带缓冲的串行生产系统预防性维护策略

Preventive Maintenance Policy for Series Production Systems with Intermediate Buffers

为了保证产能的同时能有效降低系统单位时间运作成本,提出了带缓冲区的串行生产系统预防性维护决策模型.首先,通过分析系统运行过程中的缓冲变化,提出同时考虑上下游设备故障及其缓冲区的周期性维护策略.在此基础上,结合串行生产线的特点,以总维护成本最小化为优化目标,建立有限时间内的系统维护成本分析模型.最后,构建求解最优缓冲量和维护时刻点的演化迭代算法,并对模型进行实例分析,结果表明构建的模型是有效且实用的.

To ensure the throughput and reduce the operation cost of per unit time,a model for decisionmakings of preventive maintenances was proposed for series production systems with buffers.First,by analyzing the variation of buffer inventories,aperiodic maintenance policy was proposed by taking into account the intermediate buffer and failure of upstream and downstream equipment.Based on the descriptions mentioned above,and in view of the characteristics of series production systems,a maintenance cost model of decision-makings was established with an objective of minimizing total cost of the system over a defined time horizon.Finally,an evolution algorithm to solve the optimal buffer inventories and maintenance time point was built.The results indicate that the model is valid and practical.