弹道中段动态目标回波仿真研究

Simulation Research on Echo of Dynamic Ballistic Midcourse Target

弹道中段目标识别是当前国防安全研究的热点,尤其是如何获取能够反映目标特性的回波数据的问题。现有的目标回波数据获取方法成本高,计算量大且不能反映复杂目标回波特性。针对此问题,提出了一种新的中段动态目标回波仿真方法。方法首先研究了弹道中段目标运动模型,在分析不同目标中段运动特性的基础上,推导出了进动目标和翻滚目标相对雷达的姿态角的变化规律。然后利用电磁计算软件计算目标全姿态角回波数据,结合动态目标的雷达-目标姿态角从全姿态角数据中提取动态回波数据。为了获取宽带回波,结合步进调频理论,对动态数据进行逆傅里叶变换。实验表明,新法能够获得反映目标运动特性的回波数据,为目标识别提供有力支撑。

Ballistic midcourse targets recognition is a hotspot in national security research, and how to obtain the echo data which can reflect the characteristics of the target is always a question of the first importance. In the paper, a simulation method for obtaining dynamic radar echo data was proposed. First ,this method was used to research the movement models of ballistic mideourse target and deduce the change of posture angle of precessional target and roll- ing target in proper sequence after analysing the motion characteristics. Then we calculated full posture angle radar echo data of ballistic target taking the advantage of FEKO, and calculated dynamic datas with dynamic radar - target posture angle. Simulation results show that this method can obtain dynamic echo data which reflect the motion charac- teristic well.