基于FEKO隐身飞机目标动态角闪烁特性实时仿真

Analysis of Stealth Aircraft Target's Dynamic Angular Glint Characteristics Based on FEKO

角闪烁是现代防空制导武器的主要误差源。针对隐身飞机目标动态角闪烁外场测量难度大、耗时长、精度低的问题,提出了一种基于FEKO软件的雷达目标动态角闪烁特性的实时仿真方法。首先,对雷达坐标系和目标坐标系进行了坐标转换,获得了目标模型飞行随时间变化的方位角和俯仰角;然后,介绍了利用FEKO仿真计算目标动态角闪烁的方法及其步骤;最后,以隐身飞机目标为例,通过该方法仿真获得蛇形机动下的目标实时动态角闪烁特性。仿真结果表明:该方法能获得目标实时电场散射信息,进而计算出目标的角闪烁信息。该研究为防空制导武器抗诱偏、降低脱靶量等方面提供了理论分析和实验依据。

Angular glint is main error source of the modern air defense guided weapon. The field measurement of dynamic glint of stealth aircraft takes long time and has the problem of low accuracy. Thus,a real-time approach based on FEKO to simulate the characteristics of dynamic glint of radar targets is proposed. Firstly,the azimuth and pitch angle of the target model during flying,which changes over time,are obtained by the coordinate transformation of radar coordinate system and target coordinate system.Then,the method and steps of calculating dynamic glint of the target are introduced through FEKO simulation. Finally,one kind of stealth aircraft target is taken as example. The real-time characteristics of dynamic glint of radar target in snake maneuver are achieved by simulation. The conclusion can be obtained through simulation that the approach can be used to get the information of real-time electric field of the target,furthermore,the angular glint can be calculated. The study provides the analysis for theory and the basis for experiments,which help improve the anti-deception of air-defense weapon and reduce the miss distance.