长焦距遥感相机桁架结构稳定性研究  

Frame Structure Stability of the Long Focal Length Optical Remote Sensor

作　　者：袁野[1] 李志来[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,长春130033

出　　处：《光电工程》2013年第12期54-58,共5页Opto-Electronic Engineering

基　　金：国家863高技术研究发展计划资助项目(2009AA7020107)

摘　　要：长焦距遥感相机框架结构具有主次镜间隔大、结构稳定性难于设计等问题,针对该类型相机结构设计的难题,在详细分析本相机的结构设计输入的基础上,本文提出一种双层14杆桁架结构的设计方案。通过对该方案进行的有限元分析表明,该结构的一阶模态为114.97 Hz,次镜基板绕X轴的倾角为5″,沿Y轴的最大刚体位移为0.03 mm。作为验证,对该桁架结构进行了静态翻转和动力学试验研究,试验结果表明,该桁架结构静态翻转最大倾角变化为6″,动态加载最大倾角变化为6.5″,满足设计输入指标要求。The long focal length remote camera frame structure has a large primary and secondary mirror magnification ratio, structure stability and other issues which are difficuk to be designed. For this type of camera structural design problems, by analyzing a detailed the structural design input of the camera, we propose a double-layer 14 truss structure design. The finite element analysis shows that the first order natural frequency is 114.97 Hz, and secondary mirror substrate around the X-axis angle is 5＂, along the Y-axis maximum rigid body displacement 0.03 mm. By testing truss structure and dynamics of the static rollover, the test results show that the maximum angle truss structure changes in static flip 6＂, and the maximum angle changes dynamically loaded 6.5＂ input indicators meet the design requirements

关 键 词：遥感相机 长焦距 桁架结构 稳定性 

分 类 号：V447.1[航空宇航科学与技术—飞行器设计]