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Optimal Central Control of OHT(Overhead Hoist Transport) in Semiconductor Processing

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주제분류기계공학

초록

Abstract

There is an Overhead Hoist Transport(OHT) for delivering the wafer in semiconductor processing. The transfer system is consists of carrier, vehicle, rail, and support. OHTCMS(OHT Control and Management System) has to take the feature, such as the optimal control and integration with several OHT. In this paper, ESRA(Efficiency of Shortest - Route Algorithms) is proposed which can be transported optimal route and be prevented collision using the Floyd-Warshall algorithms. The proposed algorithm is verified through consecutive simulation for a long time.

참고문헌 (4)

  1. "Start of Automous Mobile Robots Operation in Clean Room" (1989)
  2. "Navigation with Constrains for an Autonomous Mobile Robot", pp.1899~1905 (1994)
  3. "The Fastest Path through a Network with Random Time-dependent Travel Times", 20, pp.~3 (1986)
  4. "A Time-dependent Shortest Path Algorithm for Real-time Intelligent Vehicle", Highway Systems Applications, 1993., ~[DOI]

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