Speed Control of Automobile by Fuzzy Logic Controller

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  • Fuzzy Logic コントローラによる自動車の速度制御
  • Fuzzy Logic コントローラ ニ ヨル ジドウシャ ノ ソクド セイギ

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Abstract

This paper deals with the speed control of automobile by a fuzzy logic controller. The purposes of the speed control are to reduce the fatique which a driver receives during long time driving, to save the gasoline consumption, and to keep on driving at the constant speed. For these purposes, the fuzzy logic controller is designed. This fuzzy logic controller is constructed of the linguistic control rules which are conditional linguistic statements expressing the relationship between inputs and outputs of the controlled system. The inputs of controller are the “error” which is the difference between the present speed and the set point, the first difference and the second difference of “error”. The output of controller, that is the manipulated variable, is obtained by using Tsukamoto's fuzzy reasoning.<br>We discuss the results of computer simulations and road tests of an automobile (TOYOPET CROWN '70) equipped with microcomputer from the standpoints of control performance, fluctuation in manipulated variable, saving gasoline consumption, and comfortability of driving. And we also discuss the usefulness of fuzzy logic controller applied to the speed control system.

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