典型车辆目标声信号产生机理与特性分析

Analysis of Acoustic Signal Generation Mechanism and Characteristics for Typical Vehicles

声信号特性是重要的目标特性,对车辆声信号特性的分析是其对抗现代声侦察探测和打击的重要基础。本文采用理论分析和实测相结合的方法,分析典型车辆目标的声学特性,为对抗采用被动声探测技术的侦察和打击手段提供理论和数据支撑。结果表明:轮式车辆和履带式车辆声能量主要集中在400Hz以下的低频范围,车辆声信号频谱包括比较清晰的谐频成分,随着车辆接近传感器,信号高频部分的谐频成分逐渐增多。谐频成分的分布规律是区别不同车辆类型的重要特征。

This study aims to provide theoretical and data support for countering the reconnaissance and attack means using passive acoustic detection technology based on analysis of the acoustic characteristics of typical vehicle targets using theoretical analysis and measured data.The results shows that the acoustic energy of wheeled vehicles and tracked vehicles is mainly concentrated in the low frequency range below 400Hz,and the acoustic signal spectrum of vehicles includes relatively clear harmonic components.As the vehicle approaches the sensor,the harmonic components of the high frequency part of the signal gradually increase.The distribution of harmonic components is an important feature to distinguish different vehicle types.Acoustic signal characteristics are important target characteristics,and the analysis of vehicle acoustic signal characteristics is an important basis for its resistance to modern acoustic reconnaissance and attack.