张伟萍,付民,张海燕,李欣

• 1:中国海洋大学信息科学与工程学部

摘要(Abstract)：

本文提出一种针对非平稳水声信号的改进WOA-VMD小波阈值去噪方法，首先，引入余弦收敛因子和自适应权值提升鲸鱼优化算法(WOA)的精度，然后利用WOA选取水声信号变分模态分解(VMD)的最佳参数组合。引入一种可调阈值函数克服传统阈值函数量化过程的缺陷，考虑到不同分解尺度下噪声小波系数的衰减特性，采用分层阈值法对有效信号分量进行去噪处理。通过仿真实验和实测数据的降噪分析，证明了该方法的有效性和应用价值，新方法的去噪性能优于其他方法。

关键词(KeyWords)： 水声信号;小波阈值处理;变分模态分解;鲸鱼优化算法

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(91958206)资助~~

作者(Author): 张伟萍,付民,张海燕,李欣

DOI: 10.16441/j.cnki.hdxb.20220054

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