基于树搜索的一种动态空间调度方法

Dynamic spatial scheduling approach based on tree-search

针对大型离散企业产品组装空间调度问题,提出了一种基于树搜索的动态调度方法。该方法同时考虑了空间布置和时间调度两方面因素,在整个调度规划周期内,算法分成两部分:一是调度准备阶段,把调度时间分割成连续的时间段,并通过时间约束条件得到在每个分场地内需要组装的模块候选集,同时得到分场地的初始布局状态;二是局部调度阶段,通过深度优先树搜索的方法,在每个时间片内使用局部调度算法进行空间布置搜索,得出最优调度。该方法简单实用,最后,仿真实验说明了所提方法的有效性。

This paper proposes a dynamic spatial scheduling approach based on tree-search to solve the assembling spatial scheduling problem in the large-sized discrete companies.The approach considers the spatial layout and the time scheduling simultaneously,and in the whole scheduling plan period,the algorithm is divided into two parts：the first is the pre-scheduling stage,the scheduling time is separated into the continual time-slices,and the block candidate set is got via the time constraint, the initial layout status is given at the same time;the second is the partial scheduling stage,with the depth first search,we perform the spatial layout search by the partial schedule algorithm in every time-slice,in order to get the optimal scheduling plan. This approach is simple and useful.Finally,the simulated experiment illustrates the validity of this approach.