堆垛机模糊反馈校正控制系统的设计

立体仓库整体性能在很大程度上取决于堆垛机的技术性能,本文着重对堆垛机的控制系统进行研究,旨在进一步掌握自动化立体仓库堆垛机最新的控制技术,设计与开发智能化程度较高的自动化堆垛机控制系统,深入研究和优化自动化立体仓库堆垛机控制问题,以提高立体仓库运行的经济性和装备设施的合理利用.在现代物流技术走向集成化、虚拟化、柔性化、标准化和绿色低碳的背景下,它的作用将会更加明显.     

巷道式堆垛机控制系统的设计

针对柔性制造系统,论述了自动化立体仓库中巷道式堆垛机控制系统的原理、结构和特点,并对巷道式堆垛机的设计要点进行了分析和讨论。所提出的系统成功应用于现代制作系统实验中心的柔性制造系统中,实现了自动化立体仓库中的优化控制、优化运行和优化管理,取得了明显的应用成效。     

单立柱堆垛机的机械结构及控制系统设计

论述了自动化立体仓库中一种单立柱堆垛机的机械结构和控制系统的设计,其中重点介绍了堆垛机的货叉结构、控制系统的结构和位置精度控制方法。本文设计的堆垛机已经安装调试完毕,整体运行效果良好,满足了学校对堆垛机的性能要求,并且能为各高校和中小型企业建设自动化仓库提供技术参考。     

邮包自动化立体仓库堆垛机控制系统的设计

针对目前邮包自动化立体仓库中堆垛机控制系统存在的问题,将PLC技术和变频控制技术相结合,基于变频器S型运行速度曲线的改造,并利用旋转编码器与光电开关进行堆垛机定位系统的设计,为邮包立体仓库堆垛机自动控制系统的设计提供了一种新的思路和方法。     

自动化立体仓库堆垛机速度优化控制研究

随着物流行业的发展,企业对自动化立体仓库储运效率提出了更高的要求,而自动化立体仓库的工作效益主要取决于堆垛机的工作效率和稳定性。目前堆垛机的运行速度不理想导致自动化立体仓库的工作效率低下,因此采用合适的速度控制方案使堆垛机更加高效、平稳的运行具有重要的意义。本文采用S型曲线速度控制方案,并通过实验分析论证S型曲线速度控制方案的优越性。     

自动化立体仓库的关键技术

自动化立体仓库由仓库建筑体、货架、托盘系统、堆垛机、托盘输送机系统、控制系统、计算机管理和调度系统组成,其中堆垛机、控制系统、计算机管理和调度系统最关键,它们反映了自动化立体仓库的先进程度,是发挥自动化立体仓库信息集成优势的基础。本文详细介绍自动化立体仓库的这几个组成部分及其所应用的技术。1堆垛机技术堆垛机是自动化立体仓库中的主要作业机械,其用途是将位于巷道口的货物存入货架,或者取出货架内的货物运送到巷道口。它是自动化立体仓库中最关键的设备。从机械结构方面,堆垛机可分为单柱结构和双柱结构。欧、美特别是…     

模糊PID控制在立体仓库堆垛机速度控制中的应用

从提高堆垛机作业系统的工作效率和可靠性的角度出发,在现有的变频调速的基础上将模糊PID控制技术应用到自动化立体仓库巷道堆垛机的速度控制中,建立了堆垛机模糊PID变频调速控制系统,避免了速度扰动的影响,实现了堆垛机的快速精确定位控制,提高了系统运行的稳定性和可靠性。     

基于模糊PID的堆垛机控制系统研究

自动化立体仓库中堆垛机的运行速率和定位精度是影响其出入库效率的关键因素。针对当前立体仓库堆垛机定位精度低、稳定性差的问题,设计了堆垛机的闭环控制系统结构。通过堆垛机立柱挠度与加速度变化关系的分析,验证了堆垛机速度控制的重要性,同时利用速度自适应参数模型优化堆垛机调速曲线。为了进一步改善堆垛机控制性能,设计了模糊PID控制器。采用模糊PID控制方法优化堆垛机控制参数,以西门子S7-300 PLC为研究平台,对堆垛机的速度控制进行动态研究及系统仿真建模。仿真结果表明,模糊PID控制将传统PID控制和模糊控制相结合,在一定程度上优化了堆垛机控制系统的性能,实现了堆垛机的精确定位。     

巷道堆垛机控制系统的设计

阐述了自动化立体仓库的堆垛机控制技术,介绍了一种巷道堆垛机控制系统的设计,通过认址片和编码器的结合运用,实现了堆垛机低成本高精度的控制。     

仓储控制系统堆垛机设计方案规划

自动化立体仓库具有储存货物量大、货物定位准确、货物搬运方便、整体方案设计方便的优点。要想实现自动化立体仓库的自动化和智能化,最根本的基础便是堆垛机。文中着重介绍了巷道式堆垛机控制系统,并且提出了具体动作设计思路。     

重力式立体仓库管理系统核心模块设计

应用已有的自动化立体仓库技术,同时结合数据库技术、无线网络技术、条形码识别技术、计算机控制技术等相关技术,针对重力式自动化立体仓库“先进先出”（FIFO）的特点,提出了重力式立体仓库管理系统的总体框架并设计了系统的核心模块。应用表明该系统为重力式立体仓库的自动化管理提供了一种解决方案,能有效提高仓库运行效率达40％以上。     

自动化立体仓库中输送机控制系统研究

本文以某空港配餐公司自动化立体仓库为例,介绍了输送机在仓库中的应用。在立体仓库出入库工艺流程的基础上,分析设计了全自动模式下输送机出入库的步进流程图,并对不同工作模式下输送机的工艺流程进行了分析。     

基于PLC的自动化立体仓库控制系统

结合机电一体化技术,完成自动化立体仓库中机械手、堆垛机PLC控制系统设计,实现货物的运输与分配、堆垛机定位控制、出入库控制等功能。该系统具有操作简便,自动化程度高,运行速度快、可靠性高等特点。     

基于FMS的自动化立体仓库监控系统开发与应用术

为了实现对基于柔性制造系统（FMS）的自动化立体仓库（AS／RS）的监控与管理,以浙江机电职业技术学院示范院校建设FMS项目为背景,根据具体实验教学的要求,进行了自动化立体仓库集成监控系统设计,实现了一套功能完备、规范化、工程化的集成监控软件。研究结果表明,该系统的运行效果令人满意。     

Dynamic availability-oriented control of the automated storage/retrieval system. A computer integrated manufacturing perspective

Dynamic scheduling of the storage/retrieval (S/R) requests and increasing the utilization of the storage spaces, are the two common approaches to improve the efficiency of the automated storage/retrieval systems (AS/RS) in industry practice. However, the actual improvement of the AS/RS has to be justified from the perspective of computer integrated manufacturing system (CIMS) because the ultimate objective of the AS/RS is to assist the CIMS in enhancing its material handling efficiency as well as synchronizing the production. Targeting on this crucial requirement, a dynamic availability-oriented controller (DAOC) is developed in this paper to minimize the mean request fulfilment time of the AS/RS. Firstly, while considering the three types of critical dynamic constraints from the CIMS’ shop floor: the availabilities for both machines and the AS/RS, the process plan of the product, and the production schedule, DAOC is capable of determining the optimal execution sequence of the S/R requests issued from the CIMS and activating dynamic storage space consolidation commands of the AS/RS. Secondly, simulation experiments are conducted and the results show that DAOC successfully improves the S/R request control scheme of the traditional class-based assignment method and significantly outperforms four comparable approaches under various CIMS configurations.     

Storage assignment optimization in a multi-tier shuttle warehousing system

The current mathematical models for the storage assignment problem are generally established based on the traveling salesman problem(TSP), which has been widely applied in the conventional automated storage and retrieval system(AS/RS). However, the previous mathematical models in conventional AS/RS do not match multi-tier shuttle warehousing systems(MSWS) because the characteristics of parallel retrieval in multiple tiers and progressive vertical movement destroy the foundation of TSP. In this study, a two-stage open queuing network model in which shuttles and a lift are regarded as servers at different stages is proposed to analyze system performance in the terms of shuttle waiting period (SWP) and lift idle period (LIP) during transaction cycle time. A mean arrival time difference matrix for pairwise stock keeping units(SKUs) is presented to determine the mean waiting time and queue length to optimize the storage assignment problem on the basis of SKU correlation. The decomposition method is applied to analyze the interactions among outbound task time, SWP, and LIP. The ant colony clustering algorithm is designed to determine storage partitions using clustering items. In addition, goods are assigned for storage according to the rearranging permutation and the combination of storage partitions in a 2D plane. This combination is derived based on the analysis results of the queuing network model and on three basic principles. The storage assignment method and its entire optimization algorithm method as applied in a MSWS are verified through a practical engineering project conducted in the tobacco industry. The applying results show that the total SWP and LIP can be reduced effectively to improve the utilization rates of all devices and to increase the throughput of the distribution center.     

An innovative automated storage and retrieval system for B2C e-commerce logistics

Flexible and timely warehousing activities provide a strong foundation for logistic systems. However, increasing B2C e-commerce with a variety of small internet orders may have a tremendous impact on warehousing. Automated storage/retrieval systems (AS/RSs) are a valid alternative for warehousing. Typical AS/RSs design and control problems in a static environment and cannot effectively manage parcel, small, and irregular items. This study proposes a new AS/RS that is more efficient and flexible for handling B2C e-commerce logistics. An auto-access multilevel conveying device (IMCD) with three-dimensional movement is integrated into the AS/RS. The ant colony system algorithm locates near-optimal routes for the IMCD. Typical travel distance/time measures evaluate the performance of an S/R device running on a warehouse floor. However, the performance index in this study looks at the IMCD’s travel time with three-dimensional movement in completing a batch order. To validate the new AS/RS, two simulation experiments were conducted to examine the effects of three-dimensional velocity and rack shape. Finally, this study compares a typical S/R system with the new AS/RS and makes recommendations for practical applications and further research.     

Evaluation and dynamic allocation of AS/RS control rules: A simulation study

The goal of this research is to investigate the performance of an automated storage and retrieval system (AS/RS) which is operated using different control rules. Two phases of study are conducted. Phase 1 evaluates the efficiency of different rules for stacker control, storage-location assignment and job sequencing. Phase 2 studies the impact of these rules on the performance of the AS/RS using a multipass simulation approach. In this paper, the methodology of investigation is discussed, the results are presented and analysed, and suggestions for future study are made.     

基于MCGS组态软件的自动化立体仓库控制系统的开发

通过设计一套自动化立体仓库,达到解决城市用地紧张,降低劳动强度,提高工作效率等的目的。它的控制系统是以西门子PLC作为控制系统的核心,利用MCGS组态软件设计出自动化立体仓库上位机监控界面,MCGS组态软件通过设备驱动程序从现场硬件设备获取实时数据并处理,通过指示灯显示货物是否完成到位,并由操作人员按照要求将控制指令数据送给现场硬件设备,以控制立体仓库码垛机械手的各种动作,实现对货物的自动化存取。     

面向仓储物流的建模及控制系统设计方法

为提高现代企业仓储物流的设计质量和效率,提出了一种基于资源颜色时序信号的扩展Petri网建模及控制系统设计方法.该方法首先采用资源颜色时序信号的扩展Petri网建立了仓储系统的动态模型,清晰地描述了各种物流活动的顺序、并发,冲突等关系,并结合关联矩阵,阐述了判断死锁和陷阱的方法.该方法建立的模型可根据Petri网运算规则进行保性化简,便于仿真分析和验证,且可直接用于系统可编程逻辑控制器的控制程序设计.最后,以仓储物流控制系统为例,阐述了系统建模及控制设计过程.