基于Teager算子的内燃机气门间隙异常故障诊断方法  

The fault diagnosis method of abnormal combustion engine valve clearance based on Teager energy operator

作　　者：张晓帆 吴亚龙 么子云 茆志伟 江志农 Zhang Xiaofan;Wu Yalong;Yao Ziyun;Mao Zhiwei;Jiang Zhinong(Beijing Key Laboratory of Health Monitoring Control and Fault Self-Recovery for High-end Machinery,Beijing University of Chemical Technology,Beijing 100029,China;Henan Diesel Engine Industry Co.Ltd.,Luoyang 471039,Henan,China)

机构地区：[1]北京化工大学高端机械装备健康监控与自愈化北京市重点实验室,北京100029 [2]河南柴油机重工有限责任公司,洛阳471039

出　　处：《现代制造工程》2018年第10期144-148,75,共6页Modern Manufacturing Engineering

基　　金：863计划项目(2014AA041806);中央高校基本科研业务费专项资金资助项目(ZY1617)

摘　　要：为了探究气门间隙异常故障的诊断方法,分别通过仿真模拟与实验探究,运用ADAMS软件对配气系统核心部件进行建模,对不同气门间隙下部件的动力学行为进行模拟,探究故障机理和故障敏感特征。基于Teager能量算子,探究实际机组振动信号中气门间隙异常故障敏感特征的精确提取方法。在一台TBD234柴油机中模拟该故障,采集缸盖振动信号。结果表明,随间隙增大开启冲击相位推迟、关闭相位提前,峰值能量增大,验证了故障特征的敏感性和故障诊断方法的有效性。In order to study the abnormal valve clearance fault diagnosis method, by the simulation and experiment study, the core components of the gas distribution has been modeled in ADAMS, and the dynamic behaviors with different valve clearance has been simulated, in order to study the fault mechanism and the sensitive feature. Based on Teager energy operator, the accurate method to extract the sensitive feature from the actual vibration signal has been explored. This fault has been simulated in the TBD234 combustion engine test stand, vibration signal acquired. With the increasing of clearance, the phase of valve opening holds off, the phase of shutting is ahead of time, and the amplitude increases,which verifies the sensitivity of fault feature and effectiveness of the diagnosis method.

关 键 词：故障诊断 气门间隙异常 冲击提取 柴油机 

分 类 号：TH17[机械工程—机械制造及自动化]