Re: Fuzzy Logic and memory

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Article #82

#82

From: Erik Horstkotte
Date: Wed, 30 Sep 1992 16:44

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In article <1992Sep29.144132.8473@csi.jpl.nasa.gov>,
mwette@csi.jpl.nasa.gov (Matt Wette) writes:
|> 
|> I've had a very limited exposure to Fuzzy Logic.  However, from
|> what
|> I've seen Fuzzy Logic is memoryless.  This seems to be a severe
|> limitation.  What is done to rectify the situation.  One
|> possibility
|> is to use state estimators.  Do others exist.  I could imagine
|> that
|> someone would want to use a dynamic logic function which maps the
|> input sets to the output sets.  Is this done?

Generally speaking, yes, fuzzy logic is memoryless.  However, you
can use feedback variables to add memory.  We've done this in a few
cases, mainly to track unobservable parameters in a system being
controlled.
-- 
Erik Horstkotte, Manager, Software Development, Togai InfraLogic,
Inc.
erik@til.til.com, uunet!til!erik - (714) 975-8522
Standard disclaimer: the preceding are my opinions, not TIL's.

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Newsgroups: sci.engr.control
Path: arc1-ca.pugleaf.net!sparky!uunet!til!maui!erik
From: erik@maui.til.com (Erik Horstkotte)
Subject: Re: Fuzzy Logic and memory
Message-ID: <1992Sep30.164459.6169@til.til.com>
Sender: erik@maui (Erik Horstkotte)
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Organization: Togai InfraLogic, Inc.
References:  <1992Sep29.144132.8473@csi.jpl.nasa.gov>
Date: Wed, 30 Sep 1992 16:44:59 GMT
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