YANG Shipin, HUANG Zhen, LI Lijuan, SONG Jianquan, YE Jing, WANG Hui. A deep dive diagnostic and correction algorithm for mismatched sub-models in complicated chemical processes[J]. CIESC Journal, 2019, 70(4): 1485-1493
YANG Shipin, HUANG Zhen, LI Lijuan, SONG Jianquan, YE Jing, WANG Hui. A deep dive diagnostic and correction algorithm for mismatched sub-models in complicated chemical processes[J]. CIESC Journal, 2019, 70(4): 1485-1493DOI: 10.11949/j.issn.0438-1157.20180907.
A deep dive diagnostic and correction algorithm for mismatched sub-models in complicated chemical processes
In the processes of complicated chemical production
the appearance of model mismatch in multivariable predictive control systems usually will cause fluctuations in product quality. To deal with this problem
a deep dive mismatched sub-models diagnostic method and its correction algorithm are proposed. Considering that the control variable is the combined responses of the control channel and the disturbance channel in industrial field
by the successive moving of the operational variables into disturbance channel
we evaluate the impact of the moving on the quality index of the model
then identify the source of the mismatched sub-model according to its performance judging. Furthermore
the historical data were used to identify the details of the mismatched parts of the model by the autoregressive moving average model identification method
so that the original sub-model can be corrected. The dynamic simulation of the experiment was carried out by Wood-Berry distillation process. The results demonstrate the effectiveness of the algorithm.
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