基于循环调制谱熵的螺旋桨噪声分频段调制特征提取方法  

The extract method for subband modulation characteristics of propeller noise based on cyclic modulation spectrum entropy

作　　者：宋君才 王一鸣 SONG Jun-cai;WANG Yi-ming(The Seventh Military Representation Office of the Navy in Shanghai,Shanghai 201108,China;Shanghai Marine Electronic Equipment Research Institute,Shanghai 201108,China)

机构地区：[1]海军驻上海地区第七军事代表处,上海201108 [2]上海船舶电子设备研究所,上海201108

出　　处：《舰船科学技术》2023年第10期41-45,共5页Ship Science and Technology

基　　金：国家自然科学基金资助项目(11704345)。

摘　　要：针对船舶螺旋桨辐射噪声信号调制特征分频段分布的特点,对船舶螺旋桨辐射噪声分频段加权融合调制谱提取方法进行研究,提出基于循环调制谱熵的船舶螺旋桨辐射噪声分频段加权融合调制谱提取方法。采用循环谱方法获得船舶螺旋桨辐射噪声循环调制谱,然后基于循环调制谱熵估计分频段调制谱融合的加权系数,最后利用分频段加权系数得到融合后的调制谱。仿真试验和实测数据验证了该方法的有效性。According to the modulation characteristics of marine propeller radiated noise signal in different frequency bands,the method of weighted fusion modulation spectrum extraction of marine propeller radiated noise in different frequency bands is studied.Modulation spectrum entropy is proposed based on cyclic spectrum of ship radiated noise of propeller points weighted fusion modulation spectrum extraction method,first of all,the cyclic spectrum method for ship radiation noise of propeller cycle modulation spectrum,and then based on cycle modulation spectrum entropy estimation points frequency modulation fusion of the weighted coefficient,finally,the DEMON was obtained by using the modulation spectrum frequency weighted coefficient fusion processing.The effectiveness of this method is verified by simulation and measured data.

关 键 词：循环谱 循环调制谱 螺旋桨噪声 频段融合 调制谱 

分 类 号：U666.73[交通运输工程—船舶及航道工程]