摘要
大型旋转机械的故障在发生或发展时,其运行过程是具有明显非平稳特性的瞬态过程。通常的针对单通道信息的时频分析不能准确提取瞬态过程的特征信息。本文结合矢谱分析(Vector-Spectrum)和Wigner-Ville分布(WVD)技术提出了矢Wigner-Ville分布分析方法。它融合了转子同截面两通道图谱中各自存在的振动分量,能准确地反映转子发生故障时的瞬态过程特征量变化。工程实际应用表明: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 proces- ses. The vector Wigner-Ville distribution was brought forward based on the Vector-Spectrum and the Wigner-Ville 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
《机床与液压》
北大核心
2008年第5期195-197,212,共4页
Machine Tool & Hydraulics
基金
国家自然科学基金资助项目(编号50675209)
河南省杰出人才创新基金项目(编号0621000500)
