基于序列匹配的螺旋桨轴频自动提取方法  

An automatic extraction method of propeller shaft frequency based on sequence matching

作　　者：杨日杰[1] 郑晓庆 韩建辉[1] 李大卫[2] YANG Rijie;ZHENG Xiaoqing;HAN Jianhui;LI Dawei(Institute of Naval Aeronautical Engineering,Yantai 264001,China;The 95972th Unit of PLA,Jiuquan 735018,China)

机构地区：[1]海军航空工程学院 [2]95972部队

出　　处：《振动与冲击》2018年第16期57-61,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金(61271444)

摘　　要：针对船舶、潜艇等水声目标螺旋桨轴频自动提取困难的问题,提出一种基于平均能量累积和脉冲序列匹配的水声目标螺旋桨轴频特征提取算法,算法首先将噪声不同频段的调制信息利用多频段融合改进方法对DEMON谱进行线增强,然后利用平均能量累积方法对与螺旋桨轴频及其谐波相关的线谱进行提取,由于提取的线谱所对应轴频或谐波次数不明确,最后算法通过序列匹配方法计算线谱对应的谐波次数,从而实现螺旋桨轴频的自动提取,通过实验验证,算法取得了较好效果。As it is difficult to extract the propeller shaft frequency of underwater acoustic targets automatically such as ships,submarines and so on,this paper proposed an extraction algorithm of propeller shaft frequency of underwater acoustic targets based on the average energy accumulation and pulse sequence matching.First,the algorithm enhanced the line spectrums of DEMON by fusing the modulated information of different frequency band with an improved multi-band fusion method.Then the line spectrums of the propeller shaft frequency or its harmonics was extracted by the average energy accumulation.Finally,the method of sequence matching was applied to calculate harmonic numbers of the line spectrums extracted,and the propeller shaft frequency was extracted automatically.As verified in the test,the algorithm works very well.

关 键 词：轴频提取 DEMON谱 平均能量累积 脉冲序列匹配 

分 类 号：O427.5[理学—声学]