Abstract
The polymerize process is the first stage in PAN-based carbon fiber production, and its temperature control affects directly the quality and yield of the last products. It has the serious time delay character if polymerizer temperature is controlled by the mixture of the hot water and the cold one, and the polymerization process will release a lot of heat. All these make it is very complex to control the polymerizer temperature. The paper analyzes polymerizing technology firstly, then provides design and realization methods of polymerizer temperature cascade control based on generalized predictive control (GPC), and the system is realized through the control layer and the monitoring layer. The former realizes the model identification and the recursive computation in the generalized predictive control, and sends the results to the latter, and the latter realizes PID with dead-zone control of the mixed water temperature control using the results of the main regulator. The practice shows that the polymerize temperature cascade system runs well and has evident effect with effective control.
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