Robust deadlock supervisory control techniques for automated manufacturing systems under resource failures that need additional central buffers may lead to supererogatory cost in control implementation. To mitigate this issue, this paper reports a Petri net-based low-cost adaptive supervisory control policy that does not require extra buffers. If an unreliable resource fails, three classes of buffer spaces can be temporarily used to store parts that require the failed resource in their impending processing routes. The proposed adaptive supervisory control comprises of control places and switch controllers. If an unreliable resource fails, the switch controllers are activated to move the part types that require the failed resource in their subsequent processing stages into borrowed buffer spaces. After the failed resource is recovered, the system returns to its normal operating mode. The part types in the borrowed buffer spaces will be returned to their last processing stages before the occurrence of the failure and continued along their processing route. We propose criteria for selecting buffer space borrowers and buffer space lenders. Furthermore, redundant control places are removed by a new technique proposed in the paper in order to reduce the complexity of the supervisory control structure. We demonstrate the proposed method using examples.

中文翻译：

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使用借用缓冲槽的自动化制造系统的自适应监控

在资源故障情况下，用于自动化制造系统的鲁棒死锁监控技术需要额外的中央缓冲区，这可能会导致控制实施中的额外成本。为了缓解这个问题，本文提出了一种基于 Petri 网的低成本自适应监督控制策略，该策略不需要额外的缓冲区。如果不可靠的资源发生故障，可以临时使用三类缓冲空间来存储在其即将进行的处理路线中需要故障资源的部件。所提出的自适应监控由控制位置和开关控制器组成。如果不可靠的资源发生故障，则激活切换控制器以将在其后续处理阶段中需要故障资源的部件类型移动到借用的缓冲空间中。故障资源恢复后，系统恢复正常运行模式。借用的缓冲空间中的零件类型将返回到故障发生之前的最后加工阶段，并继续沿其加工路线进行。我们提出了选择缓冲空间借款人和缓冲空间贷方的标准。此外，本文提出的新技术消除了冗余控制位置，以降低监控结构的复杂性。我们使用示例演示了所提出的方法。