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针对高超飞行器在飞行过程中产生的高速流场光学传输效应对星图的影响,运用雷诺平均法对飞行器边界湍流流场参数进行了计算,采用光线追迹法计算了星光在高速流场中的传输路径,应用物理光学法计算得到时间平均流场的光学传递函数,最后对气动光学效应退化星图进行了模拟。仿真结果表明,时间平均流场使得星光传输发生偏移和模糊,导致畸变星图中星点变得模糊,质心发生偏移,影响星图匹配的成功率。
Aiming at the influence of the optical transmission effect of the high-speed flow field produced by the flying over the aircraft on the star map, the parameters of the turbulent flow field at the boundary of the aircraft are calculated by Rayleigh average method. The ray tracing method is used to calculate the star- The optical transfer function of time-averaged flow field was calculated by using physical optics method. Finally, the aerodynamic optical degradation degeneration star map was simulated. The simulation results show that the time-averaged flow field causes the starlight transmission to be offset and blurred, resulting in the star point becoming distorted and the center of mass shifting in the distorted star image, which affects the success rate of star image matching.