Dissertation > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Automatic control,automatic control system

The Control Method Analysis and Simulation Study of Logistics Transport on Test Line

Author FangLiPing
Tutor RenYongQiang
School Hefei University of Technology
Course Mechanical Manufacturing and Automation
Keywords interflow node distributary node control method simulation analysis optimization
Type Master's thesis
Year 2013
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With the development of economic globalization, commercial competition all over the world is enhancing. In order to enlarge output and decrease cost of human recourses, the degree of automation of manufacturing enterprises is increasing, however the increase depends on a fluent logistics strategy, of which the key is to control interflow nodes and distributary nodes, An illegitimate strategy will result in serious logistics jams, moreover, which can lead a shutdown of an assembly line, So it is significant to study on logistics control strategies from the point of avoiding jams and poising transport ability.It is reviewed that the context of this study and the general situation about logistics at home and abroad, and the problems met by some companies are investigated. The significance of logistics control strategies is explained. Some relevant concepts about automatic product lines are presented on the basis of referring to many papers and books. It is focused on three control strategies of the interflow nodes. The least sending time is concluded when there are many interflow nodes. In order to balance the flow of distributary node in two directions, a method that the node is controlled with traffic lights is put forward under the basis that a distributary node is like a T-crossing with a single passage, and then the relational calculation is completed.Transmission test lines taken as the object of the research, control strategies of interflow and distributary nodes are applied combined with a practical instance. Besides, the logistics simulation model of the line is established. The bottleneck of the test line is analyzed by running the simulation programs, and the strategy to decrease jams of the line is optimized. At last, the jams are reduced when the sending time of theoretical on-line zone holds, which proves the feasibility of the control strategies and the optimization project.

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