小波分析在汽车发动机机械故障诊断中的应用  

Application study of wavelet analysis in the fault diagnosis of automotive engine

作　　者：张守伟[1] 胡博春[1] 郭淑清[1] 

机构地区：[1]长春工业大学电气与电子工程系,长春132001

出　　处：《仪器仪表用户》2006年第4期95-96,共2页Instrumentation

摘　　要：文中阐述了汽车发动机机械故障诊断的理论方法,讨论了小波变换的分析方法。由于小波变换具有传统频谱分析方法所没有的时一频分析特征,特别适合于非平稳信号的分析与处理,应用该方法对实测信号进行了有效的时频分析。In this paper,the theory method of engine fault diagnosis Is expatiated, and the analysis method of Wavelet transform Is discussed ,Owing to the Wavelet transform has the characteristic of time- frequency analysis which does not had by the traditional frequency-chart analysis method. Especially, it is applied to analyze and dispose on non-tranquilization signal and it is effective on time - frequency analysis of actual signal.

关 键 词：信号 傅里叶变换 小波变换 故障诊断 

分 类 号：TP183[自动化与计算机技术—控制理论与控制工程]