Manufacturing systems have been evolving to accommodate the production of various types and volumes of products, as with the flexible manufacturing system (FMS). However, with FMS, it is difficult to change the layout of a factory and to cope with any problems that may arise. Therefore, the importance of automated guided vehicles (AGVs) is increasing because AGVs can flexibly adapt to changes of equipment in a factory. However, there has not yet been much research on systems that can respond to a large number of indefinite elements. One response to this issue might be a mimetic solution, which is the application of knowledge from one field to another. We feel that knowledge of traffic engineering, dealing as it does with the transport of passengers, could be applied to the conveyance mechanisms of AGVs. This paper describes an autonomous conveyance system for AGVs based on taxi transportation strategy. The system focuses on knowledge of a flexible taxi system in traffic engineering. We chose taxis because they operate with higher flexibility in terms of traveling routes and arrival/departure points compared with railways and buses. In this study, the waiting mode of taxis was applied as AGV rules and then tested to determine the effect of the proposed system. We came up with an equation to identify the best way of determining the waiting position. Moreover, AGV collisions are of extreme importance when AGVs run for real: if a collision occurs, we have to change the factory schedule and fix the AGV. However, in the past we have never taken account of an AGV collision, and so here we do. Two assessment functions are treated: matching time, which is the period of time elapsing between when a load is received and when a load is generated, and conveyance efficiency, which is the total distance the AGV travels divided by the total distance the AGV carries the load. Results showed that the proposed system (applying the waiting strategy of taxis as AGV rules) is effective at reducing the matching time and intersection of AGVs without any decrease in conveyance efficiency.


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    Titel :

    High Efficiency AGV Transportation System Based on Knowledge of Taxis: Strategy for AGV Behavior at Intersections


    Beteiligte:
    Ito, Taichi (Autor:in) / Aoyama, Eiichi (Autor:in) / Hirogaki, Toshiki (Autor:in) / Ogawa, Keiji (Autor:in) / Mitsuoka, Daisuke (Autor:in)


    Erscheinungsdatum :

    2014


    Format / Umfang :

    6 Seiten




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch