雷达群目标跟踪条件下的弹道预报方法

Trajectory prediction method under the condition of radar cluster targets tracking

弹道导弹在突防时表现为弹头、诱饵等群目标特征。雷达对群目标进行跟踪时,如果某一目标出现丢失,为维持航迹,常利用弹道导弹运动轨迹可预测的特点进行弹道预报。预报的精度主要取决于初值精度。考虑到雷达对群内多目标探测信息具有相关性,多目标之间的相对误差一般小于单个目标的绝对误差。利用这一误差特性,在群目标间不发生机动运动情况下,提出了利用群内目标间的相对运动关系,用雷达正在跟踪的目标对其他丢失目标进行弹道预报的方法。通过误差分析,定量研究了利用群内目标的相对运动关系提高弹道预报精度的机理。仿真表明,当雷达对群目标探测信息相关性较好时,该方法大幅提高了弹道预报精度。

When radar is tracking cluster ballistic missile targets which include warhead,decoys,etc.if an important radar tracking is lost,trajectory prediction is often carried out to maintain the track.The accuracy of the prediction depends on the accuracy of the initial accuracy.The relative error between multiple targets is generally less than the absolute error of a single target.To take advantage of this feature,this paper presents a prediction method to maintain the lost track,based on the relative motion relation among ballistic targets.The restrictive condition is that the cluster targets do not maneuver between each other.Through error analysis,the mechanism of improving the accuracy of trajectory prediction is studied quantitatively.Simulation results show that the accuracy of trajectory prediction is greatly improved,while the radar has good correlation with multitarget detection information.