大尺寸焦平面空间相机调焦机构的精度分析  

Accuracy analysis of focusing mechanism in space camera with long-focal-plane

作　　者：王书新[1,2] 李景林[1] 刘磊[1] 齐光[1,2] 任建岳[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院研究生院,北京100039

出　　处：《光学精密工程》2010年第10期2239-2243,共5页Optics and Precision Engineering

基　　金：国家863高技术研究发展计划资助项目(No.86325113B)

摘　　要：由于大尺寸焦平面空间相机调焦机构的焦平面两端存在的不可消除的同步运动误差会直接影响相机调焦精度,因此对焦平面两端同步运动精度进行了分析。首先,研究了大尺寸焦平面空间相机调焦机构的特点,提出了焦平面两端同步运动误差是影响其调焦精度的主要因素;其次,分析了影响同步运动精度的主要误差来源,建立了同步运动误差的数学模型,并采用蒙特卡罗仿真算法对数学模型进行了仿真分析;最后,通过测试焦平面两端同步运动精度对仿真结果进行了验证。仿真结果显示,同步运动精度为0.02 mm,与试验数据分析结果0.023 mm一致,说明此方法能够比较准确地确定焦平面两端同步运动精度,为后续在轨调焦策略的确定以及同类产品的研制提供技术支持。The synchronous motion accuracy at both ends of focal plane of a focusing mechanism in a space camera was analyzed, for it was difficult to be eliminated and would affect on the focusing accuracy of the camera directly. The characteristics of the focusing mechanism of the camera with a long focal plane were researched, then it pointed out that the synchronous motion error at both ends of focal plane is the major factor that effects on the focusing accuracy of the camera. By analyzing main error sources of synchronous motion error, Method was used to simulate the error mod verify the validity of the simulation result. a el. Si mathematical model was established, and Finally, the synchronous motion accuracy mulation results indicate that synchronous Monte Carlo was tested to motion accuracy is 0. 02 mm,which is coincident with the test data well. It is concluded that the method can estimate accurately the synchronous motion accuracy, and can support the determination of focusing strategy on orbit.

关 键 词：空间相机 大尺寸焦平面 调焦机构 精度分析 蒙特卡罗算法 

分 类 号：V475.3[航空宇航科学与技术—飞行器设计]