多层穿梭车密集库系统作业效率优化研究

发布时间：2018-01-15 14:35

本文关键词：多层穿梭车密集库系统作业效率优化研究　出处：《山东大学》2017年硕士论文　论文类型：学位论文

【摘要】：近年来,我国电子商务经历了巨大的发展浪潮,其背后提供服务的是处在风口浪尖上的物流行业。分拣环节是自动化物流环节中的关键一环,其高效性和精准性制约着整个物流服务的质量。多层穿梭车系统是自动化拣选系统中关键的一部分,它综合地运用信息化中央集控调度系统和机械化任务执行系统,以实现"货到人"方向的物流流通。密集库是按信息系统的编码存储原则,尽最大可能将货物通过三维空间上的紧密压缩,使货架与货物之间形成一个高密度且规律排列的集合,从而极大地提升了仓储空间利用率。多穿系统与密集库的配合使用,正是呈现出小批量、多批次、组合化等特点的电商企业订单拣选效率低下的克星。本课题来源于某W电商平台的多层穿梭车自动化密集立体库项目。在电商海量订单的前提和分拣作业快速响应机制的背景下,本文针对采用"货到人"拣选模式的多层穿梭车密集库,介绍了库存量单位SKU等基本的仓储物流概念和多穿系统密集库的基本组成:仓储运输机械系统和管理监控信息系统两大部分,以及系统的作业流程、作业效率指标等。本文主要研究以下两方面的问题:一方面是库存箱间的库存量合并策略问题,简称库存箱合箱问题。本文汲取实际运营中的经验,制定了库存箱合箱的标准,将部分剩余库存量较小的库存箱作为主要研究对象,在考虑SKU相关性的基础上,引入了 SKU的实际体积,提出了考虑SKU体积的启发式库存箱合箱策略,将相关性强并且符合体积存放原则的SKU进行两两合箱操作,将提高货物存储效率指标和订单拣选效率指标作为衡量合箱效果优良的标准。另一方面是基于合箱策略的巷道内穿梭车效率优化问题。本文分析了多巷道多层混放方式是使得多层穿梭车密集库系统出库效率更高效的存储方式。在多层穿梭车密集库系统中合箱策略背景下,建立了巷道内穿梭车工作量平衡的问题模型,提出了巷道内穿梭车工作量平衡的启发式策略,在一定程度上直接疏解了少数巷道内穿梭车积压出库任务的瓶颈问题,并间接地提升了系统的拣选作业效率指标,得到了有助于实际运营的仓储和调度策略。以上两方面研究均以实际运营过程中的真实分拣订单为基础,通过实例数据加以验证,最终作业效率的优化结果体现在货物存储效率指标和订单拣选效率指标的提高上。
[Abstract]:In recent years, e-commerce in China has experienced a huge wave of development, behind the provision of services is in the forefront of the logistics industry. Sorting is the key link in the automated logistics link. Its high efficiency and precision restrict the quality of logistics service. Multi-layer shuttle system is a key part of automatic picking system. It synthetically uses the information centralized control dispatching system and mechanized task execution system to realize the logistics circulation in the direction of "cargo to person". The dense library is the code storage principle of the information system. To the greatest extent possible, goods are tightly compressed through three-dimensional space to form a highly dense and regularly arranged collection between the shelves and the goods. Thus greatly improve the utilization of storage space. The use of multi-breakdown system and intensive library, is showing a small number of batches, many batches. This topic comes from the project of multi-layer shuttle car automation intensive storehouse of a W ecommerce platform. In the premise of the huge order of e-commerce business and the quick response of sorting operation, this topic comes from the project of multi-layer shuttle vehicle automation dense storehouse with the characteristics of combination and other characteristics of ecommerce enterprises. In the context of the mechanism. This paper aims at the multi-layer shuttle vehicle dense storehouse which adopts the "cargo to person" picking mode. This paper introduces the basic concept of warehouse logistics such as inventory unit SKU and the basic composition of multi-perforated system dense warehouse: storage and transportation machinery system and management monitoring information system, as well as the operation flow of the system. This paper mainly studies the following two problems: on the one hand, the inventory consolidation strategy between inventory boxes, referred to as the inventory box closing problem. The standard of closing box of stock box is established. The inventory box with small surplus stock is taken as the main research object, and the actual volume of SKU is introduced on the basis of considering the correlation of SKU. In this paper, a heuristic inventory box closing strategy considering SKU volume is proposed. The SKU, which has strong correlation and accords with the volume storage principle, is used in pairwise case operation. The index of improving the efficiency of cargo storage and the efficiency of order picking are taken as the standard to measure the good effect of closing box. On the other hand, the optimization problem of the efficiency of shuttle vehicle in roadway based on closing strategy is discussed. This paper analyzes the multi-level mixing of multi-laneway and multi-layer. The release mode is a more efficient storage method to make the multi-layer shuttle vehicle dense depot system more efficient. Under the background of closing box strategy in the multi-layer shuttle vehicle dense storage system. The problem model of the workload balance of the shuttle vehicle in the tunnel is established, and the heuristic strategy of the workload balance of the shuttle car in the tunnel is put forward. To a certain extent, it directly solves the bottleneck problem of the backlog of shuttle vehicles in a small number of roadways, and indirectly improves the efficiency index of the system picking operation. The above two aspects are based on the real sorting orders in the actual operation process, and verified by the actual data. The optimization results of the final operation efficiency are reflected in the improvement of the goods storage efficiency index and the order picking efficiency index.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：F253

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