Structural fault diagnosis in Timed Continuous Petri Nets
Structural fault diagnosis in Timed Continuous Petri Nets
复制标题
定时连续 Petri 网中的结构故障诊断
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
A. Ramírez
中科院分区：
文献类型：
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作者：
J. Fraustro;J. Ruiz;C. Vázquez;A. Ramírez
本文研究了在无限服务器语义下，用时间连续Petri网（TCPN）建模的系统中的故障检测与隔离问题。所提出的方法假设正常行为TCPN模型是可用的并且是部分可观察的（即，只有位置的子集的标记是可用的）。潜在的产品拒收故障和减速故障由转换表示，其触发表征相应故障的发生。基于该模型，提出了一种新的可诊断TCPN的结构特征。这种表征是基于结构的可观测性的地方属于有向路径，可测量的地方之间，包含有关故障转换的发射信息。为了隔离故障，诊断器也提出了这项工作。该诊断器基于一组鲁棒降阶有限时间观测器。当发生特定故障时，使用观察器中的内部信号隔离故障。
This work addresses the fault detection and isolation problem in systems modeled by Timed Continuous Petri Nets (TCPN) under the infinite server semantics. The proposed approach assumes that the normal behavior TCPN model is available and partially observed (i.e., only the marking of a subset of places is available). Potential product rejection faults and speed reduction faults are represented by transitions, whose firing characterize the occurrence of the corresponding faults. Based on this model, a novel structural characterization of diagnosable TCPN is presented. This characterization is based on the structural observability of places belonging to directed paths, between measurable places, containing information about the firing of the fault transitions. In order to isolate faults, a diagnoser is also proposed in this work. The diagnoser is based on a set of robust reduced order finite-time observers. The faults are isolated using internal signals in the observers that are different from zero when a specific fault occurs.