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为了研究时变湍流对跟瞄过程中动态平移的光斑定位和跟踪精度的影响,采用改进的逆傅里叶变换方法构造了体现大气湍流特性的随机相位屏,模拟仿真分析了不同强度时变湍流影响下光斑动态平移时探测器感受到的光斑质心与光斑实际质心之间的跟踪偏差、定位偏差与光斑在探测器上位置之间的关系,以及湍流强度对光斑质心定位精度的影响,给出了统计偏差曲线。结果表明,在时变大气湍流的影响下,光斑整体动态平移过程中实际质心的移动距离与接收端探测器感受到的光斑质心移动距离存在一个跟大气湍流强度成正比的偏差。动态平移过程中光斑质心的平移跟踪偏差与定位精度、大气湍流强度以及光斑在接收终端探测器上的位置有关。
In order to study the effect of time-varying turbulence on the spot location and tracking accuracy of dynamic translation in the process of aiming and tracking, a stochastic phase screen reflecting atmospheric turbulence was constructed by using the improved inverse Fourier transform method. The simulation results of time-varying turbulence The influence of the tracking error between the spot center of mass and the actual centroid of the spot, the relationship between the position deviation and the position of the spot on the detector and the influence of the turbulence intensity on the spot centroid positioning accuracy are affected by the influence of the spot dynamic translation. Statistical deviation curve. The results show that under the influence of time-varying atmospheric turbulence, there is a deviation proportional to the intensity of atmospheric turbulence due to the fact that the moving distance of the actual centroid and the moving distance of the centroid of the spot detected by the detector at the receiving end are in direct proportion to the atmospheric turbulence intensity. The translational tracking deviation of the centroid of the light spot during dynamic translation is related to the positioning accuracy, the intensity of the atmospheric turbulence and the position of the light spot on the receiving terminal detector.