上海交通大学学报(自然版) ›› 2015, Vol. 49 ›› Issue (05): 708-713.

• 机械仪表工程 • 上一篇    下一篇

基于时间Petri网和启发式搜索的柔性制造系统调度算法

李诚,李爽,冯毅萍,荣冈   

  1. (浙江大学 智能系统与控制研究所, 杭州 310027)
  • 收稿日期:2014-06-16
  • 基金资助:

    国家高技术研究发展计划(863)项目(2014AA041805)资助

Scheduling Flexible Manufacturing System Based on Timed Petri Net and Heuristic Search

LI Cheng,LI Shuang,FENG Yiping,RONG Gang   

  1. (Institute of CyberSystems and Control, Zhejiang University, Hangzhou 310027, China)
  • Received:2014-06-16

摘要:

摘要:  利用库所延迟Petri网对柔性制造系统进行建模,在Petri网激发变迁生成的可达树中进行启发式搜索,求解最小完成时间调度策略,并改进了现有计算机器剩余时间的启发式函数,对剩余加工操作进行准确分类,以保证算法的最优性.为了提高算法的求解效率,改进后的启发式函数考虑了未产成操作的剩余时间,以使预测值更加准确并减少了计算量.同时,利用实验验证了所提出方法的正确性和有效性.
关键词:  中图分类号:  文献标志码:  A

关键词: 柔性制造系统, 调度, Petri网, 启发式搜索

Abstract:

Abstract: The place-timed Petri net was used to model the flexible manufacturing system scheduling problems. Combined with the execution capacity and heuristic search, Petri net can achieve the minimum makespan strategy by expanding the partial reachability tree. The heuristic function for calculating the machine remaining operation time was improved. First, remaining operations for general FMS were classified into two categories to guarantee the optimality. Besides, the remaining time of onprocessing operations was also considered, which improved the lower bound for heuristic function. As a result, the optimal scheduling strategy could be achieved in less effort. Experiment results demonstrate the proposed heuristic function performs better as expected.

Key words: flexible manufacturing system (FMS), scheduling, Petri net, heuristic search

中图分类号: