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10/16/01 15:24
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#15733 - RE: Does this algo qualify as Fuzzy Logic?
thanks Bert
Initially i thought so too, but then I noticed a few differences:

A P-type controller would have the form:

Controller Output (DAC) = Deviation * k

where k = gain = (100/Proportional Band)

P-type control also has a problem with Load changes, where an offset(deviation from setpoint) is introduced. The offset cannot be rectified by P-control alone.

My algorithm does not have this problem (as i have observed practically), especially since the application it was meant for has a lot of load changes.

I think it can basically be qualified as a crude PI velocity algorithm (the corrective action is proportional to the error but it increases as the error persistence time increases).

My question was to whether my implementation of it can be qualified as Fuzzy, since I have apparently "fuzzified" the deviation and the corrective response into a few broad discrete steps.

I think I'll have to go back to the Liptak book to re-learn the basics of control systems :D

Kundi

List of 9 messages in thread
TopicAuthorDate
Does this algo qualify as Fuzzy Logic?            01/01/70 00:00      
RE: Does this algo qualify as Fuzzy Logic?            01/01/70 00:00      
RE: Does this algo qualify as Fuzzy Logic?            01/01/70 00:00      
RE: Does this algo qualify as Fuzzy Logic?            01/01/70 00:00      
RE: Does this algo qualify as Fuzzy Logic?            01/01/70 00:00      
RE: Does this algo qualify as Fuzzy Logi            01/01/70 00:00      
RE: Does this algo qualify as Fuzzy Logi            01/01/70 00:00      
RE: Does this algo qualify as Fuzzy Logic?            01/01/70 00:00      
RE: Does this algo qualify as Fuzzy Logic?            01/01/70 00:00      

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