A Fuzzy Resoning for Servo System by $\alpha$-Level Set Decomposition and Hardware Implementation

$\alpha$-레벨집합 분해에 의한 서보시스템용 퍼지추론과 하드웨어

In this paper we propose a calculation method for fuzzy control based on quantized $\alpha$-cut decomposition of fuzzy sets. This method is easy to be implemented in analog hardware. The effect of quantization levels on defuzzified fuzzy inference results is investigated. A few quantization levels are sufficient for fuzzy control. The hardware implementation of this calculation method and the defuzzification by gravity center method by PWM are also presented.