We investigate the problem of decentralized fault prognosis in the context of discrete-event systems. In this problem, the system is monitored by a set of local agents; each of them sends its local information to a coordinator in order to issue a fault alarm before the occurrence of fault. Two new decentralized protocols are proposed by exploiting the state-estimate of each local agent. For each protocol, a necessary and sufficient condition for its correctness is proposed; they are termed as positive state-estimate-prognosability and negative state-estimate prognosability. Verification algorithms for the necessary and sufficient conditions are also provided. We show that the proposed new protocols are incomparable with any of the existing protocols in the literature. Therefore, they provide new opportunities for correctly predicting the fault when all existing protocols fail.

中文翻译：

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使用基于状态估计的协议的离散事件系统的分散式故障预测

我们研究了离散事件系统中分散式故障预后的问题。在此问题中，系统由一组本地代理程序监视；它们中的每一个都将其本地信息发送给协调器，以便在故障发生之前发出故障警报。通过利用每个本地代理的状态估计，提出了两个新的分散协议。对于每种协议，都提出了其正确性的必要和充分条件；他们被称为积极状态估计可预测性和否定状态估计可预测性。还提供了必要条件和充分条件的验证算法。我们表明，提出的新协议与文献中的任何现有协议都无法比拟。所以，