摘要
为得到逼真的舰船辐射噪声的仿真数据,可通过对典型实测噪声结果数据进行分析,根据特征线谱生成线谱所在频段频谱信号,将其它频段置零,进而在时域重构线谱信号,再利用窗函数法设计出一个具有与其连续谱特性相一致的特定幅频响应的FIR滤波器,在时域重构连续谱信号,从而实现舰船辐射噪声信号重构。仿真结果表明,该方法能够较真实地重构舰船辐射噪声,其结果可作为半实物仿真试验信号源。
In order to achieve the lifelike simulation signal of warship radiated noise, analyzing in result data of typical measured noise, the spectrum signal of the frequency bands which contain line spectrum was obtained via feature lin spectrum while other bands were set to zero, then the line spectrum signals was reconstructed in time domain. The FIR filter which special frequency response to match the continuous spectrum feature of the noise was designed using window function meth- od, then the continuous spectrum signals was reconstructed in time domain. The reconstruction of warship radiated noise was gained. The simulation result showed that the method could reconstruct warship radiated noise factually. The result can be used in simulation of the hardware-in-the-loop as a signal source.
出处
《舰船电子工程》
2015年第4期86-89,共4页
Ship Electronic Engineering
关键词
特征线谱
FIR滤波器
舰船
噪声重构
feature line spectrum, FIR filter, warship, reconstruction of noise
