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.
2023,45(10): 41-45 收稿日期：2022-09-15
DOI：10.3404/j.issn.1672-7649.2023.10.009
分类号：U666.73
基金项目：国家自然科学基金资助项目(11704345)
作者简介：宋君才(1978-),男,硕士,工程师,研究方向为水声工程、水声信号处理
