agv自動(dòng)導(dǎo)航車中英文資料外文翻譯文獻(xiàn)-閱讀頁
2024-12-26 13:05本頁面
【正文】 aths that vehicles can follow when moving from node to node. Directed arcs indicate directions of vehicle flows. Cost can be assigned to each arc representing the distance between the two end points of a segment or the time required by a vehicle to travel along the arc. The workflow model can be translated to a 0–1 integer optimization model. The main objective of a guidepath design problem is minimizing the total vehicle travel 中英文資料 7 distance. Information shortage is an important problem for guidepath design. For example, the flow of materials within a warehouse can be changed over time and it is difficult to estimate. Guidepath systems can be classified roughly by characteristics indicated in Table 1. The flow topology describes the plexity of the guidepath work. In the simplest case, the guidepath system consists of only one single loop. Several loops grouped together form a tandem configuration. A conventional topology is a plicated work with paths, crosses, shortcuts and junctions. A path segment in a work may contain only one lane or few parallel lanes. Vehicles can travel a lane in only one direction (unidirectional) or both directions (bidirectional). Table 1. Selecting an appropriate type of the guidepath system is important. Unfortunately, there is no guideline for it. The guidepath type is normally chosen based on the characteristics of a facility and the designer’s experiences. An expert system can be useful to support the guidepath system selection process. After choosing an appropriate type of guidepath system, the designer can use a suitable (mathematical) model to obtain the best possible guidepath system. In practice, conventional guidepath systems can be seen regularly in warehouses and distribution centers (De Koster et al., 202
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