%0 Journal Article %A Takashi Mitsuishi and Koji Saigusa %D 2014 %J International Journal of Computer and Information Engineering %B World Academy of Science, Engineering and Technology %I Open Science Index 94, 2014 %T Defuzzification of Periodic Membership Function on Circular Coordinates %U https://publications.waset.org/pdf/9999436 %V 94 %X This paper presents circular polar coordinates transformation of periodic fuzzy membership function. The purpose is identification of domain of periodic membership functions in consequent part of IF-THEN rules. Proposed methods in this paper remove complicatedness concerning domain of periodic membership function from defuzzification in fuzzy approximate reasoning. Defuzzification on circular polar coordinates is also proposed. %P 1288 - 1291