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1. 中国科学院 长春光学精密机械与物理研究所,吉林 长春,中国,130033
2. 长春工业大学 机电工程学院,吉林 长春,130012
收稿日期:2012-01-29,
修回日期:2012-03-08,
网络出版日期:2012-06-10,
纸质出版日期:2012-06-10
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辛宏伟, 关英俊, 柴方茂. 离轴空间遥感器主支撑结构设计[J]. 光学精密工程, 2012,20(6): 1257-1264
XIN Hong-wei, GUAN Ying-jun, CHAI Fang-mao. Design of main support of off-axis space remote sensor[J]. Editorial Office of Optics and Precision Engineering, 2012,20(6): 1257-1264
辛宏伟, 关英俊, 柴方茂. 离轴空间遥感器主支撑结构设计[J]. 光学精密工程, 2012,20(6): 1257-1264 DOI: 10.3788/OPE.20122006.1257.
XIN Hong-wei, GUAN Ying-jun, CHAI Fang-mao. Design of main support of off-axis space remote sensor[J]. Editorial Office of Optics and Precision Engineering, 2012,20(6): 1257-1264 DOI: 10.3788/OPE.20122006.1257.
长焦距离轴三反(TMA)空间光学遥感器各光学元件的位置精度和动态稳定性与其主支撑结构相关
因此
本文研究了遥感器主支撑结构设计方案。对比分析了主支撑结构的常用形式
确定了桁架结构方案
并对其进行了材料选择和连接工艺分析。推导了三杆结构(桁架基本单元)的一阶频率解析式
并确定了其最佳形式。在初始设计的基础上
利用灵敏度分析和参数优化设计方法得到了一种24杆式主支撑结构。作为验证
对该支撑结构进行了静态翻转和动力学试验。试验结果表明
主支撑由竖直状态翻转到水平状态后
前端倾角变化小于10″
一阶固有频率为55 Hz
振动试验中支杆最大应力为135 MPa
满足各项设计指标要求。
The position precision and dynamic stability of optical elements for an off-axis Three-mirror Anastigmatic (TMA) space remote sensor are dependent on its main support structure
therefore
this paper researches the design scheme of the main support structure for the TMA space remote sensor. After analysis of the common forms of main support structure
a composing of truss support structure was determined
and its materials and connection technique were discussed. The analytical solution for the first order natural frequency of the structure with three struts was derived and the best one was selected. On the basis of a original design
the sensitivity analysis and parameter optimization were used to obtain a main support structure with 24 struts
then it was verified by the static reversal and a dynamic test. Test results show that the front rotation angle change of the main support structure is less than 10″and the first order natural frequency is 55 Hz
when it flips from a vertical state to a horizontal state. Furthermore
the maximum stress of the main support structure is 135 MPa during dynamic tests
which meets the design requirements of all indexes.
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