轴承故障交叉项时频诊断方法的研究  

Diagnosis of bearing faults based on cross-terms time-frequency method

作　　者：杨龙兴[1] 贾民平[2] 王强锋[3] 

机构地区：[1]江苏技术师范学院机械学院,江苏常州213001 [2]东南大学机械学院,江苏南京210001 [3]江苏工业学院,江苏常州213001

出　　处：《振动工程学报》2008年第1期66-70,共5页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(50475078);江苏省高校自然科学基金资助项目(07KJB460026)

摘　　要：在分析调幅信号Wigner-Ville交叉项分布特征的基础上,提出了使用交叉项"虚互谱能量"诊断调幅型机械故障的新方法,并利用设计的带通核函数,提取交叉项"虚互谱能量",最后使用具有调幅故障的轴承冲击共振滤波数据,验证了方法在实际应用中的有效性。Since the bearing impact faults exhibit the non-stationary characteristics, the diagnostic method of time-frequency distribution is perhaps possessed of advantage. Based on Wigner-Ville cross-term distribution properties of amplitude modulation signal, this paper presents an approach of cross-terms false spectral energy to diagnose machinery faults, and the trans-mission band core function was designed to extract the cross-terms false spectral energy. Finally, the impact experimental data of bearing was given to show the approach availability.

关 键 词：轴承 故障诊断 带通核函数 交叉项“虚互谱能量” 

分 类 号：TN911[电子电信—通信与信息系统] TP206[电子电信—信息与通信工程]