APPLICATION OF FUZZY-LOGIC TO MOISTURE CONTROL IN FLUIDIZED-BED GRANULATION

Application of fuzzy logic to control of moisture content during fluid ized bed granulation is described. To avoid overshoot and to maintain control stability, a linguistic algorithm employing IF-THEN rules, wit h process lag element taken into consideration, was constructed using moisture content and its changing rate as input variables. Good respon se and stability without overshoot, which had been impossible to attai n with conventional techniques, were achieved by adopting the develope d systems. This system also maintained stability by favorable response to rapid increase in fluidization air velocity during operation.