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Proceedings Paper

Automatic design of fuzzy systems using genetic algorithms and its application to lateral vehicle guidance
Author(s): Thomas Hessburg; Michael Lee; Hideyuki Takagi; Masayoshi Tomizuka
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Paper Abstract

A method of tuning a fuzzy logic controller (FLC) by a genetic algorithm (GA) is proposed for lane following maneuvers in an automated highway system. The GA simultaneously determines the shape of membership functions, number of rules, and consequent parameters of the FLC. The GA approach operates on binary representations of FLCs and uses an expression for a fitness score to be maximized, which takes into account the tracking error, yaw rate error, lateral acceleration error, rate of lateral acceleration, front wheel steering angle, and rate of front wheel steering angle, to find an optimal controller. Apriori knowledge about both the physical application and FLCs is incorporated into the design method to increase the performance of the design method and the resulting controller. The controllers designed by this method are compared in simulation to a conventional PID controller, a frequency shaped linear quadratic controller, and previously designed FLCs tuned manually.

Paper Details

Date Published: 22 December 1993
PDF: 12 pages
Proc. SPIE 2061, Applications of Fuzzy Logic Technology, (22 December 1993); doi: 10.1117/12.165047
Show Author Affiliations
Thomas Hessburg, Univ. of California/Berkeley (United States)
Michael Lee, Univ. of California/Davis (United States)
Hideyuki Takagi, Univ. of California/Berkeley (United States)
Masayoshi Tomizuka, Univ. of California/Berkeley (United States)

Published in SPIE Proceedings Vol. 2061:
Applications of Fuzzy Logic Technology
Bruno Bosacchi; James C. Bezdek, Editor(s)

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