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Controllers Design for the multi-Shuttle and multi-station Transportation System

Open Journal of Applied Sciences 2021年第8期11卷 946-965页

作者： Tien Dong Ha Minh Tien Trinh Tran Thanh Cong Vu Tuong Quan Vo Faculty of Mechanical Engineering Ho Chi Minh City University of Technology VNU-HCM Viet Nam

Nowadays, the multi-Shuttle and multi-station Transportation System (MMTS) is one of the most interesting research topics in many fields of industries. It is an effective solution to reduce unexpected accidents that occur during transportation as well as increase productivity in manufacturing. The aim of this paper is to introduce the controller design for the MMTS which is built in our BK-Recme BioMech Lab at Ho Chi Minh City University of Technology (VNU-HCM), Viet Nam. Based on the design of this system, the control algorithms will be conducted to check the operation of the whole system. To evaluate the feasibility and effectiveness of this model, we design a series of random instances for different quantities of nodes as well as the different quantities of shuttles. Our system includes 4 stations and 6 shuttles which are assembled in the serial chain system. However, the number of stations and number of shuttles can be expanded to any desired ones which are based on the requirement of the industries. In this paper, we mainly focus on the controller design of this system to make it operate in an effective way that the goods will be transported and delivered to the target station as fast as possible. In order to solve the large-scale instances and realistic transport problems, we propose three algorithms for three progresses as shuttles calling, path reading and shuttles communicating. The shuttles calling is to decide which shuttle should be called to the start-node. Path reading to determine the shortest way to go from start-node to end-node. Finally, shuttles co

关键词： multi-station multi-Shuttle Transportation Shuttle Calling RFID Communicating Start-Node End-Node

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Study on quality evaluation model in multi-station assembly processes

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Engineering Sciences 2008年第4期6卷 25-30页

作者： Wen Zejun Liu Deshun Yang Shuyi Hunan Provincial Key Lab of Health Maintenance for Mechanical Equipment Hunan University of Science and Technology Xiangtan Hunan 411201 China School of Mechanical and Electrical Engineering Central South University Changsha 410083 China

Based on features of dimension variation propagation in multi-station assembly processes,a new quality evaluation model of assembly processes is established. Firstly,the error source of multi-station assembly system is analyzed,the relationship of dimension variation propagation in multi-station assembly processes is studied and the state equation for variation propagation is constructed too. Then,the feature parameters which influence variation propagation and accumulation in multi-station assembly processes are found to evaluate quality characteristic of the assembly system. Through the derivation of equation on dimension variation propagation,station coefficient matrices which are combined and conversed to determine the max eigenvalue are educed. The max eigenvalue is multiplied by the weight coefficient to establish the quality evaluation model in multi-station assembly processes. Furthermore,assembly variation indexes are proposed to judge of the assembly technology process. Finally,through the practical example,the application of the model and assembly variation indexes are presented.

关键词： multi-station quality evaluation model variation propagation assembly variation indexes

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多站点物流行业业务系统设计与开发

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物流管理 2012年第5期

作者：李长有张吉平许巍巍

现代物流的根本宗旨是提高物流效率、降低物流成本、满足客户需求，并越来越呈现出信息化、网络化、智能化、柔性化、标准化和社会化的特征。基于B/S的多站点物流行业业务系统从专线物流企业实际业务流程出发，实现了从托运单管理、发... 详细信息

现代物流的根本宗旨是提高物流效率、降低物流成本、满足客户需求，并越来越呈现出信息化、网络化、智能化、柔性化、标准化和社会化的特征。基于B/S的多站点物流行业业务系统从专线物流企业实际业务流程出发，实现了从托运单管理、发货单管理、运输协议管理、派送单管理、委托单管理等在线操作，过程中实现了套打托运单、运输协议、行车命令单等流程，同时包括车辆管理、仓储管理、财务管理、查询统计分析等功能，使传统业务与在线办理业务有机结合起来，提高了专业化水平，而且实现了客户端零维护。

关键词：多站点专线物流业务系统零维护 multi-station special line business system

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