摘要
舰船辐射噪声的仿真模拟是测试被动声呐系统及声诱饵的关键技术。本文通过对舰船辐射噪声信号的声学特性分析,对其线谱、连续谱和调制包络进行了建模与仿真,模拟生成了辐射噪声信号,并研制了基于DSP硬件系统的舰船辐射噪声模拟器。根据噪声的连续谱特性,提出了一种用FIR滤波器实现宽带噪声信号模拟的方法,建立了辐射噪声的仿真模型。通过对模拟器输出信号进行功率谱分析,表明该模拟器能很好的反映舰船辐射噪声信号的基本声学特性。
The simulation of ship-radiated noise is the key technique of testing passive sonar system and acoustical decoy.Through analyzing the acoustic characteristics of ship-radiated noise,the line spectrum,continuous spectrum and amplitude modulation are modeled and simulated.The ship-radiated noise is simulated.And the ship-radiated simulator based on DSP hardware systems is proposed.In this paper,according to the frequency-domain feature of the noise with continuous spectrum,simulation of the broadband noise with FIR filter is presented.And the simulation model of ship radiated noise is given.By signal processing to the output of the simulator with the power spectrum,the results show that the simulator can reconstitute typical acoustic signatures of ship-radiated noise.
出处
《舰船科学技术》
2010年第4期121-124,133,共5页
Ship Science and Technology
基金
海军"十一五"预研基金资助项目(4010703010102)
关键词
舰船辐射噪声
噪声模拟器
宽带连续谱噪声
ship-radiated noise
noise simulator
broadband noise with continuous spectrum
