Abstract
AbstractThis work describes the development of a fuzzy estimator for determining copolymer composition (F1) in a semibatch solution copolymerization reactor. Membership functions, fuzzy ranges for input (ζ1 mole fraction of monomer 1 in polymerizing mass) and output (F1 mole fraction of monomer 1 in copolymer) are defined. A fuzzy rule base is constructed relating input to output, based on the operator's knowledge. A defuzzification method is selected and the non‐fuzzy values of F1 are obtained. The results are compared with the actual values of F1 which are obtained by rigorously solving the model equations of the system. The fuzzy ranges and limits for input and output are altered separately so as to test the estimator's performance. Thus obtained standard estimator is tested for other operating conditions. The developed estimator performed well also for wider operating conditions.
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