自動化專業(yè)英語論文(附譯文)(華北電力大學(xué))-文庫吧資料
2024-08-22 14:46本頁面
【正文】 al manufacturing process parameters,such as layout reconfigurations, and resource reallocations, can be derived ahead of time from the simulation models.A highlevel process flow of this simulation model is shown below in Figure 541, where sourcel1 generates ining parts according to the system takt time with optional statistical distributions. Buffer S receives ining parts via the only crane resource in the system. The part will then be lifted by the crane to the machine B where multiple processes will be performed by multiple resources. The part then continues to move from the machine B to the machine P, the end of the process line. Multiple processes are assigned throughout this line on each machine. An additional process is needed in the middle of the line where the part will be transferred to the buffer A followed by a couple of external processes. Afterwards, buffer A receives the part and calls for the overhead crane to transfer the part back to buffer T where the part will continue through the rest of the process. At the end of the line, the part goes from the machine P to the buffer A then to the sink, which is the final destination of all parts in the simulation model.Two different partcarrying platforms are involved in the system. The “high speed” dolly transfers parts to and from buffer A. The “l(fā)ow speed” dolly carries one part at a time from machine B all the way to machine P. additional ponents are introduced to the system from source 2 and 3 at different stages of this process line.Resource class types in this model consist of labor, machine , and Automatic Guided Vehicle (AGV) elements. The machine class stands alone for each machine, while the labor and AGV classes are managed by their respective controllers. Those thirty plus processes that are standalone objects can be assigned to multiple machines. Thus, each machine has from two to six assigned processes . Processes run at all times in an endless doloop as part of the nature of logic and its assigned time duration on the machine where it resides. After the last process sequence of the last machine class has been executed, the part is transferred to the sink class where it will be logically destroyed and removed from the modeling system.A Shop Data File containing resource, layout, and process information of an assembly line is used to generate Batch Control Language (BCL) file, according to the process discussed in the next paragraph. This
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