基于希尔伯特变换和小波包节点能量法的齿轮箱故障诊断研究
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摘要
故障齿轮箱的振动信号中可能包含周期性的振幅和相位调制信号,在齿轮箱故障诊断中,解调成为一个重要的问题。在分析了齿轮振动信号的基础上,提出了一种基于希尔伯特变换和小波包节点能量法的故障诊断方法。通过一个包含调幅调相信息的仿真信号进行了验证,结果表明该方法能够有效提取调制信号,比使用小波包变换更有效。
The vibration signal of fault gearbox may contain periodic amplitude and phase modulation signal,so in gearbox fault diagnosis,demodulation is a major problem.Based on the analysis of gear vibration signal,proposed a fault diagnosis method which is based on hilbert transform and wavelet packet node energy method.A simulation signal which contains amplitude phase-modulation is used to verify the method,the results indicate this method can effectively extract modulation signal,and it is more effective than only use wavelet packet transform.
The vibration signal of fault gearbox may contain periodic amplitude and phase modulation signal,so in gearbox fault diagnosis,demodulation is a major problem.Based on the analysis of gear vibration signal,proposed a fault diagnosis method which is based on hilbert transform and wavelet packet node energy method.A simulation signal which contains amplitude phase-modulation is used to verify the method,the results indicate this method can effectively extract modulation signal,and it is more effective than only use wavelet packet transform.
引文
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[2]葛哲学,陈仲生.MATLAB时频分析技术及其应用[M].北京:人民邮电出版社,2006.
[3]樊永生.机械设备诊断的现代信号处理方法[M].北京:国防工业出版社,2009.
[4]杨洁明,熊诗波.小波包分析方法在齿轮早期故障特征提取中的应用[J].振动、测试与诊断,2000,20(4):269-272.
[5]曾宪伟,赵卫明,盛菊琴.小波包分解树结点与信号子空间频带的对应关系及其应用[J].地震学报,2008,30(1):90-96.
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