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A criterion for knowledge base decoupling in fuzzy-logic control systems

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1 Author(s)
de Silva, C.W. ; Dept. of Mech. Eng., British Columbia Univ., Vancouver, BC

In a coupled rule base, more than one condition variable may link with more than one action variable within the same rule. This paper develops an analytical framework for decoupling such a rule base, with specific reference to fuzzy-logic control. The computational problem of fuzzy-logic is greatly simplified through the use of an uncoupled rule base. Conditions are derived, under which, decision making through an uncoupled rule base becomes equivalent to that through a coupled rule base. A laboratory prototype of a single-axis servo motor system which incorporates a knowledge-based tuner is employed to demonstrate the effective use of an uncoupled rule base that is equivalent to a coupled one

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Systems, Man and Cybernetics, IEEE Transactions on  (Volume:24 ,  Issue: 10 )