动目标雷达散射截面的建模研究  

A Study on Modeling of Moving Target's Radar Cross Section

作　　者：张晨新[1] 庄亚强[1] 张小宽[1] 林存坤 王大朋[1] 

机构地区：[1]空军工程大学防空反导学院,西安710051

出　　处：《现代雷达》2014年第12期66-69,74,共5页Modern Radar

基　　金：国家自然科学基金资助项目(61372166)

摘　　要：针对目标运动过程中的姿态扰动对动态雷达散射截面(RCS)的影响,提出了一种新的动目标RCS仿真方法。首先,对目标进行精确几何建模,并计算了目标局部空域的静态RCS数据;然后,根据航迹解算了雷达视线角信息,基于线性插值法获得了动态RCS的初步仿真值,采用正态分布的随机数修正了动态RCS的初步仿真值;最后,比较了实测结果和仿真结果的起伏统计特性。结果表明:仿真修正值与实测值的幅度起伏特性吻合得相当好,从而验证了所提出的动态RCS仿真方法的准确性。研究成果可为雷达系统仿真提供精确回波模拟。To account for the attitude disturbance＇s influence on RCS of moving target, a novel simulation method of dynamic RCS is proposed. Firstly, the target model is modeled, and the partial space static RCS database is built. Then, the aspect angles of line of sight are resolved based on flight path. Therefore, the simulated dynamic RCS series of predestined path is obtained by line- ar interpolation method. In addition, the simulated dynamic RCS was modified by a normal distribution random series. The statisti- cal analysis of simulated and measm＇ed dynamic RCS is investigated. The excellent agreement in statistical characteristic between modified simulated RCS and measured RCS shows that this simulation approach is practicable. Simultaneity, the application of this simulation method is verified. The research result can provide accurate echo data to radar system simulation.

关 键 词：雷达目标 雷达散射截面 姿态扰动 统计建模 

分 类 号：TN958[电子电信—信号与信息处理]