盲源分离和小波消噪在碰摩声频信号分析中的应用研究

被引:9
作者
李熠
何永勇
李志农
褚福磊
机构
[1] 清华大学精密仪器与机械学系
关键词
盲源分离; 小波消噪; 碰摩故障诊断;
D O I
10.16579/j.issn.1001.9669.2005.06.001
中图分类号
TH17 [机械运行与维修];
学科分类号
摘要
碰摩是现代旋转机械运行中常见的一种故障,文中尝试从声频信号的角度对碰摩故障进行分析。在实际环境中,碰摩声频信号常常受到噪声的污染,文中将盲源分离和小波消噪方法相结合,使用P.S.(pre-separation de-noising,separation)和P.S.P.(pre-separation de-noising,separation,post-separation de-noising)方法对碰摩声频信号进行分析处理,大大提高了信号的信噪比,取得了比较理想的实验结果。
引用
收藏
页码:719 / 724
页数:6
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