李宏坤   

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Language:English

Paper Publications

Title of Paper:局域波法和高阶统计量在压缩机气阀状态监测中应用

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Date of Publication:2007-01-30

Journal:大连理工大学学报

Included Journals:EI、PKU、ISTIC、CSCD、Scopus

Volume:47

Issue:1

Page Number:45-49

ISSN No.:1000-8608

Key Words:状态监测;局域波法;高阶统计量;往复式压缩机;气阀

Abstract:为解决传统信号处理方法分析非平稳时变信号的不足,提出了一种适用于往复式压缩机气阀状态特征提取的新方法.首先使用局域波法将实测信号分解为多个基本模式分量,经过希尔伯特变换得到各分量的时频谱;然后计算归一化后幅值信号的高阶统计量,这些统计量很好地反映了气阀的劣化过程.通过对现场工作的聚乙烯二次压缩机组合阀振动信号的分析,验证了该方法在往复压缩机状态监测中的有效性和实用性.

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