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A machine-to-loop assignment and layout design methodology for tandem AGV systems with multiple-load vehicles

机译：具有多负载车辆的串联AGV系统的机对环分配和布局设计方法

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In this paper, we propose a design methodology for tandem Automated Guided Vehicle (AGV) systems with multiple-load vehicles. Our goal is to devise a design methodology that can achieve the following objectives in multiple-load tandem AGV designs. The first objective is to achieve the workload-balance between vehicles of different loops. The second objective is to minimize the inter-loop flow. The final objective is to minimize the flow distance. To achieve these objectives, the following problems are studied. First, we conduct simulations to study the relationship between a vehicle's load-carrying capacity and work capacity. This relationship is then considered in the second problem, i.e. the problem of determining the machine content of each loop. A two-stage machine-to-loop assignment method is proposed for solving this problem. At the first stage, an initial machine-to-loop assignment is generated. This initial assignment is then improved at the second stage using Simulated Annealing (SA). The third problem is the problem of determining the layout of machines in each loop. A flow-line design method and SA are adopted for solving this problem. The fourth problem is the layout problem of guide-path loops. To solve this problem, a famous layout method found in the literature is adopted. The last problem includes the problem of determining the best orientation of each loop and the problem of finding the best places to set up transfer stations between adjacent loops. A mathematical programming model that can solve them simultaneously is proposed. Simulations are then conducted to verify the design, and to show that the proposed design methodology is indeed capable of producing good and satisfactory tandem AGV designs with multiple-load AGVs. Finally, it is our hope that the knowledge learned from this study can help us have a better understanding of multiple-load AGV systems and allow us to have successful implementations of similar systems in practice.
机译：在本文中，我们提出了一种用于多负载车辆的串联自动导引车（AGV）系统的设计方法。我们的目标是设计一种在多负载串联AGV设计中可以实现以下目标的设计方法。第一个目标是实现不同回路的车辆之间的工作量平衡。第二个目的是使回路间的流动最小化。最终目的是使流动距离最小。为了实现这些目标，研究了以下问题。首先，我们进行模拟以研究车辆的承载能力与工作能力之间的关系。然后在第二个问题，即确定每个循环的机器内容的问题中考虑该关系。为了解决这个问题，提出了一种两阶段的机器到回路分配方法。在第一阶段，将生成初始的机器到回路分配。然后在第二阶段使用模拟退火（SA）改进此初始分配。第三个问题是确定每个循环中机器布局的问题。为了解决这个问题，采用了流水线设计方法和SA。第四个问题是引导路径循环的布局问题。为了解决这个问题，采用了文献中发现的著名的布局方法。最后一个问题包括确定每个环路的最佳方向的问题以及找到在相邻环路之间建立传输站的最佳位置的问题。提出了可以同时求解它们的数学编程模型。然后进行仿真以验证设计，并证明所提出的设计方法确实能够用多负载AGV产生良好且令人满意的串联AGV设计。最后，我们希望从这项研究中学到的知识能够帮助我们更好地理解多负载AGV系统，并让我们能够在实践中成功实施类似系统。

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