基于熵特征的高速列车故障诊断方法  

Characteristic Analysis of High-Speed Train Vibration Based on Entropy Feature

作　　者：朱明[1,2] 吴思东[2] 付克昌[1] 

机构地区：[1]成都信息工程学院控制工程学院,成都610225 [2]西南交通大学电气工程学院,成都610031

出　　处：《振动．测试与诊断》2015年第2期381-387,405,共7页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金重点资助项目(61134002);四川省科技厅科技支撑计划资助项目(2014GZ0009);四川省科技厅应用基础研究资助项目(2015JY0257);中国博士后基金资助项目(2012M511939);航空科学基金资助项目(201210P8003);四川省教育厅自然科学重点资助项目(14ZA0171)

摘　　要：高速列车运行状态正常与否对列车系统的安全性和舒适度有重要影响,为分析高速列车运行状态,根据高速列车振动加速度信号的特点,提出了分割能量熵和奇异熵的故障诊断方法。首先,分析列车振动信号随速度变化的特点,对不同速度下的信号进行不同频率范围的分析;其次,对分析范围内信号分割成N个区间,计算分割能量熵和奇异熵,将分割能量熵特征和奇异熵组成特征向量;最后,利用支持向量机进行故障分类识别。实验数据仿真分析结果表明,车体中、后部横向加速度信号特征对四种典型工况在不同速度下分类识别率均较高,达到95%以上,说明该方法能有效识别出高速列车故障状态。The reliability of the train system is impacted by the running state of high-speed trains.To analyze the running state,and aimed at the vibration acceleration signal of high-speed trains,a characteristic analysis method of segmentation-energy entropy and singular entropy is proposed.Firstly,the characteristics of the vibration acceleration signal changed with velocity are analyzed.Then,the signal is divided into Nrange.Segmentation-energy entropy and singular entropy are extracted to make feature vectors.Finally,the support vector machine method is used to classify and identify faults.Experimental results show that four kinds of typical working conditions can be accurately identified in lateral acceleration features of the car body in different speeds,that the identification ratio is above 95%,and that the fault state of highspeed trains can be identified effectively.

关 键 词：高速列车 振动加速度信号 分割能量熵 奇异熵 支持向量机 

分 类 号：U283.2[交通运输工程—交通信息工程及控制]