一种改进的延时转发弹道假目标生成方法

A Generation Method of Realistic Ballistic False Target Based on Perspective Projection

基于延时转发的干扰体制,设计了一种新的运用于弹道导弹自由段的有源假目标干扰方法,能够生成运动轨迹近似真实导弹的假目标。首先,建立了弹道导弹自由段运动模型,构建虚拟弹道平面,采用透视投影的方法,通过求解二次锥面与平面交线的几何问题生成逼真的假目标轨道;其次,推导了假目标弹道的时延函数,讨论了实际情况下数字射频存储器(DRFM)在转发信号时其步进间隔与步进长度的约束条件,在理想时延函数非线性的情况下,对DRFM阶梯状时延函数进行了设计;最后,通过情景模拟与仿真试验论证了该设计的有效性。

An active decoy interference method is presented in this paper. It is applied to the coast flight of ballistic missile based on time-delay retransmission interference system and can form false target with the same trajectory as real target. First- ly, the motion model of the coast flight trajectory of ballistic missile and virtual ballistic plane are built, and the false target trajectory generation is formed by solving a geometry problem of quadric cone and plane intersection with perspective projec- tion method; Then, the time-delay function of ballistic false target is deduced, the constraint condition of digital radio fre- quency memory （ DRFM ） step interval and step length in actual circumstances of retransmission is discussed, and the stepped- delay function of DRFM is designed when the ideal delay function is nonlinearity ; Finally, this design method is proved effec- tive though simulation and analysis.