摘要
在研究舰船辐射噪声特性的基础上,对其连续谱、调制包络、线谱、声源级及多普勒频偏进行了建模与仿真,连续谱采用FIR滤波方法仿真,调制包络由高斯脉冲串组成,对舰船辐射噪声随距离、速度、方位变化的动态特性进行模拟。通过仿真出来的信号进行功率谱分析,表明该仿真能较好地模拟舰船动态运动的噪声辐射声学特征。
The propagation about radiating noise from vessels is studied in this paper, continuous spectra model, line spectra model and modulated spectra model are established. Let the white noise added signals which have line spectrum pass through a FIR digital filter ,the expected signal of ship radiated noise can be obtained from the outputs of filter. When ship and target is relative moving, the dynamic feature of distance、velocity and orientation are simulated. By signal analysing to the output of the simulation...
出处
《舰船电子工程》
2008年第2期95-97,149+166,共5页
Ship Electronic Engineering
关键词
辐射噪声
线谱
连续谱
调制包络谱
动态特性
radiating noise
line spectra
continuous spectra
modulated spectra
dynamic property
