为了减小偏流角对空间光学相机成像质量的影响，分析了偏流角对空间光学相机成像质量的影响，对偏流角产生的原因及其像移补偿原理进行了研究。根据某空间光学相机的特点，采用在相机上设计调偏流机构的方法进行偏流角的补偿。通过几种常用的调偏流机构的比较，确定了采用双向丝杆螺母驱动的调偏流方案实现焦平面偏流角的调整。对调偏流机构进行了有限元分析，分析结果表明调偏流机构具有较高的刚度和动态强度。对调偏流机构进行了振动试验，并在试验前后进行调偏流机构精度的闭环检测，检测结果表明调偏流机构精度优于 1′，调偏流机构偏流角调整范围为 +5°~ -5°，满足设计要求，实现了高精度的偏流角补偿。该调偏流机构具有强度高、刚度高、结构紧凑、稳定性好等优点。

In order to reduce the effect of draft on imaging quality of space optical camera, the reason and compensation method of draft are analyzed, and influence of draft on space camera is studied. An adjusting mechanism to compensate draft is designed for a space camera. Bidirectional screw driving is adopted to adjust draft of focal plane of the camera, enabling the draft adjusting mechanism having characteristics high strength and stiffness, compact, and good stability. Finite element analysis shows that the mechanism has high stiffness and dynamic strength. Accuracy of the mechanism are measured by closed-loop method and compared before and after the vibration tests. The results indicates that the accuracy of the mechanism is superior to 1′, and the range of draft adjusting is superior to +5°～-5°, fulfilling the designrequirements and achieving high accuracy of image motion compensation.