两部件系统视情维修与生产调度的联合优化模型

为了解决生产调度过程中由系统维护维修产生的资源闲置和时间成本增加问题,将系统维修与生产调度联合建模.在众多学者将系统作为整体进行生产调度与维修研究的基础上,考虑系统内各组成部件之间的复杂关系.针对具有经济相关性的两部件系统,以调度作业加工顺序、预防性维修阈值、机会维修阈值作为决策变量,考虑到两部件同时维修比单部件独立维...

Joint optimization model for condition-based maintenance and production scheduling of two-component systems

In order to solve the problem of resource idleness and time cost increase caused by system maintenance in the production scheduling process, the system maintenance and production scheduling are modelled jointly. On the basis of many scholars'' research on production scheduling and maintenance, this paper considers the complex relationship among the components in the system. Focusing on a system composed of two components with economic relevance, the processing order, preventive maintenance threshold and opportunistic maintenance threshold of scheduling jobs are taken as decision variables. At the same time, considering that the simultaneous maintenance of two components is more economical than the independent maintenance of a single component, the opportunistic maintenance is introduced into the modelling. The joint strategy of condition based maintenance and production scheduling is formulated, which contains opportunistic maintenance, preventive maintenance and corrective maintenance. All the possible maintenance requirement during the production scheduling process and their corresponding probabilities is presented, as well as the joint probability density is derived using the deterioration state space partition method. A joint optimization model is established to minimize the total weighted expected completion time. Numerical experiments and sensitivity analyses are conducted to verify the validation of the proposed strategy and established model.