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首页> 外文期刊>Mechanical systems and signal processing >An adaptive extraction method for rail crack acoustic emission signal under strong wheel-rail rolling noise of high-speed railway
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An adaptive extraction method for rail crack acoustic emission signal under strong wheel-rail rolling noise of high-speed railway

机译：高速铁路强轮轨滚动噪声下轨裂声声发射信号的自适应提取方法

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摘要

Aiming to detect the weak rail crack signal under strong Wheel-rail Rolling Noise (WRRN) in high-speed railway by Acoustic Emission (AE) technology, a Hurst exponent-improved Adaptive Line Enhancer (ALE) is put forward. The Hurst exponent is adopted to describe the irregularity and fractality property, and is introduced into the cost function of ALE through its power-law relation with the structure function of the fractional Brownian motion so that the optimal objective of the adaptive filter is improved to adapt to the rail crack signal. Compared with the ALE and the Shannon entropy-improved ALE, the proposed method has the best performance. The Hurst exponent-improved ALE not only suppresses the strong WRRN in high-speed condition, but also enhances the rail crack signal and the signal to noise ratio to a large extent. Moreover, with the entire frequency components of the desired signal reserved, the method has the benefits of low computational cost and simple implementation. The research offers a method for extraction of the weak rail crack signal, solves the WRRN problem, and makes AE technology applicable in high-speed rail defect detection.
机译：旨在通过声发射（AE）技术在高速铁路中检测强轮轨滚动噪声（WRRN）下的弱铁路裂纹信号，提出了一个肿瘤指数改进的自适应线增强器（ALE）。采用赫斯特指数来描述不规则性和性交属性，并通过其幂律关系引入ALE的成本函数，与分数褐色运动的结构功能，使自适应滤波器的最佳目标得到改善以适应到轨道裂缝信号。与ALE和Shannon熵改善的ALE相比，所提出的方法具有最佳性能。赫斯特指数改进的ALE不仅抑制了高速条件的强烈WRRN，而且还在很大程度上提高了轨道裂缝信号和信噪比。此外，通过保留所需信号的整个频率分量，该方法具有低计算成本和简单实现的益处。该研究提供了一种提取弱轨裂纹信号的方法，解决了WRRN问题，使AE技术适用于高速轨道缺陷检测。

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  • 来源
    《Mechanical systems and signal processing》 |2021年第6期|107546.1-107546.11|共11页
  • 作者

    Qiushi Hao; Yi Shen; Yan Wang; Jian Liu;

  • 作者单位

    Department of Control Science and Engineering Harbin Institute of Technology 150001 PR China Department of Instrumentation Science and Engineering Harbin Institute of Technology 150001 PR China;

    Department of Control Science and Engineering Harbin Institute of Technology 150001 PR China;

    Department of Control Science and Engineering Harbin Institute of Technology 150001 PR China;

    Department of Instrumentation Science and Engineering Harbin Institute of Technology 150001 PR China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    High-speed railway; Acoustic emission; Rolling contact fatigue; Hurst exponent; Adaptive line enhancer;

    机译：高速铁路;声学发射;滚动接触疲劳;赫斯特指数;自适应线增强剂;

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