The Research Of Fuzzy Control Method Based On Self-Adjusting Rules

This paper focuses on the research of fuzzy control, especially rule self-adjusting fuzzy control method. By theoretic analysis and simulations, the influences of parameters and system performance characteristic of some kinds of rule on-line self-regulating fuzzy control methods are discussed, and a novel real-time self-adjusting fuzzy control method (VSRSAFC) is proposed from the diagrammatic point of view. In VSRSAFC, the slope of the rectifying curve of rule scaling factor a is altered by the fine-tuning and coarse tuning combined mechanism to adjust the fuzzy control rules according to error E and error change EC, which more coincides with characteristic of system response than the conventional self-adjusting method that adjusts rule scaling factor only according to the error E, and has better static and dynamic performances than the latter.The AC frequency control experiment system based on PC has been further improved during the study for the paper on which the speed servo control experiments of AC motor adopting general rule self-adjusting fuzzy control (RSAFC), PID and VSRSAFC, respectively, are fulfilled. The experiment results verify the better effectiveness and practicability of VSRSAFC than the other two methods.