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Fault detection of damper in railway vehicle suspension based on the cross-correlation analysis of bogie accelerations

机译：铁路车辆悬架阻尼器的故障检测基于转向架加速的互相关分析

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摘要

Nowadays, the condition-based maintenance is associated more and more with railway transport to improve the safety, availability, reliability and capacity of this transport system, and to reduce life cycle costs for the railway vehicles. The condition-based maintenance requires that vehicle components are replaced based on their real condition, which implies the fault detection and isolation during the train's operation. The paper proposes a method to detect the failure of the damper in the primary suspension of the rail vehicle, based on the analysis of cross-correlation of the vertical accelerations measured on the bogie frame against the two axles. The numerical simulations and experimental results show a very good correlation between the bogie accelerations when the dampers are in a normal operation condition. This thing is shown based on the values of the cross-correlation coefficient (CCC) of the bogie accelerations. The failure in a damper can be detected by the decrease of the CCC of the bogie accelerations, a confirmed fact in the results derived from numerical simulations. The proposed method has more advantages, namely, it is a signal-based method and hence does not require a complex mathematical modelling of the vehicle-track system and knowledge of its parameters or of the external conditions; the method makes relative comparisons between measurements and hence reduces the effect of the factors that influence outputs; the method can be also extended for the secondary suspension; the method can be easily implemented on any type of bogie.
机译：如今，基于条件的维护越来越多地与铁路运输有关，以改善该运输系统的安全性，可用性，可靠性和容量，并降低铁路车辆的生命周期成本。基于条件的维护要求基于其实际条件更换车辆组件，这意味着在火车操作期间的故障检测和隔离。本文提出了一种方法来基于分析在对两个轴上的转子架上测量的垂直加速度的互相关的互相关的互相关来检测阻尼器在轨道车辆的主要悬架中。数值模拟和实验结果表明，当阻尼器处于正常运行条件时，转向架加速度之间的相关性非常好。该物品基于转向架加速度的互相关系数（CCC）的值来示出。可以通过转向架加速度的CCC减小来检测阻尼器中的故障，从数值模拟导出的结果中的确认事实。所提出的方法具有更多优点，即，基于信号的方法，因此不需要车辆轨道系统的复杂数学建模和其参数或外部条件的知识;该方法在测量之间进行相对比较，因此降低了影响产出的因素的效果;该方法也可以延长二次悬浮液;该方法可以在任何类型的转向架上轻松实现。

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