面阵彩色航空遥感相机前向像移补偿机构精度分析  

Accuracy analysis of forward image displacement compensation device for aerial scan color CCD camera

作　　者：李延伟[1,2] 远国勤[1,2] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所中科院航空光学成像与测量重点实验室,吉林长春130033 [2]中国科学院大学,北京100039

出　　处：《光学精密工程》2012年第11期2439-2443,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.2007AA701203)

摘　　要：考虑航空遥感相机中前向像移补偿机构的运动精度会直接影响相机分辨率,本文对相移补偿机构的补偿精度进行了分析。首先,研究了面阵彩色航空遥感相机的机械式前向像移补偿机构的特点,给出了对应于曝光时间的前向像移补偿速度残差的许用值;其次,分析了影响像移补偿精度的主要误差来源,建立了速度补偿残差的数学模型,并运用MonteCarlo算法对其进行了仿真分析;最后,通过动态目标发生器成像试验对仿真结果进行验证。试验结果显示,前向像移补偿机构的速度补偿残差3σ为395.6μm/s,与仿真分析结果400μm/s基本一致,说明该精度分析方法可以比较准确地确定前向像移补偿精度。The compensation accuracy of a forward image displacement compensation device in an area scan color CCD camera was alaalyzed, because it would influence the resolution of the camera directly. The characteristics of the mechanic compensation device were researched, and the allowable residual error of the velocity compensation corresponding exposure time was given. A mathematical model for the residual error of velocity compensation was established after analyzing main error sources of the device, then the error model was simulated by the Monte Carlo method. Finally, the compensation ac- curacy was verified by an imaging test with a dynamic target simulator. The test results show that the residual error of velocity compensation is 395.6 μm/s, which is coincident with the simulation data 400 μm/s. It is concluded that the method can estimate accurately the matching error accuracy.

关 键 词：航空相机 像移补偿 速度补偿残差 精度分析 MONTE Carlo算法 

分 类 号：V447.3[航空宇航科学与技术—飞行器设计] V243.5