东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (2): 176-181.DOI: 10.12068/j.issn.1005-3026.2015.02.006

• 信息与控制 • 上一篇    下一篇

OHT搬运系统防阻塞调度策略

刘晓斌, 周炳海   

  1. (同济大学 机械与能源工程学院, 上海201804)
  • 收稿日期:2013-10-10 修回日期:2013-10-10 出版日期:2015-02-15 发布日期:2014-11-07
  • 通讯作者: 刘晓斌
  • 作者简介:刘晓斌(1989- ),男,福建漳浦人,同济大学博士研究生; 周炳海(1965- ),男,浙江浦江人,同济大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(61273035,71471135).

Vehicle Congestion-Avoidance Policy of Overhead Hoist Transport Systems

LIU Xiao-bin, ZHOU Bing-hai   

  1. School of Mechanical Engineering, Tongji University, Shanghai 201804, China.
  • Received:2013-10-10 Revised:2013-10-10 Online:2015-02-15 Published:2014-11-07
  • Contact: ZHOU Bing-hai
  • About author:-
  • Supported by:
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摘要: 为有效解决300mm半导体晶圆制造工厂搬运系统整合式布局运行过程中的阻塞现象,提高搬运系统的运行效率,构建了OHT(高空提升运输)搬运系统防阻塞调度策略.首先,充分考虑OHT搬运系统中各搬运设备之间的相互影响,以搬运完工时间最小为优化目标,建立数学模型.然后,提出无等待轨道设计(NWL)和基于检测点的空车运行策略(CBCP)避免装卸点阻塞.结合第K短路径法和时间约束集概念,构建OHT搬运系统防阻塞策略(VCAP),并将其运用于OHT搬运系统的具体调度,设计OHT搬运系统防阻塞调度方法.最后进行仿真实验及对比分析,结果表明本文提出的防阻塞调度策略是有效可行的.

关键词: OHT(高空提升运输), 搬运系统, 调度, 阻塞

Abstract: To solve the congestion emerging in the process of tool-to-tool transportation in the united layout of 300mm semiconductor wafer fabrications and improve the transport efficiency, a vehicle congestion-avoidance policy was proposed for scheduling overhead hoist transport (OHT) system. Firstly, a mathematical model, which considers the interrelationship of all the OHTs in the system, was built with an optimal objective function of minimizing completion time. Then a no-wait loop designing (NWL) conception and a checkpoint-based circulation policy (CBCP) were represented as a resolution of vehicle congestions. Next, the vehicle congestion-avoidance policy (VCAP) was structured by combining the K-shortest-route algorithm with time constraint sets, which was used to form a scheduling method without vehicle congestions. Finally, simulation experiments were designed and carried out to evaluate the proposed policy. The results indicate that the congestion-avoidance policy is feasible and effective.

Key words: overhead hoist transport (OHT), transport system, scheduling, congestion

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