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http://dx.doi.org/10.5391/JKIIS.2006.16.3.303

A method of converting fuzzy system into 2 layered hierarchical fuzzy system  

Joo Moon-G. (부경대학교 전자컴퓨터정보통신공학부)
Publication Information
Journal of the Korean Institute of Intelligent Systems / v.16, no.3, 2006 , pp. 303-308 More about this Journal
Abstract
To solve the rule explosion problem in multi input fuzzy logic system, a method of converting a given fuzzy system to 2 layered hierarchical fuzzy system is presented where the collection of the THEN-parts of the fuzzy rules of given fuzzy system is considered as vectors of fuzzy rule. At the 1 st layer, linearly independent fuzzy rule vectors generated from the given fuzzy logic system are used and, at the 2nd layer, linear combinations of these independent fuzzy rule vectors are used for fuzzy logic units at each layer. The resultant 2 layered hierarchical fuzzy system has not only equivalent approximation capability, but less number of fuzzy rules compared with the conventional fuzzy logic system.
Keywords
Hierarchical fuzzy system; fuzzy rule vector; linear combination;
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