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    基于相位法的密集小波公共脊线提取方法

    2013-06-12 中国测试蒋永华, 莫晓强, 尤佳伊, 沈梦杰, 沈凤良

    (浙江师范大学精密机械研究所,浙江 金华 321004)
    摘  要:针对传统小波脊线提取方法对密集脊线的提取存在着分辨率不足等缺点,提出一种基于相位法的密集小波公共脊线提取方法。通过分析密集单频叠加信号和密集调频叠加信号的小波公共脊线的相位特点,利用小波脊线的相位法来提取信号的公共脊线。仿真算例结果表明:该方法能有效地提取出密集小波公共脊线,且方法简单、准确,具有较快的收敛性。将其应用于实际齿轮箱故障分析中,能有效地提取故障特征,诊断出齿轮箱故障。
    中图分类号:HT165.3;TP277;TN911.2;TP301.6      文献标志码:A       文章编号:1674-5124(2013)03-0001-05
    Closely wavelet common ridge extraction method based on phase extraction
    JIANG Yong-hua, MO Xiao-qiang, YOU Jia-yi, SHEN Meng-jie, SHEN Feng-liang
    (Institute of Precision Machinery,Zhejiang Normal University,Jinhua 321004,China)
    Abstract: In order to improve the precision of closely wavelet ridge extracted by conventional method, a new method for extracting closely wavelet common ridge based on phase extraction is proposed. The common-ridge phase characteristics of close single frequency signals and frequency modulated signals are fully analyzed, then a common ridge extraction method is put forward based on phase extraction, and finally the problems in signal reconstruction is solved. The proposed method is simple, accurate and with rapid convergence. The results of simulation example show that the proposed method is feasible and effective. Finally, the result of gearbox analysis shows that this method can extract fault characteristics of gearbox effectively.
    Key words: wavelet ridge; phase method; closely ridge; wavelet transform
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    小波脊线;相位法;密集脊线;小波变换 相关
     
     
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