MEMD分解在舰船非平稳信号处理中的应用

摘要

在对舰船非平稳信号进行研究和分析时,希尔伯特-黄变换(HHT)方法表现出了其优越性,但此方法的核心算法EMD还存在缺陷.本文针对模态分解中出现的模态混迭现象进行分析,引入多分辨分析技术对经验模态分解方法进行改进一基于多分辨分析的经验模态分解方法(MEMD).通过对信号模拟试验,并与原始EMD方法的结果作比较,得出了此法的有效性与可行性.%Hilbert-Huang transform has show the advantage when used in non-stationary signal analysis on warship, but the core-arithmetic EMD was defective. The text focus the mode mixing phenomenon,improve the new method-based on multi-distinguish analysis EMD( MEMD) . Test on signal, and compared with the result of the origin EMD,got the effectiveness and feasibility of this method.