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R_D算法点阵成像

于 2021-01-08 发布

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下载积分: 1 下载次数: 5

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说明：雷达成像仿真程序，模拟点阵成像，距离多普勒成像方法RD(radar imaging ,range doppler method)

文件列表：

jibian.mat, 1006957 , 2012-07-25
lixiang.mat, 1007077 , 2012-07-25
recsig.m, 4433 , 2012-07-25
R_Dalg.m, 2590 , 2012-07-25
sarpara.m, 1924 , 2012-07-25

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2014-09-30 17:15:12下载

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2020-03-12 11:23:16下载

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2020-07-07 19:58:57下载

积分：1
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首先将非平稳的故障振动信号进行双树复小波包分解，得到不同频带的分量；然后对每个分量求其峭度值和相关系数并进行比较；最后选取峭度值和相关系数较大的分量进行软阈值降噪和双树复小波包重构，即可有效地消除振动信号中噪声的干扰，同时保留信号中的有效信息即实现了故障特征信息的提取。(In view of the above situation, a new fault diagnosis method is proposed based on dual-tree complex wavelet packet transform and threshold de-noising. Firstly, the non-stationary fault signal is decomposed into several different frequency band components through dual-tree complex wavelet packet decomposition. Secondly, Kurtosis and the cross-correlation coefficient of each component are obtained and compared. Due to the kurtosis reflecting the signal variations, if the kurtosis value is bigger, the degree of the change of signal is bigger too. The correlation coefficient can reflect the proximity between the component and the original signal at the same time, the correlation coefficient is bigger, the more similar with the original signal. Finally, the components that have a bigger value are chosen to be de-noised by a soft threshold and reconstructed by dual-tree complex wavelet packet transform. The noise interference was eliminated effectively, and the effective si)

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2018-01-11 09:04:48下载

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2009-07-03 01:32:16下载

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2017-06-23 12:02:08下载

积分：1

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R_D算法点阵成像

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