首页|Numerical study on aero-optical imaging deviations of vehicles at different altitudes
Numerical study on aero-optical imaging deviations of vehicles at different altitudes
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When the vehicle is flying in the atmosphere at high speed,the optical head and the atmosphere will have severe fric-tion,thus forming a complex flow field,which makes the target image shift in the optical imaging system.The influ-ence of altitude on aero-optical imaging deviation is studied in this paper.The geometric modeling and mesh genera-tion of a typical blunt nosed high-speed vehicle were carried out,and the three-dimensional(3D)flow field density was obtained by a large amount of computational fluid dynamic calculation.In order to complete the optical calcula-tion,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.
XU Liang、ZHANG Ziye、WANG Tao、WU Jianhui、CHEN Xi
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Tianjin Key Laboratory for Control Theory and Applications in Complicated Systems,School of Electrical Engi-neering and Automation,Tianjin University of Technology,Tianjin 300384,China
School of Intelligent Systems Engineering,Sun Yat-sen University,Guangzhou 510006,China
China Academy of Launch Vehicle Technology,Beijing 100076,China
国家自然科学基金国家自然科学基金Big Data Research Foundation of PICC
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