基于小波SVD的光纤光栅振动系统消噪算法

针对小波阀值法对噪声非均匀分布振动信号消噪差的缺点,提出了奇异值分解（SVD）结合小波阀值消噪的算法。采用截断法构造出包含信号信息及非均匀噪声的相关矩阵并进行SVD,得到一系列正交子空间,将非均匀噪声相对均匀地分解到子空间中。选取奇异值最大的子空间分量重构信号并对此信号进行了小波阀值消噪。结果表明,该方法适用于非均匀噪声干扰下的振动信号提取,与直接小波消噪相比,提取出的信号失真更小,信号有效成份更完整。...

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Published inGuangtongxin Yanjiu pp. 14 - 16
Main Authors 李靖, 毕卫红, 刘微
Format Journal Article
LanguageChinese
Published 《光通信研究》编辑部 01.01.2010
Subjects
光纤光栅;振动;奇异值分解;小波阀值消噪
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ISSN1005-8788
DOI10.3969/j.issn.1005-8788.2010.06.005

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Abstract 针对小波阀值法对噪声非均匀分布振动信号消噪差的缺点,提出了奇异值分解（SVD）结合小波阀值消噪的算法。采用截断法构造出包含信号信息及非均匀噪声的相关矩阵并进行SVD,得到一系列正交子空间,将非均匀噪声相对均匀地分解到子空间中。选取奇异值最大的子空间分量重构信号并对此信号进行了小波阀值消噪。结果表明,该方法适用于非均匀噪声干扰下的振动信号提取,与直接小波消噪相比,提取出的信号失真更小,信号有效成份更完整。
AbstractList 针对小波阀值法对噪声非均匀分布振动信号消噪差的缺点,提出了奇异值分解（SVD）结合小波阀值消噪的算法。采用截断法构造出包含信号信息及非均匀噪声的相关矩阵并进行SVD,得到一系列正交子空间,将非均匀噪声相对均匀地分解到子空间中。选取奇异值最大的子空间分量重构信号并对此信号进行了小波阀值消噪。结果表明,该方法适用于非均匀噪声干扰下的振动信号提取,与直接小波消噪相比,提取出的信号失真更小,信号有效成份更完整。
Author 刘微
李靖
毕卫红
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SubjectTerms 光纤光栅;振动;奇异值分解;小波阀值消噪
Title 基于小波SVD的光纤光栅振动系统消噪算法
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