舰船辐射噪声连续谱特征提取方法研究

Continuous spectrum feature extraction methods of warship radiated noise

为了进一步提高对舰船自身属性的认识,并且为舰船的自我监测提供有效依据,针对连续谱的1/3oct谱特征提取方法展开研究。在详细分析舰船辐射噪声连续谱成因的基础上,介绍了已有宽带连续谱特征提取方法,分析其优缺点,并对其进行改进,提出了新的特征提取方法。通过实例对各连续谱特征提取方法进行对比分析,实验证明了提出的方法的有效性,得到了当拟合系数为7时的曲线拟合方法结果最佳的结论。

For increasingly realizing the warship self-property and providing effective foundation for warship self-test,feature extraction methods of 1/3oct spectrum is mostly studied in the paper.Based on detailed analysis of warship radiated noise continuous spectrum origin,it introduces the existent feature extraction methods,analyzes these methods＇ merits and drawbacks.And then the feature extraction methods are improved.The new methods are created in the paper.At last these feature extraction methods are contrastingly analyzed by experiment,which proves that the new methods are effective,and obtain the best method,which is curve fitting method when fitting coefficient is seven.