PURPOSE:To improve disturbance suppression characteristics by providing an integral type fuzzy control arithmetic part, a feedback type fuzzy control arithmetic part, and a feedforward type fuzzy control arithmetic part and inputting the sum of their manipulated variables to a controlled system. CONSTITUTION:The fuzzy control system is equipped with the feedforward type (FF type) fuzzy control arithmetic part 10, integral type fuzzy control arithmetic part 11, feedback type (FD type) fuzzy control arithmetic part 12, and controlled system 13 and the respective arithmetic parts 10-12 perform fuzzy reasoning arithmetic based upon specific control rules and output manipulated variables U. The integral type arithmetic part 11 finds variation in manipulated variable according to a control deviation, and the FB type arithmetic part 12 and FF type arithmetic part 10 and find variation in manipulated variable according to a controlled variable and a target value. Consequently, disturbance suppression performance and target value follow-up performance are adjusted independently and both optimized.
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