飞行器目标推进系统声信号特征提取研究  

Research on Extraction of Acoustic Characteristics of Aircraft Targets' Propulsion System

作　　者：陈赟[1] 冯顺山[1] 冯源[1] 

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081

出　　处：《北京理工大学学报》2010年第11期1326-1330,共5页Transactions of Beijing Institute of Technology

摘　　要：为了提取低空来袭的飞行器目标推进系统声信号的特征,分析了典型飞行器目标推进系统辐射噪声的信号特性,并建立了其推进系统辐射噪声的数学模型及被动声预警系统的接收信号模型.进而提出了基于Radon变换的LOFAR谱图线谱提取算法,以获取飞行器的推进器转速特征.通过对实测飞行器噪声数据的分析,验证了信号模型算法的合理性.For the short-range defensive weapons, extracting the acoustic characteristic of attacking aircraft at low altitude is an effective way to detect and recognize the target. Firstly, the signal characteristics of radiation noise of the typical vehicle propulsion system are analyzed, thus the mathematical model of propulsion system noise and the receiving signal model of passive acoustic early-warning system are given. Furthermore, the Radon transformation based LOFAR spectrogram extraction algorithm is proposed to obtain the rotation speed characteristics of the aircraft＇s propulsion system. Finally, the feasibility of the proposed algorithm is validated by analyzing the result of the measured aircraft noise.

关 键 词：近程防卫武器 推进系统噪声 低频频率分析记录 线谱特征提取 

分 类 号：TN911.72[电子电信—通信与信息系统] TJ431.1[电子电信—信息与通信工程]