CAJ | 학술논문

该文针对弹道导弹防御系统的目标识别问题，研究了中段目标的2维几何特征反演方法。基于中段目标的外形特征，提出了一种描述目标2维几何结构的稳定特征量，该特征量不受目标姿态变化和雷达工作条件的影响。基于中段目标的电磁散射特性，建立了目标在不同姿态下的ISAR成像结果与目标2维几何特征的映射关系，进而提出一种基于ISAR像的中段目标2维几何特征反演方法，能够稳定地反演出中段目标飞行过程中所有姿态下的2维几何特征。通过电磁计算数据和暗室测量数据验证了所提方法的有效性和稳定性。
해문침대탄도도탄방어계통적목표식별문제，연구료중단목표적2유궤하특정반연방법。기우중단목표적외형특정，제출료일충묘술목표2유궤하결구적은정특정량，해특정량불수목표자태변화화뢰체공작조건적영향。기우중단목표적전자산사특성，건립료목표재불동자태하적ISAR성상결과여목표2유궤하특정적영사관계，진이제출일충기우ISAR상적중단목표2유궤하특정반연방법，능구은정지반연출중단목표비행과정중소유자태하적2유궤하특정。통과전자계산수거화암실측량수거험증료소제방법적유효성화은정성。
This paper focuses on Two Dimensional (2D) geometric feature inversion method of midcourse targets, serving for the target recognition problem of ballistic missile defense system. Based on the figuration characteristic of midcourse targets, a stable characteristic quantity, which describes the 2D geometric configuration of target, is proposed. The characteristic quantity is independent on the target attitude variation and radar work condition. Then the expression form of 2D geometric feature in radar image is analyzed with respect to different intervals, the mapping relationships between ISAR images under various target attitudes and the 2D geometric feature of target are established, and an 2D geometric feature inversion method for midcourse targets based on ISAR image is proposed. The proposed method can stably estimate the 2D geometric feature of midcourse targets under all attitudes during the midcourse flight, which is verified by the simulation experiments with electromagnetic computed data and measured data in anechoic chamber.