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一种Alpha稳定分布噪声下目标螺旋桨特征提取方法

王彬 侯越圣

引用本文: 王彬, 侯越圣. 一种Alpha稳定分布噪声下目标螺旋桨特征提取方法[J]. 电子与信息学报, doi: 10.11999/JEIT190916 shu
Citation:  Bin WANG, Yuesheng HOU. Extraction of Target Propeller Features in Alpha Distribution Noise[J]. Journal of Electronics and Information Technology, doi: 10.11999/JEIT190916 shu

一种Alpha稳定分布噪声下目标螺旋桨特征提取方法

    作者简介: 王彬: 女,1971年生,副教授,研究方向为信号分析与处理;
    侯越圣: 男,1995年生,硕士生,研究方向为信号分析与处理
    通讯作者: 王彬,commutech@163.com
  • 基金项目: 国家自然科学基金 (61572518)

摘要: 为了解决Alpha稳定分布噪声下目标螺旋桨特征提取问题,该文提出一种基于分数低阶循环谱的特征提取方法。首先,从理论上推导出脉冲噪声条件下舰船辐射噪声分数低阶循环谱,指出分数低阶循环谱中出现峰值与螺旋桨特征的关系。然后根据该关系,提出基于分数低阶循环谱的螺旋桨特征估计方法。最后,通过仿真实验验证该方法的性能,并通过实测数据进一步验证了算法有效性。

English

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  • 图 1  DEMON谱估计流程

    图 2  螺旋桨特征提取方法流程

    图 3  舰船辐射噪声波形

    图 4  $\alpha = 2.0$时的谱分析结果

    图 6  $\alpha = 1.2$时的谱分析结果

    图 5  $\alpha = 1.5$时的谱分析结果

    图 7  噪声特征指数对叶频估计性能影响

    图 8  混合信噪比对叶频估计性能影响

    图 9  AUV辐射噪声时域波形

    图 10  AUV辐射噪声不同频段循环谱分析结果

    表 1  AUV轴频估计结果

    距离(m)1212.52
    螺旋桨转速设定值(r/min)300300400400500
    轴频估计值(Hz)4.714.736.346.287.93
    估计误差(Hz)0.290.270.330.390.40
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文章相关
  • 通讯作者:  王彬, commutech@163.com
  • 收稿日期:  2019-11-14
  • 网络出版日期:  2020-05-16
通讯作者: 陈斌, bchen63@163.com
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