机动目标角闪烁对制导精度影响仿真研究

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Simulink仿真回路的目标角闪烁特性的动态仿真方法.借助商业电磁仿真软件FEKO获取目标动态散射特性,并按实际问题的物理意义构建寻的制导系统模型.最后,通过仿真获得目标俯冲机动条件下角闪烁对制导精度的影响.仿真结果表明:该方法能获得目标动态电场散射信息,进而计算出目标的角闪烁信息.目标采用超低空大角度俯冲机动会有效改善突防效果,增大制导误差.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.

Simulation Study on Influences of Target's Dynamic Angular Glint on Guidance Accuracy

Angular glint is the main error source of modern air defense guided weapons.The field measurement of dynamic glint has the problems of long time and low accuracy.Thus,a real-time simulation method is proposed.Firstly,the dynamic scattering characteristics of target are obtained by FEKO simulation.Then,the model of homing-guidance system is established according to the physical meaning of practical problems.Finally,the effect of angular glint on guidance accuracy under the condition of diving maneuver can be found by simulation.The conclusion is that the approach can be used to get the scattering information of dynamic electric field of the target,furthermore,the angular glint can be calculated.When the target dives with high angle at low altitude,penetration can be improved effectively,and guidance error is increased as well.The study can provide the theoretical analysis and experimental foundations for the anti-deception of the air defense guided weapon and the reduction of miss distance.