Abstract
As for the problem of low efficiency and difficulty of the operation of block, a method of modeling and simulation of the operation scheduling process of block stockyard based on Petri net is proposed. Firstly, based on the analysis of the operation scheduling process of block yard, the operation scheduling mode of virtual flow line is presented; Secondly, a virtual flow line model according to the operation scheduling model of block stockyard based on hierarchical-timed Petri net is established and the feasibility of the virtual flow line is proved with the method of invariant; Finally, a block stockyard operation scheduling simulation model based on the digital factory strategy is established and the digital simulation analysis of block yard operation scheduling is carried out. The results show that the mode of virtual flow line operation and the Petri net contribute to improving efficiency of the block stockyard operation scheduling and resources using, the virtual flow line can also avoid the blocking. The effective method and theoretical support are provided in this paper for the block stockyard scheduling.
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