基于重排Gabor变换和Radon变换的特征提取技术
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摘要
基于重排Gabor变换和Radon变换理论,提出了基于重排Gabor变换和Radon变换的故障诊断技术。文章首先利用重排Gabor变换时频聚集性特点,对含噪信号进行重排Gabor变换,再将Gabor展开系数进行Radon变换,在Radon变换平面上提取像点,再进行Radon逆变换,实现信号降噪。仿真结果表明,该方法有效地抑制了噪声的干扰,成功地提取了故障特征信号。
According to the reassignment Gabor transform and Radon transform,and a feature extraction method based on the reassignment Gabor transform and Radon transform is proposed. Firstly,the reassignment Gabor transform is applied to the noise signal on the basis of its characteristics,and the Gabor coefficients Gabor transform are processed by the Radon transform,and the image point in Radon transform plane is selected,Then the de-noised Gabor coefficients could be obtained by the Radon inverse transform. The simulated results indicate that this method can effectively reduce the noise interference,and the fault features are extracted successfully for mechanical diagnosis.
引文
[1]郑旭,郝志勇,金阳,等.自适应广义S变换在内燃机气缸盖振动特性研究中的应用[J].振动与冲击,2011,30(1):167-170.
    [2]李兴慧,胡小青,阴俊霞,等.基于Gabor变换的特征提取技术[J].组合机床与自动化加工技术,2014(1):29-34.
    [3]李志农,何永勇,褚福磊.基于Wigner高阶谱的机械故障诊断的研究[J].机械工程学报,2005,41(4):119-122.
    [4]郑爽.基于现代信号分析的滚动轴承故障诊断的研究[J].组合机床与自动化加工技术,2005(6):56-58.
    [5]范寅夕,冯志鹏,高建超.基于重排时频分布的齿轮故障诊断研究[J].振动与冲击,2012,31(S):454-457.
    [6]周竹生,陈高翔.几种重排算法在地震信号处理中的实验分析[J].煤田地质与勘探,2013,41(1):72-77.
    [7]邓灵,张天骐,金静,等.重排谱图在跳频信号参数估计中的应用[J].计算机工程与设计,2013,34(10):3422-3426.
    [8]林正青,牟林,彭圆,等.时频分布重排方法在水下目标回声识别中的应用[J].应用声学,2014,33(1):87-93.
    [9]武开有,钟志明,徐以涛,等.基于重排Gabor谱方法的跳频信号参数估计[J].电子信息对抗技术,2009,24(3):11-14.
    [10]张德平.Matlab数字图像处理[M].北京:机械工业出版社,2009.

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