伪Wigner-Ville分布在电机轴承故障诊断中的应用  

Application of Pseudo Wigner-Ville Distribution to Fault Diagnosis in Motor Bearing

作　　者：薛松[1] 程珩[1] 杨勇[1] 

机构地区：[1]太原理工大学机械电子工程研究所,山西太原030024

出　　处：《机械工程与自动化》2008年第4期98-100,共3页Mechanical Engineering & Automation

基　　金：山西省自然科学基金资助项目(20050147)

摘　　要：机械系统故障信号往往是非平稳的,Wigner-Ville分布可从时域特征与频域特征的结合途径揭示非平稳信号的构成本质[1],但该分布存在交叉项的问题,影响了诊断的准确性。本文利用伪Wigner-Ville(PWD)分布的故障诊断方法,可以有效地解决Wigner-Ville分布存在的问题,提高了故障诊断的准确性。Machine fault signal is usually composed of non-stationary signals. Wigner--Ville distribution reveals the characteristic of signals by means of the combination of the features of time and frequency domains. But this distribution has the question of cross term,influencing the veracity of diagnosis. The article introduced the fault diagnosis method on pseudo Wigner--Ville,which may effectively solve the problem of Wigner--Ville distribution,and improve the veracity of diagnosis.

关 键 词：伪Wigner-Ville分布 电机轴承 故障诊断 

分 类 号：TH133.3[机械工程—机械制造及自动化] TH165.3