带缓冲区的三设备串行生产系统动态机会维护策略研究

A dynamic opportunistic maintenance policy for three-unit series production system with intermediate buffers

以采用固定周期预防维护技术并带有中间缓存区的三设备串行生产系统为研究对象,基于机会结余和组成本理论,运用动态规划方法,在组合优化的基础上,建立一种基于设备可靠性的三设备串行系统动态机会维护策略及决策优化模型。该模型克服了在当前生产系统中设备只有短期信息可用,而导致预防性维护计划制定的灵活性不足这一问题。数值试验结果表明,该模型能在控制维护成本的基础上提供有效的维护调度方案,为企业的设备维护管理决策问题提供了一种新的解决思路。

Proposes a reliability-centered dynamic opportunistic Preventive Maintenance（PM） policy for a three-unit series system,with integrating the online information of the intermediate buffers.Whenever one of the units reaches its reliability threshold,a PM action has to be performed on the unit and at that time PM opportunities arise for the other units.The optimal combined PM activities are determined by maximizing the short term cumulative Opportunistic Maintenance（OM） cost saving which is a combination of maintenance cost saving,downtime cost saving,penalty cost for advancing PM action and penalty cost for work in process.Finally,numerical examples are illustrated to show how the proposed approach works.