Air Separation Unit Production Process Intelligent Control Based on Predictive Fuzzy Control

On the basis of analyzing production characteristics of air separation unit, predictive fuzzy control algorithm was proposed combining predictive control with fuzzy control. In the algorithm, predictive control was responsible for control accuracy and fuzzy control was to provide control variables when predictive model was not convergent as well as uncorrected control variables when the model had converged. A good control of air separation unit with characteristics of large inertia and time delay was obtained by application of the algorithm. The practical running indicates that the algorithm has good control performance and great practical value.