
高速飞行器气动光学传输效应的工程计算方法
殷兴良
An Engineering Method to Calculate Transmitting Effect of Aero-optics for Hypersonic Interceptor
Yin Xingliang
气动光学传输效应对飞行器光学成像探测系统的性能有着十分重要的影响,它使探测器接受的图像产生偏移、抖动和模糊。文章分析了目标光线通过流场时的光学传输特性,建立了流场光学传输特性的工程计算模型,描述了气动光学传输效应对成像探测系统影响的经验模型。在此基础上,对气动光学传输效应产生的像偏移、抖动和模糊进行了数值仿真,仿真结果表明,气动光学传输效应对成像探测系统的影响与飞行器的飞行参数、成像探测系统参数和探测器积分时间等密切相关。
Transmitting effects of aero-optics is very important to optical imaging probing system of interceptor, as it may cause displacement, jitter and blurring of image to receive for the system. The optic transmitting characteristics is analyzed when target ray goes though turbulence flow. The engineering model for optical transmitting characteristics of flow is built up and empirical model for optical imaging system induced by aero-optic transmitting effects is described. The displacement, jitter and blurring are simulated. The numerical simulation results suggest that transmitting effect of aero-optics has powerful influence on the imaging probing system, which is related to flight parameters, imaging system parameters and integration periods of imaging probing system, etc.
空气动力学 / 湍流 / 光学 / 气动光学 / 光学传输效应
aerodynamics / turbulent flows / optics / aero-optics / transmitting effect
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