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A fault diagnosis approach for railway track circuits trimming capacitors using EMD and Teager Energy Operator

机译：使用EMD和Teager Energy Operator的铁路轨道电路微调电容器的故障诊断方法

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The trimming capacitor is an important component of a track circuit used for train detection in the railway train control system. In order to ensure the required dependability and availability levels, their working conditions shall be monitored in a timely and efficient manner. This paper presents a diagnosis approach of trimming capacitors based on Empirical Mode Decomposition (EMD) and Teager Energy Operator (TEO) theory. The EMD is used to decompose the short-circuit current signal into two parts. One is the sum of a set of Intrinsic Mode Functions (IMFs), which feature the fault information of the defective trimming capacitors; the other is the residual element relating to the signal variation trend. Then the TEO of IMFs is performed and the instantaneous frequencies are derived, so as to highlight the fault features. Experiments with simulated data show that multiple defects can be detected effectively using this approach. Compared with the existing methods which are only able to detect one failed capacitor, the integrated method represents a rather improved performance.
机译：微调电容器是用于铁路列车控制系统中的列车检测的轨道电路的重要组件。为了确保所需的可靠性和可用性水平，应及时有效地监控其工作条件。本文提出了一种基于经验模态分解（EMD）和Teager能量算子（TEO）理论的微调电容器诊断方法。 EMD用于将短路电流信号分解为两部分。一个是一组固有模式功能（IMF）的总和，这些功能具有故障修整电容器的故障信息；另一个是与信号变化趋势有关的残差元素。然后进行IMF的TEO并导出瞬时频率，以突出故障特征。模拟数据的实验表明，使用这种方法可以有效地检测出多个缺陷。与仅能够检测一个失效电容器的现有方法相比，该集成方法代表了相当大的性能。

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