Abstract: In this paper, a method of dividing the pressure chambers supported by the pressure detection control logic is proposed to solve the problem that the specific malfunctioning part cannot be determined when the data are inconsistent from a train designed with dual pressure-sensor redundancy. Compared with the existing fault diagnosis methods in redundant design, the proposed method can further determine the specific malfunctioning part after a fault, and can continue to be used on the premise of meeting the requirements for confidence levels. This method can be applied to train tail equipment to further improve equipment availability on the premise of improving the accuracy of fault diagnosis.

Key words: fault detection, pressure sensor, hot-standby redundancy, solenoid valve, train tail system

摘要： 提出一种通过采用分割压力仓并配合压力检测控制逻辑的方法，用于解决采用双压力传感器冗余的设计中，在数据不一致时，无法确定故障个体的问题。通过与既有冗余设计的判定方法对比，该方法能够在故障后进一步确定故障个体，在满足置信度的前提下可继续使用。该方法可应用于列尾设备在提高故障判断的准确度的前提下，进一步提高设备可用性。

关键词: 故障检测, 压力传感器, 热备冗余, 电磁阀, 列尾系统