高空分段拼装式光学窗口防护装置的设计  

Design of protector for altitude sub-assembled optical window

作　　者：李延伟[1,2] 张洪文[1] 远国勤[1] 杨洪波[3] 

机构地区：[1]中国科学院航空光学成像与测量重点实验室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]中国科学院大学,北京100049 [3]中国科学院长春光学精密机械与物理研究所,吉林长春130033

出　　处：《光学精密工程》2014年第3期664-669,共6页Optics and Precision Engineering

基　　金：国防预研资金资助项目(No.ZJ99130B)

摘　　要：针对大视场角航空相机常用的高空分段拼装式光学窗口阶差小的问题,提出了一种适用于该类光学窗口的防护装置。分析了高空分段拼装式光学窗口的任务需求和高空工作环境,完成了整个防护装置的设计;确定了传动机构的参数并对其传动精度进行了分析。最后进行了振动试验和高空环境模拟试验。分析及试验结果表明,所研制的防护装置基频达到111.9Hz,保证了在外界动态载荷作用下的动力学响应;低温(-56.5℃)低压(5.5kPa)环境下传动机构运动平稳、可靠,速度误差仅为1.3%。该防护装置已成功应用于某航空相机,试验显示其有效克服了高空气动阻力及低温低压环境的影响,可以作为其他高空分段拼装式光学窗口防护结构设计的参考。As the common altitude sub-assembled optical window for a aerial camera with larger view angle has a lower gradient, this paper proposes a protector for the altitude sub-assembled optical win- dow. The mission requirement of the window and its working environments were analyzed, and the protector was designed. A transmission mechanism in the protector was designed and the transmission accuracy was analyzed. Finally, the vibration test and simulated altitude environment test were per- formed. The analysis and test results indicate that the first natural frequency of the protector is 111.9 Hz, which can ensure the dynamic responce of the protector under dynamic loading. Moreover, the movement of transmission mechanism is stable and reliable in low-temperature （-56.5℃ ） and low- pressure （5.5 kPa） environments, and the speed error is 1.3%. The protector has been successfully applied in an aerial camera. Experiments show it has effectively overcome the impact of altitude aero- dynamic resistance and low-temperature, low pressure environment, and can be used as a reference for protector designs of other sub-assembled optical windows.

关 键 词：航空相机 光学窗口 防护装置 传动精度 气动阻力 

分 类 号：V447.3[航空宇航科学与技术—飞行器设计]