再制造生产系统的库存缓冲与时间缓冲控制机制

Inventory-buffer and time-buffer control mechanism for remanufacturing system

从分析DBR用于解决再制造系统不确定性问题所存在的局限性入手,以发动机再制造生产系统为例,在定性分析比较库存缓冲和时间缓冲控制内涵、计算模型和适用条件的基础上,通过仿真实验对比分析了二者的实施效果。仿真实验表明:从DBR的缓冲控制原理和目标角度,二者具有高度的目标一致性,即两种缓冲控制机制均可使瓶颈工序资源利用率RU和系统单位时间产出量SP提高,瓶颈工序前平均在制品库存BW和总流程在制品库存TW减少;在缓冲效果、系统管理目标实现以及生产计划的可控性三个方面,后者性能均优于前者。

This paper proceeds with the existed limitations analyzing as while DBR was used to solve the uncertainties in remanufacturing system and takes the end-of-life engine remanufacturing system as an example.On the basis of qualitative analysis in the aspects as definition,calculation model and applicable conditions between inventory-buffer and time-buffer control mechanism,their implementation effects were compared and analyzed by simulation experiments.Simulating experiments show that two kinds of buffer control mechanism are of high goal consistency,i.e.,they both enable Resource Utilization of bottleneck(RU) and System Productivity(SP) increased,average Work In Process(WIP) in front of bottleneck(BW) and WIP in total process(TW) decreased.From the perspective of DBR principles and its goals,the latter has better performance than the former in the following three aspects as buffer effect,objective realization for management of system and controllability of production planning.