Fuzzy Control Language, or FCL, is a language for implementing fuzzy logic, especially fuzzy control. It was standardized by IEC 61131-7. It is a domain-specific programming language: it has no features unrelated to fuzzy logic, so it is impossible to even print "Hello, world!". Therefore, one does not write a program in FCL, but one may write part of it in FCL.
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H462710 - Fuzzy Logic Control Example
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Matlab/Simulink 2016: Design of Fuzzy Logic Controller For Temperature Control of An Oven
Transcription
Example
RULE 0: IF (temperature IS cold) THEN (output IS low) RULE 1: IF (temperature IS very cold) THEN (output IS high)
Limitations
FCL is not an entirely complete fuzzy language, for instance, it does not support "hedges", which are adverbs that modify the set. For instance, the programmer cannot write:
RULE 0: If (Temperature is VERY COLD) then (Output is VERY HIGH)
However, the programmer can simply define new sets for "very cold" and "very high". FCL also lacks support for higher-order fuzzy sets, subsets, and so on. None of these features are essential to fuzzy control, although they may be nice to have.
External links
- fuzzyTECH, a commercial fuzzy logic development system containing the specification document for IEC1131-7 (select Fuzzy Application Library)
- IEC 1131-7 CD1 Archived 2021-03-04 at the Wayback Machine IEC 1131-7 CD1 PDF
- fuzzylite, A fuzzy logic controller library written in C++.
- Free Fuzzy Logic Library (FFLL), an implementation library written in C++.
- JFuzzyLogic, open source FCL + Fuzzy Logic Package (sourceforge, java)
- AwiFuzz, open source implementation written in C++ covering all three levels of IEC 61131-7 Fuzzy Controller Language IEC 1131-7 CD1
- pyfuzzy, open source implementation written in python.
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This page was last edited on 3 December 2022, at 04:49