关键词: 装配, 自顶向下协同设计, 依赖关联约束, 时间窗约束

Abstract: According to the high parallel and the dependent relationships among the tasks of the top-down collaborative assembly design process, a task time window algorithm was presented. Based on the outside and inside dependent relationships of the tasks, two methods were adopted to determine the task time window constraints：one was the paralleled sequential design activities; the other was the sequenced coupling design activities, thereby resolved the conflict in time window constraints solving process and decreased the design process waiting time. Finally, a design process stochastic planning algorithm based on design structure matrix was put forward, and the task time window was determined.

Key words: assembly, top-down collaborative design, dependent relationship constraint, time window constraint, stochastic planning