中段翻滚目标运动建模及其宽带雷达回波仿真

Motion modeling and wideband radar echo simulation for midcourse rolling target

摘要:

弹道导弹飞行经历中段时，弹头与诱饵的主要差异是运动方式的不同，而诱饵大都呈现翻滚运动方式。文章从中段翻滚目标的物理、运动和散射特性出发建立了中段翻滚目标的运动模型，推导出了宽带线性调频(LFM)雷达回波的数学表达式。然后对中段翻滚目标的宽带雷达回波进行了仿真，并利用目标径向尺寸的周期变化估计出目标的翻滚周期。仿真结果表明中段翻滚目标宽带雷达回波与目标的姿态运动参数、形体参数都有较大关系，这将为中段目标的识别提供基础。

Abstract:

The main differences between warhead and bait are their movement ways in the midcourse of ballistic missiles，and rolling motion is the major way for bait. The motion model was established based on physical，movement and scattering characteristics of midcourse rolling targets，and the mathematical expression of the wideband Linear Frequency Modulation(LFM) radar echo was deduced．Then wideband radar echoes were simulated and rolling period was estimated based on the changes of target radial length．The simulation results indicate that the wideband radar echoes of midcourse rolling targets have something to do with the target attitude motion parameters and the physique parameters，which will provide an important basis for midcourse target identification.