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.
出处
《振动工程学报》
EI
CSCD
北大核心
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)
关键词
轴承
故障诊断
带通核函数
交叉项“虚互谱能量”
the impact faults of bearing
the transmission band core function
cross-terms false spectral energy
