Optics and Precision Engineering, Volume. 30, Issue 12, 1429(2022)
Carbon fiber thin-walled cylindrical support structure between primary and secondary mirror in space camera
Figures & Tables(27)
Fig. 4. Schematic diagrams of the cross-sectional form of the longitudinal stiffener
Fig. 5. Flow chart of optimization of supporting structure of cylindrical primary and secondary mirrors
Fig. 7. Deformation cloud diagram under the condition of uniform temperature rise at 2 ℃
Fig. 8. Deformation cloud diagram under the coupling condition of 1g self-weight and 2 ℃ uniform temperature rise
Fig. 9. Vibration of cylindrical primary and secondary mirror support structure under restraint
Fig. 11. Flow chart of turning the tooling to realize the support structure turning 180° around the
Fig. 12. Frequency sweep test of primary and secondary mirror support structure in 3 directions （where
Fig. 13.
Fig. 14.
Fig. 15.
Table 1. Single-layer board material parameters of M40J
View tableView in ArticleTable 1. Single-layer board material parameters of M40J
型号 Ex/GPa Ey/GPa a1/℃-1 a2/℃-1 μ M40J 200 7 -5.9e-7 2.83e-5 0.3
Table 2. Analysis and comparison of layout form of secondary mirror support beam
View tableView in ArticleTable 2. Analysis and comparison of layout form of secondary mirror support beam
项目 一阶频率/Hz 轴向频率/Hz 次镜自重位移/μm 对称支撑 110.6 133.2 23.53 偏置支撑 113.8 138.8 21.24 分析对比 2.89% 4.20% -9.73%
Table 3. Analysis and comparison of sectional forms of longitudinal stiffeners
View tableView in ArticleTable 3. Analysis and comparison of sectional forms of longitudinal stiffeners
项目 一阶频率/Hz 轴向频率/Hz 次镜自重位移/μm “⊥”型 112.4 139.5 22.24 “几”型 114.5 139.7 20.68 分析对比 1.87% 0.14% -7.01%
Table 4. Value ranges of key dimension traverses
View tableView in ArticleTable 4. Value ranges of key dimension traverses
变量 最小值/mm 最大值/mm Hliang 80 120 Kliang 12 16 Hhuan 20 40 Khuan 50 70 Hjizi 30 50 Kjizi 30 60
Table 5. Results of layer thickness optimization for each part
View tableView in ArticleTable 5. Results of layer thickness optimization for each part
项目 筒身 额外翻边 次镜支撑梁 纵筋 铺层厚度 2.0 4.0 3.1 1.5
Table 6. Result of optimal equivalent parameters for key layup angles of each structure
View tableView in ArticleTable 6. Result of optimal equivalent parameters for key layup angles of each structure
部件 Ex/GPa Ey/GPa a1/℃-1 a2/℃-1 μ 筒身 109.5 49.4 -1.55e-7 2.17e-6 0.39 额外翻边 45.9 139.5 2.87e-6 -1.86e-7 0.08 次镜支撑梁 221.1 21.8 -8.12e-7 5.58e-6 0.49 纵筋 172.1 7.4 -1.60e-6 2.02e-5 1.24
Table 7. Relative deformation of primary and secondary mirrors under various static conditions
View tableView in ArticleTable 7. Relative deformation of primary and secondary mirrors under various static conditions
取向 1g自重 2 ℃均匀温升 耦合工况 相对位移/μm 相对转角/（″） 相对位移/μm 相对转角/（″） 相对位移/μm 相对转角/（″） X向 1.91 0.14 0.05 0.03 1.96 0.17 Y向 0.92 0.22 1.11 0.17 2.03 0.39 Z向 0.01 0.84 5.96 4.12 5.97 4.96
Table 8. Description of the 1st-3rd and 14th order frequencies and corresponding mode shapes of the primary and secondary mirror support structures
View tableView in ArticleTable 8. Description of the 1st-3rd and 14th order frequencies and corresponding mode shapes of the primary and secondary mirror support structures
阶数 频率f/Hz 振型描述 1 129.1 前端翻边呼吸，带动次镜沿X向平动 2 129.4 前端翻边呼吸，带动次镜沿Y向平动 3 167.6 筒身局部模态 14 190.2 次镜沿Z向摆动
Table 9. Stability test data
View tableView in ArticleTable 9. Stability test data
测量分组 测量对象 实测值/（°） 相对差值/（°） 变化值/（″） 测量时间Date/Time 第1次测量 工装基准 90.132 0 - - 21/14：37 次镜接头 89.833 4 -0.298 6 基准 21/14：54 第2次测量 工装基准 90.131 2 - - 22/09：20 次镜接头 89.832 5 -0.298 7 -0.36 22/09：25 第3次测量 工装基准 90.131 3 - - 23/14：21 次镜接头 89.832 7 -0.298 6 0 23/14：28
Table 10. Static testing data before and after flipping
View tableView in ArticleTable 10. Static testing data before and after flipping
测量分组 测量对象 实测值/° 相对差值/° 变化值/″ 测量时间Date/Time 翻转前测量 工装基准 90.131 3 - - 23/14：21 次镜接头 89.832 7 -0.298 6 基准 23/14：28 翻转后第1次 工装基准 90.075 1 - - 23/14：57 次镜接头 90.373 4 -0.298 3 -0.54 23/15：05 翻转后第2次 工装基准 90.074 8 - - 24/10：40 次镜接头 90.373 2 0.298 4 0.36 24/10：51
Table 11. Characteristic-level sinusoidal sweep vibration test conditions
View tableView in ArticleTable 11. Characteristic-level sinusoidal sweep vibration test conditions
频率范围/Hz 振动幅值 扫描率/（oct·min-1） 10~500 0.1g 4
Table 12. Analysis and comparison of swept frequency vibration test and simulation results
View tableView in ArticleTable 12. Analysis and comparison of swept frequency vibration test and simulation results
试验结果/Hz 仿真结果/Hz 误差 前端翻边X向扫频 117.8 129.1 8.75% 前端翻边Y向扫频 116.9 129.4 9.66% 筒身 164.3 167.6 1.97% 次镜安装面 182.2 190.2 4.21%
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Xunpeng SONG, Xiaoxue GONG, Lei ZHANG, Jian YUAN, Yunfei YANG. Carbon fiber thin-walled cylindrical support structure between primary and secondary mirror in space camera[J]. Optics and Precision Engineering, 2022, 30(12): 1429
Paper Information
Category: Micro/Nano Technology and Fine Mechanics
Received: Feb. 23, 2022
Accepted: --
Published Online: Jul. 5, 2022
The Author Email: SONG Xunpeng (songxunpeng@163.com)
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