Realization of PID Control by Fuzzy Inference Method and its Application to Hybrid Control

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  • ファジィ推論法によるPID制御の実現とそのハイブリッド制御への適用
  • ファジィ スイロンホウ ニヨル PID セイギョ ノ ジツゲン ト ソノ ハイ

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Abstract

First, we propose a more practical method for realizing nonlinear and linear PID controls by a fuzzy inference method. By applying a simplified indirect method of a fuzzy inference method to a few fuzzy control rules of a simple structure, not only nonlinear PID) control based on a PID controller but also linear PID control can be more simply realized than by previous methods. Next, we propose a hybrid control in which fuzzy and PID controls are hybridized for the purpose of trying mutual compensation of both controls. In this proposal, fuzzy control (nonlinear PID control) and PID) control (linear PID control), which are realized by the simplified indirect method of a fuzzy inference method, are combined in parallel and used alternately. The main practical characteristics of this method are as follows: high-speed control can be realized by applying the simplified indirect method of a fuzzy inference method; and the smoothness of switching control can be guaranteed by fuzzy-switching of fuzzy and PID controls.

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