SHEN Shanhua, CAO Liulin, WANG Jing. Predictive control of molecular weight distribution in polymerization reaction based on moment of MWD[J]. CIESC Journal, 2013, (12): 4379-4384.
SHEN Shanhua, CAO Liulin, WANG Jing. Predictive control of molecular weight distribution in polymerization reaction based on moment of MWD[J]. CIESC Journal, 2013, (12): 4379-4384.DOI: 10.3969/j.issn.0438-1157.2013.12.016.
Molecular weight distribution (MWD) of polymer is an important performance index of quality.Due to the MWD can't be measured online
direct quality control is difficult to achieve.The combined of Legendre orthogonal polynomial and neural network had been used to build the model of the MWD
then the MWD tracking control in three-dimensionals space were decomposed the tracking control of its distribution moment in two-dimensionals time domain. The mothod
which employed the moments of distribution to predict the MWD
was proposed. The optimal objective function was based on the sum of squared errors (SSE) of the moments under certain constraints
meanwhile the correction term of the lower order moments was also introduced
in which part of the closed-loop feedback control of MWD can be obtained.The proposed control method was tested on styrene polymerization reaction in CSTR
and perfect control performance shows the effectiveness of the work.