Analysis and Design of Satellite Interface of Laser Altimeter Based on Stiffness Matching

Ziqing Jiang; Daohuan Ye; Jia Hou; Anwei Liu; Genghua Huang

doi:10.3788/CJL221062

Chinese Journal of Lasers, Volume. 50, Issue 14, 1404004(2023)

Analysis and Design of Satellite Interface of Laser Altimeter Based on Stiffness Matching

Ziqing Jiang^1,2, Daohuan Ye^1,2, Jia Hou^1,2, Anwei Liu^1,2, and Genghua Huang^1,2、*

Author Affiliations

¹Key Laboratory of Space Active Optical-Electro Technology, Chinese Academy of Sciences, Shanghai 200083, China

²Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China

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Figures & Tables(17)

Fig. 1. Installation point distribution of laser altimeter

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Fig. 2. Support structure design of laser altimeter based on kinematic mounting

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Fig. 3. Structural diagrams. (a) Schematic of bow hinge of support structure; (b) sectional view of installation interface on optical substrate

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Fig. 4. Finite element model of laser altimeter

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Fig. 5. Probability distributions of errors. (a) Deformation deviation at point B along x direction; (b) deformation deviation at point B along z direction; (c) deformation deviation at point A along x direction; (d) deformation deviation at point A along y direction

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Fig. 6. Layout diagram of laser altimeter optical axis test

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Fig. 7. Frequency sweep test curve of laser altimeter

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Fig. 8. Laser altimeter in experiment vacuum tank

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Fig. 9. Laser spot stability test diagrams

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Table 1. Main optical parameters of laser altimeter
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Table 1. Main optical parameters of laser altimeter
Parameter Optical aperture /mm Field of view /μrad Laser divergence angle /μrad Focal length /mm Concentricity /μrad
Value 218 380 ≤60 1000 ≤60

Table 2. Flexible hinge parameters and bending stiffness
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Table 2. Flexible hinge parameters and bending stiffness
Elastic modulus /GPa Width /mm Thickness /mm Cutting radius /mm
Bending stiffness /
rad
110 35 5 3.5 8.62×10³

Table 3. Optical plate parameters and bending stiffness
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Table 3. Optical plate parameters and bending stiffness
Elastic modulus /GPa Width /mm Height /mm Length /mm Bending stiffness /rad
180 60 19 60 6.62×10⁴

Table 4. Basic parameters of satellite cabin board
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Table 4. Basic parameters of satellite cabin board
Elastic modulus E_f /GPa Honeycomb height h_c /mm
Thickness
h_f /mm
70 19 0.5

Table 5. Comparison of stiffness between satellite cabin board and altimeter load mounting point
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Table 5. Comparison of stiffness between satellite cabin board and altimeter load mounting point
Component Stiffness at point B /（10⁶N·m^-1） Stiffness at point A /（10⁶N·m^-1）
x y z x y z
Satellite cabin board 2.08 35.7 38.5 3.23 40.98 28.9
Laser altimeter 0.93 8.33 43.5 3.45 27.8 40

Table 6. Statistical values of errors

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Table 6. Statistical values of errors

Error	RMS value /μm
Deformation deviation at point B along x direction	102.76
Deformation deviation at point B along z direction	174.27
Deformation deviation at point A along x direction	72.48
Deformation deviation at point A along y direction	167.46

Table 7. Analysis results for concentricity of emission-receiving optical axis
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Table 7. Analysis results for concentricity of emission-receiving optical axis
Declination around x axis /μrad Declination around y axis /μrad Concentricity /μrad
1.85 -5.25 5.56

Table 8. Experiment results for concentricity of emission-receiving optical axis
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Table 8. Experiment results for concentricity of emission-receiving optical axis
Condition Horizontal declination /（″） Vertical declination /（″）
Before installation 2.8 -4.3
After installation 3.4 -5.9
After vibration experiment 6.7 -0.9

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Ziqing Jiang, Daohuan Ye, Jia Hou, Anwei Liu, Genghua Huang. Analysis and Design of Satellite Interface of Laser Altimeter Based on Stiffness Matching[J]. Chinese Journal of Lasers, 2023, 50(14): 1404004

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