Combined denoising method of vehicle acceleration signal based on EMD and IIR filtering

FAN Wenjian,MAO Wanxin,WUJiang

Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (20) : 307-312.

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (20) : 307-312.

Combined denoising method of vehicle acceleration signal based on EMD and IIR filtering

  • FAN Wenjian1,MAO Wanxin2 ,WUJiang2
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Abstract

To solve the problem that the noise reduction result is not ideal because of the aliasing of useful signal and noise signal in high frequency IMF component in traditional EMD decomposition, a joint noise reduction method based on EMD decomposition and IIR low-pass digital filter was proposed. On the basis of EMD decomposition, the IIR low-pass digital filter was used to filter the high-frequency IMF component, and the filtered signal was reconstructed with the low-frequency IMF component to get the denoising signal. Finally, a noise reduction test was carried out with a vehicle acceleration signal, and the results show that IIR low-pass digital filter can effectively improve the problem of signal-to-noise aliasing in high-frequency IMF. It is verified that the effect of this noise reduction method is better than that of EMD decomposition and IIR low-pass digital filtering.

Key words

acceleration signal / noise reduction / EMD decomposition / IIR digital filtering

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FAN Wenjian,MAO Wanxin,WUJiang. Combined denoising method of vehicle acceleration signal based on EMD and IIR filtering[J]. Journal of Vibration and Shock, 2021, 40(20): 307-312

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