摘要
大型旋转机械的转子运动是一空间运动。转子故障在发生或发展时,其运行过程具有明显非平稳特性的瞬态过程。通常针对单通道信息的时频分析并不能全面提取瞬态过程的特征信息。结合空间域矢谱(Vector-spectrum in space-domain)分析和Wigner-Ville分布(Wigner-Ville Distribution,WVD)技术提出了空间域矢Wigner-Ville分布分析方法。它融合了转子同截面三通道图谱中各自存在的振动分量,能全面、准确地反映转子发生故障时的瞬态过程特征量变化。工程实践应用表明:空间域矢Wigner-Ville分布分析对于旋转机械故障诊断是一种新的、较为实用的信息融合方法。
When the faults of the large rotary machinery happen or develop,the moving processes of the machinery are obviously transient processes.The usual analysis in time-frequency domain to a single channel can＇t truly abstract the information of the processes.The vector Wigner-Ville distribution of the vector-spectrum in space-domain is brought forward based on the vector-spectrum in space-domain and the Wigner-Viue Distribution（WVD）.It can fuse the vibration information of the two channels fixed at a section of the rotor and reflect exactly the change of the characteristic in the transient processes.Engineering practice indicates that the vector Wigner-Ville distribution is a new and usable method for rotary machinery fault diagnosis.
出处
《现代制造工程》
CSCD
2007年第12期13-15,44,共4页
Modern Manufacturing Engineering
基金
国家自然科学基金资助项目(50675209)
河南省杰出人才创新基金项目(0621000500)
