Numerical study on aero-optical imaging deviations of vehicles at different altitudes  

作　　者：XU Liang ZHANG Ziye WANG Tao WU Jianhui CHEN Xi 

机构地区：[1]Tianjin Key Laboratory for Control Theory and Applications in Complicated Systems,School of Electrical Engineering and Automation,Tianjin University of Technology,Tianjin 300384,China [2]School of Intelligent Systems Engineering,Sun Yat-sen University,Guangzhou 510006,China [3]China Academy of Launch Vehicle Technology,Beijing 100076,China

出　　处：《Optoelectronics Letters》2022年第2期97-102,共6页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.61975151 and 61308120);the Big Data Research Foundation of PICC(No.201900418CI000008).

摘　　要：When the vehicle is flying in the atmosphere at high speed, the optical head and the atmosphere will have severe friction, thus forming a complex flow field, which makes the target image shift in the optical imaging system. The influence of altitude on aero-optical imaging deviation is studied in this paper. The geometric modeling and mesh generation of a typical blunt nosed high-speed vehicle were carried out, and the three-dimensional(3 D) flow field density was obtained by a large amount of computational fluid dynamic calculation. In order to complete the optical calculation, the backward ray tracing method and the backward ray tracing stop criterion were used. The results show that as the height increases, the imaging deviation decreases gradually, and the imaging deviation slope increases and tends to be flat and close to zero.

关 键 词：CALCULATION deviation BACKWARD 

分 类 号：V248[航空宇航科学与技术—飞行器设计]