摘要
虽然 Wigner- Ville分布具备时 -频分布的优点 ,但 Wigner- Ville分布的一个致命缺点就是交叉干扰项的存在 ,并影响其广泛应用。本文介绍了 Wigner双谱、Wigner三谱 ,以及如何选用合适的核函数消除交叉干扰项的影响。并以齿轮为实验对象 ,成功应用上述方法消除交叉干扰项 ,达到诊断齿轮故障的目的。
Because the Wigner-Ville distribution has the advantages of so many time-frequency distributions,it attracts wide attention from engineering.But its shortcoming,cross-term,limits its' wildly application in industry.This paper introduces Wigner Bispectrum,Wigner Trispectrum and the how of choosing a kernel function to remove the affection of cross-term.Finally,an experiment on gears is described,which is successful in removing the cross-term with the above method for the fault diagnosis for gears.
出处
《振动工程学报》
EI
CSCD
北大核心
2003年第2期247-250,共4页
Journal of Vibration Engineering
基金
攀登预选资助项目 (编号 :PD95 2 190 8)
