基于策略协同优化的聚苯乙烯牌号切换方法

为优化聚合反应过程中牌号切换的过渡过程，以实验室苯乙烯连续聚合反应过程为对象，从质量和经济的角度构造多个优化目标函数，并引入针对质量指标的终点约束策略，提出一种基于策略协同的多目标优化方法来求解此牌号切换优化问题。最后从优化计算得到的Pareto解集中分别选取质量指标和经济指标均较优的方案与传统单目标优化策略进行仿真比较，仿真结果表明，该优化方法可缩短牌号切换过渡时间，减少原材料的消耗，并为企业提供多种切换方案，对实际生产具有指导意义。

Optimal grade transition for the polystyrene process based on tactical collaboration

The grade transition operation occurs frequently in the polymerization processes for producing various grades of polymer,and plays a significant role in production efficiency.The optimal grade transition of a benchscale polystyrene process is studied in this paper.Two objective functions focusing on the quality and economic indexes are constructed.In combination with a strategy dealing with the endpoint constraints on the quality index,a tactical collaboration-based multi-objective optimization strategy is proposed to solve this optimization problem.We select the schemes having optimal quality index and economic index from the Pareto set,and give a comparison of these two schemes with a single-objective optimization strategy.The sitnulation results confirm that the proposed multi-objective optimization method can shorten the transition time,reduce the raw material consumption,and provide multiple grade transition strategies.