文章摘要
王晓峰,王炳和,相敬林.一种估计船舶线谱的联合分析法[J].声学技术,2004,(1):1~3
一种估计船舶线谱的联合分析法
A united method of estimating line spectrum of ship-radiated noise
投稿时间:2003-07-03  修订日期:2003-11-24
DOI:
中文关键词: 船舶辐射噪声  谱估计  线谱  联合分析法
英文关键词: ship-radiated noise (SRN)  spectrum estimation  line spectrum  unified analysis method
基金项目:国防科技“十五”重点预研项目(41303080301)
作者单位
王晓峰 武警工程学院通信工程系, 西安, 710086 
王炳和 武警工程学院通信工程系, 西安, 710086 
相敬林 西北工业大学航海工程学院, 西安, 710072 
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中文摘要:
      线谱是船舶辐射噪声中重要的特征信息,线谱提取是水中目标识别的关键技术。文章简述了船舶辐射噪声的物理成因和频谱特征,利用经典谱估计法与现代谱估计法在短时序列谱估计中的特点,结合Matlab仿真试验的结果,提出了一种对船舶辐射噪声0100Hz低频段线谱估计的联合分析法。并用该方法对两艘实船噪声进行了谱分析,提取了A型船在中速航行时5.25Hz的特征线谱,B型船存在65.5Hz和69.2Hz两条特征线谱。实验结果表明该方法对低频段的线谱特征提取有明显的实用效果。
英文摘要:
      Line spectra provide significant information in ship-radiated noise. Extracting spectral lines from ship-radiated noise is a key technique in identification of underwater targets. In this paper the physical causes and spectral characteristics of ship-radiated noise are first briefly introduced. Based on simulation of line spectral estimation with MATLAB, a unified analysis method is provided to estimate the spectral lines in ship-radiated noise ranging from DC to 100Hz using the periodographic method and modern spectrum estimation method for short-time series. The ship-radiated noise signals from two ships are analyzed by using the proposed method. A characteristic spectral line at 5.25Hz is found from a ship of type A moving at a medium speed, and characteristic spectral lines at 65.5Hz and 69.2Hz respectively are found from a ship of type B. The results show that the described method is effective in extracting spectral lines from ship-radiated noise.
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