RCS study of moving radar targets
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摘要: 运动目标相对雷达姿态角的获得是动目标雷达散射截面(RCS,Radar Cross Section)研究中的重要内容.详细阐述了动目标姿态角的定义和计算方法,以及与静止目标姿态角的区别和联系.飞行器飞行中受气流的影响,会产生各种随机抖动,将影响动目标的RCS.利用准静态的方法分析运动物体的散射,在高频条件下,RCS主要来自面元散射、边缘散射和角反射器散射等.利用一种抖动模型,详细分析了抖动对动目标RCS的影响.仿真结果表明:随着频率的增加,抖动对RCS的偏离度增加;在不同姿态下抖动对目标的RCS的影响程度不同, 在某些姿态角下影响非常大.Abstract: Obtaining the angles between the moving target and the radar is very important in the study of radar cross section(RCS) of moving targets. The angles between the moving target and the radar were defined and calculated in detail. The differences and relationship of angles from static targets and moving targets were also discussed. The method of quasi-static was used to analyze the scattering from moving target. In high frequency approximate, RCS comes from the contributions of face scatter, edge scatter and corner reflector, ect. Because of the influence of airflow, the aircraft will be tremored in random. A kind of tremor model was used to analyze the effect of tremor on RCS. It indicates that the deviate degree of RCS increases with the frequency, the effect from tremor on RCS is different at different angles,and it is tremendous in certain angles.
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Key words:
- radar cross section /
- moving /
- tremor
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