Analytical models for an automated storage and retrieval system with multiple in-the-aisle pick positions
Analytical models for an automated storage and retrieval system with multiple in-the-aisle pick positions
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DOI：
10.1080/0740817x.2014.882037
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发表时间：
2014-01
期刊：
影响因子：
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通讯作者：
F. Ramtin;Jennifer A. Pazour
中科院分区：
文献类型：
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作者：
F. Ramtin;Jennifer A. Pazour
具有多个通道内拣选位置的自动化存储和检索系统（MIAPP-AS/RS）是一种案例级订单履行技术，其通过位于通道中的多个拣选位置（输出）实现订单拣选。本文针对不同的运营策略和不同的物理配置，建立了期望旅行时间模型。这些模型可用于分析MIAPP-AS/RS在高峰和非高峰时段的吞吐量性能。此外，封闭形式的近似推导出的情况下，一个无限数量的挑选位置，这使得最佳的形状配置，最大限度地减少预期的旅行时间来推导。将期望行程时间模型与离散货架的仿真模型进行了比较，结果验证了所提出的模型提供了良好的估计。最后，数值实验来说明操作策略和设计配置的性能之间的权衡。结果发现，MIAPP-AS/RS与双拣货层和输入点是一个强大的配置，由于单命令操作策略具有可比的吞吐量性能的双命令操作策略。
An automated storage and retrieval system with multiple in-the-aisle pick positions (MIAPP-AS/RS) is a case-level order fulfillment technology that enables order picking via multiple pick positions (outputs) located in the aisle. This article develops expected travel time models for different operating policies and different physical configurations. These models can be used to analyze MIAPP-AS/RS throughput performance during peak and non-peak hours. Moreover, closed-form approximations are derived for the case of an infinite number of pick positions, which enable the optimal shape configuration that minimizes expected travel times to be derived. The expected travel time models are compared with a simulation model of a discrete rack, and the results validate that the proposed models provide good estimates. Finally, a numerical experiment is conducted to illustrate the trade-offs between performance of operating policies and design configurations. It is found that MIAPP-AS/RS with a dual picking floor and input point is a robust configuration due to the single command operating policy having a comparable throughput performance to a dual-command operating policy.