Newsgroups: comp.ai.genetic
Path: cantaloupe.srv.cs.cmu.edu!das-news2.harvard.edu!news2.near.net!howland.reston.ans.net!news.sprintlink.net!pipex!sunsite.doc.ic.ac.uk!dcs.gla.ac.uk!udcf.gla.ac.uk!news
From: "Yun Li, EEE Dept, Glasgow Univ" <yunli@elec.gla.ac.uk>
Subject: Re: tuning a Fuzzy controller with a GA
Message-ID: <Cz06D1.324@udcf.glasgow.ac.uk>
Sender: news@udcf.glasgow.ac.uk (News)
Organization: Glasgow University Computing Service
References:  <1994Nov8.161626.23507@news.dfrf.nasa.gov>
Date: Wed, 9 Nov 1994 13:48:36 GMT
Lines: 44

> I am toying with a fairly standard fuzzy controller (3 inputs, 1
> output) implemented in matlab. I would like to tune the membership
> functions (I'm currently using trapazoids for speed ...) with a GA I
> also have in matlab.
> 
> The hard part is trying to restrict the GA to produce "proper"
> membership sets, i.e. where the sum == 1 over the entire set. I could
> try to put a measure of how "proper" the set was in the fitness, but
> this seemed like a very indirect approach. I have read a few papers on
> integrating GA and Fuzzy for online optimization, but this usually
> means changing the form of the membership set, or the defuzzification,
> but of which I would like to remain VERY simple for real-time
> performance.
> 
> Is there a general procedure in applying a GA to a problem with 
> inter-related parameters, similar to side constraints ?
> 
> Thanks in advance !!
> 
> -- 
> 
> Joseph W. Pahle 
> F-18 HARV flight controls 
> phone: 805 258-3185
> e-mail: joep@neon.dfrf.nasa.gov 
> 
> Comment: disclaimers attract lawyers ... here boy !  
> NASA Dryden Flight Research Center, Edwards,CA
> 

We have a conference paper published in this area.  Title:

Design of sophisticated fuzzy logic controllers using GAs

It can be found in our World Wide Web server using URL:
http://www.mech.gla.ac.uk/control/

Just go to the on-line publications section.  If not successful, 
I would be happy to e-mail you the postscript file.

Best wishes,

Yun Li

