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基于Morlet小波相干分析的汽车声源识别

, PP. 194-196

Keywords: 声源识别,非平稳信号,Morlet小波变换,相干估计

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Abstract:

为适应汽车加速噪声非平稳工作过程声源识别的需要,提出了一种基于连续小波变换的时频相干估计方法。应用该方法从时频空间揭示了汽车加速时,标准测点噪声信号与发动机近场噪声信号的关系。与基于FFT的估计方法对比表明,该方法能够较好地识别局部时间段、低信噪比条件下2个噪声信号的关联程度。

References

[1]  Roth P R. Effective measurements using digital signal analysis ( correlation, transfer and coherence functions in measurements, using digital signal analysis) [J ]. IEEE Spectrum, 1971,8(4) : 62- 70.
[2]  Chung J Y, Crocker M J, Hamilton J F. Measurement of frequency responses and the multiple coherence function of the noise-generation system of a diesel engine[J]. The Journal of the Acoustical Society of America, 1975, 58(3) :635- 642.
[3]  Christopher Torrence, Compo G P. A practical guide to wavelet analysis [J]. Bulletin of the American Meteorological Society, 1998, 79 (1): 61-78.
[4]  Grinsted A, Moore J C, Jevrejeva S. Application of the cross wavelet transform and wavelet coherence to geophysical time series[J]. Nonlinear Process Geophys, 2004(11) : 561 - 566.
[5]  靳晓雄.现代信号分析技术在轿车噪声源识别中的应用[J].振动.测试与诊断,1997,17(3):43-48.
[6]  贾继德 陈容刚 邱峰 等.内燃机故障信号特性分析及诊断策略[J].农业机械学报,2005,36(12):39-42.
[7]  Gurley K, Kijewski T, Kareem A. First and higher order correlation detection using wavelet transforms [J]. Journal of Engineering Mechanics, 2003, 129(2) : 188-201.
[8]  Wang W J, McFadden P D. Application of orthogonal wavelets to early gear damage detection[J]. Mechanical Systems and Signal Processing, 1995,9(5) :497-507.

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