzzy control systems with and without nonlinearity are presented to demonstrate the design procedure. Finally, this approach is also extended to a sampled-data fuzzy control system.
URI: http://dx.doi.org/10.1109/TSMCB.2004.831772
http://hdl.handle.net/11536/26335
ISSN: 1083-4419
DOI: 10.1109/TSMCB.2004.831772
期刊: IEEE TRANSACTIONS ON SYSTEMS MAN AND CYBERNETICS PART B-CYBERNETICS
Volume: 34
Issue: 5
起始頁: 2133
結束頁: 2139
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