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为了减小偏流角对空间相机图像质量的影响,延长相机一次性有效连续摄像时间,提出了一种在相机摄像前的准备阶段,偏流角的周期性连续调整方法。首先,详细分析偏流角调整的需求,确定调整策略;然后,介绍了偏流角调整系统的构成及工作原理;最后,系统设计和实验验证。实验结果表明:单次调整误差≤40″,调整周期为512ms,摄像开始时偏流角≤56″,对图像MTF值的影响≤0.03%,一次性有效连续摄像时间最大可延长9.488s。有效减少了偏流角对图像质量的影响,延长了有效摄像时间,完全满足空间相机对偏流角的控制要求。
In order to reduce the impact of the drift angle on the image quality of the space camera and to prolong the camera’s effective and continuous shooting time, a method of periodically adjusting the drift angle was proposed in the preparation stage before the camera was taken. First of all, the demand for adjustment of drift angle is analyzed in detail and the adjustment strategy is determined. Then, the composition and working principle of drift angle adjustment system are introduced. Finally, the system design and experimental verification are carried out. The experimental results show that the error of single adjustment ≤40 “, the adjustment period of 512ms, the drift angle≤56” at the beginning of the imaging, the influence on the MTF value of the image is less than or equal to 0.03%, and the one - time effective continuous imaging time can be extended by 9.488s. Effectively reducing the impact of the drift angle on the image quality, extending the effective camera time, and fully meeting the control requirements of the space camera for the drift angle.