Proceedings of the Korean Institute of Intelligent Systems Conference (한국지능시스템학회:학술대회논문집)

Korean Institute of Intelligent Systems (한국지능시스템학회)
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Analysis and Auto-tuning of Scale Factors of Fuzzy Logic Controller

  • Lee, Chul-Heui (Dept. of Electrical Engineering, Kangwon National University) ;
  • Seo, Seon Hak (Dept. of Electrical Engineering, Kangwon National University)
  • Published : 1998.06.01
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Abstract

In this paper, we analyze the effects of scaling factors on the performance of a fuzzy logic controller(FLC). The quantitative relation between input and output variables of FLC is obtained by using a qualsi-linear fuzzy model, and an approximate transfer function of FLC is dervied from the comparison of it with the conventional PID controller. Then we analyze in detail the effects of scaling factor using this approximate transfer function and root locus method. Also we suggest an on-line tuning method for scaling factors which employs an sample performance function and a variable reference for tuning index.

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