Infrared and Laser Engineering, Volume. 53, Issue 11, 20240325(2024)
Design of high stiffness support structure for mobile meter-level primary mirror
Figures & Tables(26)
Fig. 6. Schematic diagram of tangential thermal decoupling of primary mirror
Fig. 11. Random vibration PSD curves of road transport with different severity levels
Fig. 12. Displacement response of primary mirror and support system
Fig. 16. Schematic diagram of shape accuracy detection for primary mirror
Table 1. Subsidence of primary mirror
View tableView in ArticleTable 1. Subsidence of primary mirror
Six-point positioning/μm 16 point uniform load bearing +6 point positioning/μm Theoretical analysis value 23.8 0 Finite element analysis value 24.3 3.6
Table 2. Thermal deformation of primary mirror at operating ambient temperature
View tableView in ArticleTable 2. Thermal deformation of primary mirror at operating ambient temperature
Operating temperature/℃ Surface shape RMS/nm Surface shape PV/nm Stress/ MPa Curvature change/ mm −5 7.3 44.9 5.81 −0.12 +45 7.7 48.9 5.81 0.13
Table 3. Thermal deformation of primary mirror at storage ambient temperature
View tableView in ArticleTable 3. Thermal deformation of primary mirror at storage ambient temperature
Storage temperature/℃ Surface shape RMS/nm Surface shape PV/nm Stress/ MPa Curvature change/mm −25 13.3 82.4 10.5 −0.22 +55 9.2 58.2 6.97 0.15
Table 4. Results of gravity deformation of primary mirror in support system
View tableView in ArticleTable 4. Results of gravity deformation of primary mirror in support system
Gravity Surface shape RMS/nm Surface shape PV/nm Stress/ MPa Curvature change/ mm Optical axis level 5.7 36.8 5.81 -0.12
Table 5. Natural frequency of global mode
View tableView in ArticleTable 5. Natural frequency of global mode
Mode number f/Hz Mode description 1 54.93 Primary mirror tilts left and right 2 56.81 Primary mirror tilts up and down 3 71.62 Primary mirror transports along the optical axis 4 99.05 Primary mirror transports left and right 5 184.95 Primary mirror transports up and down
Table 6. Power spectral density of random vibration acceleration
View tableView in ArticleTable 6. Power spectral density of random vibration acceleration
Frequency/Hz Power spectral density/(m·s−2)2·Hz−1 Level 1 Level 2 Level 3 1 0.000036 0.000018 0.000009 3 0.06 0.03 0.015 4 0.06 0.03 0.015 8 0.007 0.0035 0.00175 12 0.016 0.008 0.004 30 0.006 0.003 0.0015 40 0.015 0.0075 0.00375 60 0.0014 0.0007 0.00035 100 0.001 0.0005 0.00025 200 0.00005 0.000025 0.0000125 Acceleration RMS/g 0.82 0.58 0.41
Table 7. Displacement response of primary mirror and support system
View tableView in ArticleTable 7. Displacement response of primary mirror and support system
Deformation direction Maximum displacement response/mm Maximum response position X axis 0.11 Ball hinge edge Y axis 0.10 Counterweight tail Z axis 0.36 Ball hinge edge
Table 8. Displacement response of primary mirror
View tableView in ArticleTable 8. Displacement response of primary mirror
Deformation direction Maximum displacement response/μm Maximum response position X axis 1.6 Primary mirror bottom Y axis 9.7 Primary mirror back Z axis 12.3 Primary mirror bottom
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Changlong HE, Xiaoxia WU, Yongzhi ZHAO, Pengyu CAO, Yuequn WANG. Design of high stiffness support structure for mobile meter-level primary mirror[J]. Infrared and Laser Engineering, 2024, 53(11): 20240325
Paper Information
Category: 光学设计
Received: Jul. 16, 2024
Accepted: --
Published Online: Dec. 13, 2024
The Author Email: WU Xiaoxia (wu-xiaoxia@sohu.com)
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