文章摘要
向辉平,罗建,傅瑞锦.舰船宽带连续谱噪声的模拟[J].声学技术,2005,(3):140~143
舰船宽带连续谱噪声的模拟
Simulation of broadband ship noise with continuous spectrum
投稿时间:2004-05-25  修订日期:2004-07-11
DOI:
中文关键词: 舰船辐射噪声  自适应滤波器  宽带连续谱噪声
英文关键词: ship's radiation  adaptive filter  broadband noise  continuous spectrum
基金项目:西北工业大学‘英才培养计划'基金项目
作者单位
向辉平 西北工业大学航海学院, 西安, 710072 
罗建 西北工业大学航海学院, 西安, 710072 
傅瑞锦 西北工业大学航海学院, 西安, 710072 
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中文摘要:
      首先对舰船辐射噪声信号的时域特性和频域特性进行了分析讨论,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。由于舰船宽带信号的连续谱在高频段具有-6dB/oct的衰减特性,因此该FIR滤波器的幅频响应也要与此一致,且为线性相位,即该滤波器的频率响应要具有特定的形状。采用了自适应方法很方便地实现了该特定频率响应FIR滤波器的设计,再将高斯白噪声信号通过该滤波器即实现宽带噪声信号的模拟。仿真结果表明,该方法较真实地模拟出任意给定频域特征的宽带连续谱噪声信号。
英文摘要:
      The time,domain and frequency,domain features of ship radiation noise are analyzed. According to the frequency,domain feature of the noise with continuous spectrum, simulation of the broadband noise with white noise and an FIR filter is presented. Base on the theory of linear systems,the FIR filter should possess a specific frequency response to match the required spectrum of ship radiation. A special frequency response FIR is designed using an adaptive method. The ship's broadband continuous was obtained using such a simulation system, showing that the method is effective.
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