Infrared and Laser Engineering, Volume. 52, Issue 12, 20230336(2023)
Laser communication flat back servo pendulum mirror support structure optimization design
Figures & Tables(21)
Fig. 3. Pendulum mirror-shaped cloud map of standard Earth gravity
Fig. 4. Schematic diagram of flexible hinge structure. (a) Schematic diagram of hinge 1; (b) Schematic diagram of hinge 2
Fig. 5. Schematic diagram of the main parameters of the flexible hinge structure
Fig. 7. Pendulum mirror 5 ℃ temperature rise (fall) and standard earth gravity effect of the mirror surface surface shape cloud map
Fig. 8. Physical drawing of the pendulum mirror assembly and the whole machine assembly diagram
Fig. 10. Results of pendulum mirror assembly surface shape testing at different temperatures
Table 1. Material properties of reflector components
View tableView in ArticleTable 1. Material properties of reflector components
Part Material E/GPa ρ/g·cm−3 α/℃ k/W∙(M∙K)−3 ν Mirror Zerodur 91 2.53 0.05 1.64 0.24 Support TC4 109 4.44 8.9 7.8 0.31
Table 2. Parameter level table of the position of the bonding point of the pendulum mirror
View tableView in ArticleTable 2. Parameter level table of the position of the bonding point of the pendulum mirror
Level Factors α/(°) L1/mm L2/mm 1 106 20 14 2 107 21 15 3 108 22 16 4 109 23 17
Table 3. Orthogonal test scheme of the position of the bonding point of the pendulum mirror
View tableView in ArticleTable 3. Orthogonal test scheme of the position of the bonding point of the pendulum mirror
No. α/(°) L1/mm L2/mm V/nm 1 106 20 14 0.861 2 106 21 15 0.804 3 106 22 16 0.877 4 106 23 17 1.067 5 107 20 15 0.851 6 107 21 14 0.660 7 107 22 17 1.070 8 107 23 16 0.863 9 108 20 16 0.895 10 108 21 17 0.905 11 108 22 14 1.059 12 108 23 15 1.053 13 109 20 17 1.117 14 109 21 16 1.033 15 109 22 14 1.198 16 109 23 15 1.289
Table 4. Range analysis of factors of the position of the bonding point of the pendulum mirror
View tableView in ArticleTable 4. Range analysis of factors of the position of the bonding point of the pendulum mirror
Factors A B C α/(°) L1/mm L2/mm N1 0.902 0.931 0.945 N2 0.861 0.851 0.999 N3 0.978 1.051 0.917 N4 1.159 1.068 1.039 R 0.298 0.217 0.122
Table 5. Parameter level of flexible support structure
View tableView in ArticleTable 5. Parameter level of flexible support structure
Level Factors a/mm h/mm b/mm r/mm s/mm t/mm 1 12 2.4 16.5 2 2.4 8 2 13 2.8 17 2.5 2.8 9 3 14 3.2 17.5 3 3.2 10 4 15 3.6 18 3.5 3.6 11 5 16 4 18.5 4 4 12
Table 6. Orthogonal test scheme of flexible support structure
View tableView in ArticleTable 6. Orthogonal test scheme of flexible support structure
No. a/mm h/mm b/mm r/mm s/mm t/mm P/nm 1 12 2.4 16.5 2 2.4 8 24.03 2 12 2.8 17 2.5 2.8 9 33.04 3 12 3.2 17.5 3 3.2 10 44.58 4 12 3.6 18 3.5 3.6 11 59.03 5 12 4 18.5 4 4 12 70.99 6 13 2.4 17 3 3.6 12 41.27 7 13 2.8 17.5 3.5 4 8 38.35 8 13 3.2 18 4 2.4 9 22.70 9 13 3.6 18.5 2 2.8 10 33.63 10 13 4 16.5 2.5 3.2 11 47.07 11 14 2.4 17.5 4 2.8 11 20.58 12 14 2.8 18 2 3.2 12 30.08 13 14 3.2 18.5 2.5 3.6 8 25.17 14 14 3.6 16.5 3 4 9 44.48 15 14 4 17 3.5 2.4 10 24.02 16 15 2.4 18 2.5 4 10 29.49 17 15 2.8 18.5 3 2.4 11 16.25 18 15 3.2 16.5 3.5 2.8 12 22.05 19 15 3.6 17 4 3.2 8 16.60 20 15 4 17.5 2 3.6 9 30.25 21 16 2.4 18.5 4 3.2 9 12.01 22 16 2.8 16.5 2 3.6 10 20.19 23 16 3.2 17 2.5 4 11 32.46 24 16 3.6 17.5 3 2.4 12 14.84 25 16 4 18 3.5 2.8 8 10.09
Table 7. Range analysis of factors of flexible support structure
View tableView in ArticleTable 7. Range analysis of factors of flexible support structure
Factors A B C D E F a/mm h/mm b/mm r/mm s/mm t/mm N1 46.33 25.48 31.64 27.70 20.37 22.85 N2 36.60 27.58 29.48 33.45 23.88 28.57 N3 28.87 29.27 29.72 32.28 30.07 30.38 N4 22.93 33.72 30.28 30.71 35.18 35.08 N5 17.92 36.48 31.61 28.58 43.15 35.85 R 28.41 11 2.16 5.75 22.78 13
Table 8. Results of modal analysis of pendulum mirror assembly
View tableView in ArticleTable 8. Results of modal analysis of pendulum mirror assembly
Order Fz/Hz Mode of vibration 1 446.66 Pendulum mirror translates along the x-axis 2 1137.7 Pendulum mirror translates along the y-axis 3 1248.2 Pendulum mirror translates along the z-axis 4 1282.7 Pendulum mirror rotates around x-axis 5 1361.1 Pendulum mirror rotates around z-axis 6 2134.1 Pendulum mirror rotates around y-axis
Table 9. Analysis results of 5 ℃ temperature rise (fall) and standard earth gravity under the pendulum mirror surface shape accuracy (Unit: nm)
View tableView in ArticleTable 9. Analysis results of 5 ℃ temperature rise (fall) and standard earth gravity under the pendulum mirror surface shape accuracy (Unit: nm)
Load case direction Temperature rise Temperature reduction PV RMS PV RMS X λ/16.34 λ/92.13 λ/16.75 λ/95.13 Y λ/17.23 λ/94.97 λ/17.47 λ/95.43 Z λ/16.55 λ/83.28 λ/19.88 λ/101
Table 10. Results of pendulum mirror assembly face shape test (Unit: nm)
View tableView in ArticleTable 10. Results of pendulum mirror assembly face shape test (Unit: nm)
Temperature/°C PV RMS 15 λ/5.41 λ/45.34 20 λ/5.49 λ/45.71 25 λ/5.10 λ/43.28
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Xiaoming Li, Minghang Guo, Yingze Liu, Jialong Yao, Libiao Wang, Yunchong Dong, Xilai Chen. Laser communication flat back servo pendulum mirror support structure optimization design[J]. Infrared and Laser Engineering, 2023, 52(12): 20230336
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Received: Jun. 7, 2023
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Published Online: Feb. 23, 2024
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