Abstract
For the structural complexity of the manufacturing system, it is difficult to decompose and express the equipment reliability; a three-dimensional method based on Petri nets was proposed to model and calculate equipment reliability of manufacturing systems. This method includes three steps: The first step is to model the equipment chain network according to manufacturing process by Petri nets, and the reduction method of series and parallel Petri nets is used to simplify the complexity of Petri nets; The second step is to model each single equipment reliability by tree Petri nets, fault tree analysis (FTA) is adopted to express single equipment reliability, and then FTA is converted to tree Petri nets according to the conversion rule between them; The third step is to integrate chain and tree Petri nets into three-dimensional Petri nets to express the whole equipment reliability of manufacturing system. Finally, the reliability calculation of engine cylinder manufacturing system is taken as an example to verify the proposed method.
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