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应用着色Petri网对复杂的多阶段、多产品生产过程的炼钢连铸制造流程进行建模.该模型具有直观的图形表示、方便分析模型性质和仿真模型性能等优点.重点讨论了建模的两个关键问题:通过不同的运输变迁设置不同的看守函数实现路径选择;通过编制单体工序变迁的输入输出函数实现不同产品的不同处理时间.采用发生图验证了模型的有界性约束,并基于发生图提出一个求解最小makespan的最优调度方法.实例应用表明了该方法的有效性.
The colored Petri nets are used to model the manufacturing process of steel-making and continuous casting in complex multi-stage and multi-product manufacturing process.The model has the advantages of intuitive graphical representation, convenient analysis of the properties of the model and the performance of the simulation model, etc. Focusing on the modeling Two key issues are: setting different guarded functions through different transportation changes to realize route selection; implementing different processing time of different products by compiling input-output function of single process change; boundedness constraints of model are verified by Based on the genesis graph, an optimal scheduling method for solving minimum makespan is proposed. The example application shows the effectiveness of the method.