Deadlock Resolution in Automated Manufacturing Systems With Robots
Deadlock Resolution in Automated Manufacturing Systems With Robots
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DOI：
10.1109/tase.2006.888049
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发表时间：
2007-07
影响因子：
5.6
通讯作者：
N. Wu;Mengchu Zhou
中科院分区：
文献类型：
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作者：
N. Wu;Mengchu Zhou
自动化制造系统（AMS）包含许多通用机器（或工作站），缓冲器和自动化材料处理系统（MHS）。MHS可以是自动导引车（AGV）系统和/或由多个机器人组成的系统。死锁解决是AMS中的一个重要问题。针对以AGV系统为MHS的AMS，研究了零件加工过程和AGV系统作为一个集成系统的死锁解决问题。结果表明，AGV可以同时作为物料搬运设备和中央缓冲区，以帮助解决死锁。对于以机器人作为MHS的AMS，现有的工作将机器人视为物料搬运设备，并表明机器人对死锁有贡献。在本文中，这样的AMS建模资源导向Petri网。与现有的工作相反，它表明，机器人没有贡献的死锁采用这样的网络来控制AMS。更有趣的是，它们可以通过充当临时部分存储设备来解决死锁。提出了一种新的死锁控制策略，将机器人同时作为物料搬运设备和缓冲器。新政策比现行政策更有效。
An automated manufacturing system (AMS) contains a number of versatile machines (or workstations), buffers, and an automated material handling system (MHS). The MHS can be an automated guide vehicle (AGV) system, and/or a system that consists of multiple robots. Deadlock resolution in AMS is an important issue. For the AMS with an AGV system as MHS, the problems of deadlock resolution for part processing process and AGV system as an integrated system has been studied. It is shown that AGVs can serve as both material handling devices and central buffers at the same time to help resolve deadlocks. For AMS with robots as MHS, the existing work treated the robots just as material handling devices and showed that the robots had contribution to deadlock. In this paper, such AMS is modeled by resource-oriented Petri nets. Contrary to the existing work, it is shown that the robots have no contribution to deadlock by adopting such nets to control AMS. More interestingly, they can be used to resolve deadlock by serving as temporary part storage devices. A new deadlock control policy is proposed by treating robots as both material handling devices and buffers. The new policy outperforms the existing ones.