基于小波簇的包络解调方法及其在故障诊断中的应用(英文)

被引:11
作者
姜万录 [1 ]
Sarah KSpurgeon [2 ]
John ATwiddle [2 ]
Fernando SSchlindwein [2 ]
机构
[1] 燕山大学机械工程学院
[2] 莱斯特大学工程系大学
关键词
类Morlet小波簇; 带通滤波; 包络解调; 故障诊断; 干式真空泵; 轴承故障;
D O I
10.19650/j.cnki.cjsi.2007.06.003
中图分类号
TH165.3 [];
学科分类号
摘要
本文提出了一种基于小波簇的带通滤波和包络解调方法。通过合理地选择小波参数,用多个单类Morlet小波组成的小波簇可构成具有零相移、平顶通带及快速衰减过渡带特性的带通滤波器,可用于提取振动信号的高频自然频率成分。由于该小波簇的虚部是实部的Hilbert变换,可用于实现包络解调提取振动信号在高频谐振带的包络成分。将该方法用于干式真空泵轴承故障的诊断中,结果表明可有效地提取故障特征频率,实验结果验证了该方法的有效性。
引用
收藏
页码:973 / 980
页数:8
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