考虑高斯能量分布的复杂表面航天器激光雷达散射特性分析  

Analysis on Lidar Scattering Characteristics of Spacecraft with Complex Surface Considering Gaussian Energy Distribution

作　　者：程勋龙 康国华 邱钰桓 武俊峰 吴佳奇 尹一蓁 CHENG Xunong;KANG Guohua;QIU Yuhuan;WU Junfeng;WU Jiaqi;YIN Yizhen(College of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 211101,China)

机构地区：[1]南京航空航天大学航天学院,江苏南京211101

出　　处：《上海航天（中英文）》2024年第1期57-65,共9页Aerospace Shanghai（Chinese&English）

基　　金：江苏省双创人才项目(JSSCBS20210181);国家自然科学基金面上项目(12272168)。

摘　　要：针对复杂表面航天器在激光雷达照射下散射特性模拟不准的问题,通过表面建模和激光特性修正进行了解决。该方法首先通过高斯能量分布法对激光光束模型进行修正;然后基于有限元的思想,针对航天器复杂表面非光滑、非连续以及多材质等特性,利用改进Z-buffer的消隐算法解决了复杂航天器表面建模问题;最后建立了面向激光雷达的复杂表面航天器激光雷达散射截面的计算方法。仿真分析表明:航天器不同姿态下的激光雷达散射截面精度提升了14 58%,为后续面向激光雷达的隐身设计奠定了基础。In view of the problem of inaccurate scattering simulation of complex surface spacecraft under laser radar illumination,a solution through surface modeling and laser characteristics correction is proposed First,the Gaussian energy distribution method is used to modify the laser beam model Then,the challenge of complex surface modeling for spacecraft is tackled by means of the improved Z-buffer hidden surface removal algorithm based on the finite element method,considering the complex surface characteristics such as non-smoothness,discontinuity,and multiple materials Finally,a calculation method for the laser radar cross section of complex surface spacecraft is developed The simulation analysis indicates that the accuracy of the laser radar cross section under different spacecraft attitudes is improved by 14 58%,which lays a foundation for the subsequent stealth design targeted at laser radar systems.

关 键 词：激光隐身 激光散射特性 激光雷达(Lidar)建模 Z缓冲技术 高斯能量分布 

分 类 号：V418[航空宇航科学与技术—航空宇航推进理论与工程]