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首页> 外文期刊>The International Journal of Advanced Manufacturing Technology >Deadlock control of flexible manufacturing systems via invariant–controlled elementary siphons of petri nets
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Deadlock control of flexible manufacturing systems via invariant–controlled elementary siphons of petri nets

机译：通过不变控制的Petri网基本虹吸管对柔性制造系统进行死锁控制

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摘要

Effective resolution for deadlock problems plays an important role in the operation of automated flexible manufacturing systems (FMS). Based on P-invariants and elementary siphons of Petri nets, a deadlock prevention policy is developed for a special class of Petri nets that can well model many FMS. Siphons in a plant net model are divided into elementary and dependent ones. For each elementary siphon, a monitor is added to the plant model such that the siphon is invariant-controlled. Our method guarantees that no emptiable control-induced siphon is generated due to the addition of the monitors. When all elementary siphons are controlled, the controllability of a dependent siphon is ensured by properly setting the control depth variables of its related elementary siphons. An FMS example is utilized to illustrate the proposed methods.
机译：有效解决死锁问题在自动化柔性制造系统（FMS）的运行中起着重要作用。基于Petri网的P不变性和基本虹吸管，针对能够很好地对许多FMS建模的特殊类Petri网，开发了一种防死锁策略。植物网模型中的虹吸管分为基本的和从属的。对于每个基本虹吸管，将监视器添加到工厂模型，以便对虹吸管进行恒定控制。我们的方法保证了由于添加了监视器而不会产生空的控制引起的虹吸。当所有基本虹吸管都受到控制时，通过适当设置相关虹吸管的控制深度变量，可以确保从属虹吸管的可控性。一个FMS示例被用来说明所提出的方法。

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