远程预警相控阵雷达在探测临近空间升力式再入飞行器时受到地平线限制,当雷达在远端发现目标后,飞行器由于纵向跳跃和侧向偏移可能机动至雷达水平波束屏以下,从而造成情报中断.为了维持情报连续,提出了一种基于目标三自由度弹道方程的跳跃空域预测方法,以辅助预警系统补盲照射.首先,将穿屏过程中的量测信息通过坐标变换转换到对应坐标系,得到目标飞离地平线的运动参数初值;然后,根据这些量测信息估算目标飞离地平线时的控制量,并对其进行预测,基于数值仿真获得了目标可能的跳跃点空间分布;最后,通过仿真验证了该方法的有效性.%The long-range early warning phased array radar is limited by the horizon when detecting nearspace lifting-reentry vehicle. After the discovery at the far end, the vehicle may maneuver to below the radar horizontal beam screen and cause the intelligence to be interrupted due to longitudinal jump and lateral shift. A method for jumping airspace prediction is put forward based on the three-degree-of-freedom ballistic equation, in the propose of indicating early warning system to rediscover the target. The mea-surement information which obtained in the process of crossing the screen is converted to the corresponding coordinate system by coordinate transformation, the initial values of motion parameters when the target flying away from the horizon are obtained. Then, the control quantities of the target are estimated and predicted. Based on those, the spatial distribution of possible jump points of the target is obtained by simulation. Finally, the validity of the algorithm is verified by simulation.
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