Identification of short wave irregularities in high speed railway tracks based on improved techniques Hilbert-Huang transform

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Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (10) : 241-249.

ZHOU Suxia1,2, JI Ze*1,2, QU Zhi3, JIN Yusong1,2

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Abstract

In order to accurately and reliably identify short-wave irregularities on high-speed railway tracks, an improved Hilbert-Huang algorithm is proposed to solve the problem of modal aliasing and endpoint effects in the Hilbert-Huang transform method. The modified Akima method is used to optimize the piecewise cubic Hermite interpolation method, and re-weight the interval of the constructed AM and FM signal, which effectively avoids the overshoot and undershoot problems of the envelope curve and maintains smoothness; based on the local characteristic scale extension method of the boundary, the constructed composite signal is processed to suppress divergence in endpoint effects. The improved Hilbert-Huang algorithm is compared with EEMD algorithm. The results show that the improved Hilbert-Huang algorithm has better signal separation effect. Based on the improved Hilbert-Huang algorithm, the measured signal of short-wave irregularities on high-speed railway tracks is decomposed, and the marginal spectrum and Hilbert spectrum are used to analyze the IMF component. The obtained wavelength and position information are in good agreement with the actual measurement results.

Key words

Track shortwave roughness / Hilbert Huang Transform / mode mixing / Envelope curve

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ZHOU Suxia1, 2, JI Ze1, 2, QU Zhi3, JIN Yusong1, 2. Identification of short wave irregularities in high speed railway tracks based on improved techniques Hilbert-Huang transform[J]. Journal of Vibration and Shock, 2025, 44(10): 241-249

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