基于DEMON线谱的轴频提取方法研究  

Extraction of shaft frequency based on the DEMON line spectrum

作　　者：殷敬伟[1] 惠俊英[1] 姚直象[2] 杨春[1] 

机构地区：[1]哈尔滨工程大学水声工程学院,哈尔滨150001 [2]海军工程大学信息与电气工程学院,武汉430033

出　　处：《应用声学》2005年第6期369-374,共6页Journal of Applied Acoustics

摘　　要：目标的螺旋桨不同则轴频不相同。轴频是目标的特征之一,可以应用于目标识别当中。本文提出一种改进的高频噪声解调分析(DEMON)方法,能够得到具有明显线谱的DEMON谱;提出最大公约数算法,并给出提取轴频的具体步骤。海试数据实验结果验证了本文所提方法及算法的有效性和可行性。Different propeller has different shaft frequency. Shaft frequency is one character of the target which can be applied to underwater targets identification. In this paper, a method to improve the DEMON spectrum estimation is proposed and by which we can get a DEMON spectrum which has only distinct line-spectrums. We then present the largest common divisor algorithm and give the process of extracting shaft frequency. The result of sea experiment shows that the method and the algorithm proposed are effective and feasible.

关 键 词：水下目标识别 DEMON分析 轴频提取 最大公约数算法 DEMON 提取方法 轴频 线谱 最大公约数 目标识别 

分 类 号：TP309[自动化与计算机技术—计算机系统结构] U666.7[自动化与计算机技术—计算机科学与技术]