针对光纤生产中生产计划执行过程存在的生产定单产出数量不精确、完成时间难以控制等问题进行分析,提出建立基于双反馈控制和分阶段的生产调度系统对生产定单生产进行控制。该生产调度系统在光纤生产流程中设置三个反馈点:拉丝产出、筛选产出和入库,分别负责反馈生产流程各部分的生产情况,实时获得生产定单生产情况变动信息,及时掌握生产动态。通过对这些信息的处理并将其与计划相比较从而得出差异,形成调整指令,实时地控制原材料的投入量,提高生产定单产品生产数量的精确度;根据光纤生产特点将调度过程划分为两个阶段,采用不同的调度方法对定单生产进行调度,并在第二阶段引入台阶调度法,以牺牲部分控制精度的代价提高调度效率,缩短生产定单结束阶段的生产时间。案例证明所提方法的有效性。
To solve the problems existing in planning execution of fiber production processes, such as imprecise output and indefinite finishing time of production orders, the doublefeedback and phases based scheduling methodology of production system is proposed to control the production orders. It sets 3 points of feedback in fiber production process, includeing the drawbench, filer and storage operations, which are respectively responsible for feedback data in the production process, so that the real time information of production process can be obtained to master the dynamic production in time. The differences of planning data and real production date are obtained by dealing with information and comparing to production planning so that the adjusting orders are formed and the input data of material are controlled in real time to improve the accuracy of output of production order. Through studying the characters of fiber manufacturing, the scheduling process is divided into two phases which adopts respectively the different scheduling strategy of production orders. Specially, in the second phase, the step scheduling strategy is proposed to shorten production time of production orders in end phases, which sacrifices the part of control accuracy to improve scheduling efficiency. The case shows the validity of methodology proposed.