摘要
通过分析水下目标辐射噪声的来源及各噪声源的谱特性,提出了用连续谱噪声叠加线谱噪声仿真水下目标辐射噪声的方法。根据水下目标辐射噪声的连续谱和线谱的功率谱特征,先后建立了连续谱和线谱模型。连续谱是由高斯白噪声先后通过低通滤波器和LMS(Least Mean Square)自适应FIR滤波器处理后得到;线谱可通过叠加一组谐波分量获得。在Matlab/Simulink环境下仿真水下目标辐射噪声模型。仿真结果表明,该方法能够较为真实地仿真水下目标辐射噪声,且具有较强的灵活性和实用性。
By analyzing the sources of radiated noise of underwater target and its components＇ spectral characteristics, the method that the radiated noise spectrum of underwater target can be simulated by continuous spectrum superimposed line spectrum modulation spectrum is put forward. According to the power spectral characteristics of continuous spectrum and line spectrum of the radiated noise from underwater target, established continuous spectrum and line spectrum model, respective- ly. Continuous spectrum is obtained from a Gaussian white noise has processed by a low-pass filter and LMS （ Least Mean Square） adaptive FIR filter. While line spectrum obtained by superimposing a harmonic component. The simulation result of underwater target＇ s radiated noise model in Matlab/Simulink environment shows that this method can be more realistically simulate underwater target＇ s radiated noise, and is more flexibility and practicality.
出处
《电声技术》
2015年第3期69-72,共4页
Audio Engineering
关键词
辐射噪声
功率谱
自适应FIR滤波器
radiated noise
power spectrum
LMS, adaptive FIR filter
Matlab/Simulink
