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3D spectral analysis for vibration signals by wavelet-based demodulation

机译：基于小波解调的振动信号3D频谱分析

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摘要

In this paper, a wavelet-based demodulating function is proposed to apply in 3D spectral analysis for vibration signals. In the function, there are three parameters required to assign for adjustment and designation of the filtering passband, which are the low cut-off frequency, the high cut-off frequency and the dilation. Accordingly, it would be convenient to apply in the high-frequency resonance technique. In addition, by sweeping the filtering passband from a low-frequency band to a high-frequency band, a 3D spectrum could be constructed to describe how energy distribution between the instantaneous frequency and the filtering passband for a vibration signal. The 3D spectrum would be helpful to give a clear view of both characteristic frequencies and system resonances, and possesses the advantage of minimising the interventions by the end-user.
机译：本文提出了一种基于小波的解调函数，将其应用于振动信号的3D频谱分析中。在该功能中，需要为滤波通带的调整和指定分配三个参数，分别是低截止频率，高截止频率和膨胀。因此，将其应用于高频共振技术将是方便的。另外，通过将滤波通带从低频频段扫描到高频频段，可以构建3D频谱来描述振动信号在瞬时频率和滤波通带之间的能量分布。 3D频谱有助于清晰显示特征频率和系统谐振，并具有将最终用户的干预降到最低的优势。

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