基于仿真的汽车发动机再制造生产线缓冲区容量优化

Optimization of Buffer Capacity for the Remanufacturing Production Line of Automobile Engine Based on Simulation

以汽车发动机核心部件为对象,以在制品数量(WIP)为主要评价指标,重点研究回收件到达率、可再制造率、加工时间等不确定因素对缓冲区容量的影响.基于离散事件仿真技术建立系统动态运行模型,采用正交试验设计方法完成了仿真试验的方案设计.通过仿真再制造生产线动态平衡及缓冲区容量的内在变化规律,获得生产线优化运行所需的最小缓冲区容量.案例研究表明,所提出的方法能有效确定再制造系统缓冲区的最佳容量.

Based on the analysis of automobile engine＇s core parts, selecting WIP as the main evaluation index, the factors which will influence the buffer capacity are studied, including uncertainty of recovery arrival rate, remanufacturing rate, processing time and so on. A dynamic simulation model for the remanufacturing production line is established, and orthogonal test design method is used to obtain the simu-- lation schemes. Through the simulation, the relation between the buffer capacity and dynamic balance of line is studied, and the minimum buffer capacity required for the operation of optimized production line can be obtained. Case studies show that the proposed method can effectively determine the optimal buffer capacity for remanufacturing system.