基于二次分数低阶协方差的被动式声源定位方法

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (24) : 259-266.

论文

基于二次分数低阶协方差的被动式声源定位方法

刘小松1，郭靖豪1，柳鹏2，任玮1，单泽彪1,2

作者信息 +

A passive source location method based on quadratic fractional low order covariance

LIU Xiaosong1, GUO Jinghao1, LIU Peng2, REN Wei1, SHAN Zebiao1,2

Author information +

文章历史 +

摘要

针对现有的被动式声源定位算法在强脉冲噪声环境下抗干扰能力弱、定位误差大等问题，提出了一种基于二次分数低阶协方差的被动式声源定位估计方法。该方法首先构建了一个多点共用的最优四基阵阵列结构，利用有界非线性Sigmoid函数对含有脉冲噪声的接收信号进行处理；然后对处理后的阵元间信号进行二次分数低阶协方差运算，即求得阵元信号的自分数低阶协方差和两阵元间信号的互分数低阶协方差之后，再次计算二者的互分数低阶协方差，以期更大程度上抑制脉冲噪声的影响；最终根据求得的时延信息对声源进行定位计算。通过定位实验对所提方法进行了有效性验证。

Abstract

A passive acoustic source localization estimation method based on second-order fractional lower-order covariance is proposed to address the issues of weak anti-interference capability and large localization errors in the presence of strong impulse noise. This method first establishes an optimal four-element array structure with multiple shared points. Then, it employs a bounded non-linear Sigmoid function to process the received signals containing impulse noise. Subsequently, the signals between array elements after processing are subjected to second-order fractional lower-order covariance operation. This involves calculating the self-fractional lower-order covariance of the first element signal and the cross-fractional lower-order covariance between correlated array element signals. The resulting cross-fractional lower-order covariance is then computed once again to further suppress the influence of impulse noise. Finally, source localization calculations are performed based on the obtained delay information. The effectiveness of the proposed method is validated through experiments.

导出引用

刘小松1, 郭靖豪1, 柳鹏2, 任玮1, 单泽彪1, 2. 基于二次分数低阶协方差的被动式声源定位方法[J]. 振动与冲击, 2024, 43(24): 259-266

LIU Xiaosong1, GUO Jinghao1, LIU Peng2, REN Wei1, SHAN Zebiao1, 2. A passive source location method based on quadratic fractional low order covariance[J]. Journal of Vibration and Shock, 2024, 43(24): 259-266

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