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PD+I Fuzzy Controller Using Error-Accumulating Applying Factor

오차적분 적용계수를 이용한 PD+I 퍼지제어기

  • Chun, Kyung-Han (Dept.of Electronics Engineering, Kyungpook National University) ;
  • Lee, Yun-Jung (Dept.of Electronics Electrical Computer, Kyungpook National University) ;
  • Park, Bong-Yeol (Dept.of Electronics Electrical Computer, Kyungpook National University)
  • 전경한 (경북대학교 전자공학과) ;
  • 이연정 (경북대학교 전자전기컴퓨터학부) ;
  • 최봉열 (경북대학교 전자전기컴퓨터학부)
  • Published : 2002.03.01

Abstract

In this paper, we Propose a PD+I fuzzy controller using an error-accumulating applying factor. In fuzzy control, analytical study was done formerly, in which fuzzy control can be classified by PD type and PI type, and also the study for getting merits of both types was done, too. But the mixed type has a complex structure and many parameters. The proposed fuzzy controller is 2-input 2-out-put and PD type fuzzy control is used as a basic structure. And the proposed controller annihilates a steady-state error and improves transient responses because of using the error-accumulating applying factor which is determined in the real time along the current state of controlled process. Futhermore it is easy to tune the system because of decreasing the number of scaling factors and the I type controller with resetting resolves the integral wind-up problem. Finally we apply the proposed scheme to various plants and show the performance betterment.

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