李宏坤   

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Language:English

Paper Publications

Title of Paper:Hilbert谱特征提取与支持向量机的状态识别方法研究

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Date of Publication:2009-06-25

Journal:振动与冲击

Included Journals:PKU、ISTIC、CSCD

Volume:28

Issue:6

Page Number:131-134

ISSN No.:1000-3835

Key Words:Hilbert时频谱;特征提取;重心;循环平稳性;支持向量机

Abstract:介绍一种新的基于振动信号分析的状态识别方法,即Hilbert时频谱重心与支持向量机相结合的进行设备故障诊断的分类方法.根据信号的循环平稳性,采用同步平均对信号进行预处理,实现从时域到角度域的转换;之后进行经验模式分解,计算得到Hilbert时频谱;在此基础上计算Hilbert时频谱的重心,构建一个特征向量.最后采用支持向量机进行训练和学习,实现设备的状态识别.并以滚动轴承的状态识别为例证明此方法的有效性.研究表明,此方法有助于设备预知维修的发展.

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