Fuzzy inference device, antecedent section member ship functional central processing unit and consequent part member ship functional central processing unit, fuzzy inference manner, antecedent section member ship functional treatment manner and consequent part member ship functional treatment manner

摘要

PURPOSE:To easily set and adjust the performance of a control system by determining the scale of a preceding item part by the history of an input signal and performing fuzzy inference based on this scale to determine the scale of a succeeding item part. CONSTITUTION:Preceding item part fundamental membership function generators 3 and 4 generate a fundamental member ship function of the preceding item part for each of input signals V1 and V2. A preceding item part membership value operating devices 5 and 6 obtain a preceding item part membership value in accordance with the fundamental membership function generated by generators 3 and 4, preceding item part scales SV1 and SV2, and input signals V1 and V2. A succeeding item part scale determining device 7 determines a scale SD of the variable axis or the settled value of the succeeding item part membership function in accordance with scales SV1 and SV2 and signals V1 and V2. A succeeding item part fundamental membership function generator 8 generates a fundamental membership function of the succeeding item part. A fuzzy relation operating part 9 outputs a settled value Y in accordance with this function, the scale SD of the succeeding item part, and the preceding item part membership value.