Parameter plane analysis of fuzzy vehicle steering control systems

Hung I. Chin, Jau Woei Perng, Bing-Fei Wu

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


The main purpose of this paper is to analyze the robust stability for a fuzzy vehicle steering control system. In general, fuzzy control system is a nonlinear control system. Therefore, the fuzzy controller may be linearized by the use of describing function first. After then, parameter plane method is then applied to determine the conditions of robust stability when the system has perturbed or adjustable parameters. A systematic procedure is proposed to solve this problem. The effects of plant parameters and control factors are both considered here. Furthermore, the problem of relative stability by using a gain-phase margin tester is also addressed. The limit cycles provided by a static fuzzy controller can be easily suppressed if the control factors are chosen properly. Simulation results show the efficiency of our approach.

Original languageEnglish
Pages (from-to)59-64
Number of pages6
JournalWSEAS Transactions on Circuits and Systems
Issue number2
StatePublished - 1 Feb 2005


  • Describing function
  • Fuzzy control
  • Gain-phase margins
  • Limit cycle
  • Parameter plane
  • Vehicle steering system

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