摘要
在海面目标的声纳探测优化的研究中,由于回波信号受随机界面的干扰影响,主动声纳探测海面目标比较困难。由于传统的解析方法求解回波的过程复杂,根据存在界面时声散射的Kirchhoff近似公式,建立了一种海面目标的声散射模型,导出了目标回波特性的预报公式,并仿真分析了入射波频率和掠射角变化对海面目标回波的影响。结果表明:海面附加回波对直达目标的镜反射波造成不同程度的干扰,合理调整声波掠射角有利于目标探测和特征识别,并对提高声纳探测海面目标的准确性提供了科学依据。
Because echo signals are disturbed by random interface,it is difficult for active sonar to detect sea surface target.In view of the problem of complicated process of calculation by analytical ways,based on the Kirchhoff equation which applied in the acoustic scattering on condition of existing interface,a model of acoustic scattering for sea surface target is set up,the predicting equation of echo＇s characteristics is derived,and the influence caused by the changes of incident frequency and grazing angle is analyzed.The results of simulation indicate that the additional surface echo disturbs the direct mirror reflection.It is useful for active sonar to detect and identify the surface target by adjust grazing angle reasonably.
出处
《计算机仿真》
CSCD
北大核心
2016年第5期1-5,共5页
Computer Simulation
关键词
回波
声散射
掠射角
Echoes
Acoustic scattering
Grazing angle
