Analysis and elimination of adhesive bonding force of flexible supported space mirror

Table 1. Parameters of material performance
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Table 1. Parameters of material performance
Parameter Mirror Glue Pad Bipod rod
Material ULE RTV Invar 4J32B TC4R
Density/10³ kg·m⁻³ 2.21 1.50 8.87 4.45
Modulus/GPa 67 3.68 114 110
Coefficient of thermal expansion/10⁻⁶ K⁻¹ 0.03 252 0.03 9.0

Table 2. Analysis of adhesive curing
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Table 2. Analysis of adhesive curing
Glue spot/mm Shape of surface Deformation
1 RMS<0.001λ

Table 3. Temperature effect analysis
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Table 3. Temperature effect analysis
Condition Shape of surface Deformation
2 ℃ temperature rise RMS<0.001λ

Table 4. Influence of adhesive curing
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Table 4. Influence of adhesive curing
Condition Shape of surface Deformation
Without pad RMS=0.012λ
With pad RMS=0.013λ

Table 5. Effect of vacuum degassing
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Table 5. Effect of vacuum degassing
Condition Shape of surface Deformation
Outgassing experiment RMS=0.020λ

Table 6. Stress relieving vibration condition and effects
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Table 6. Stress relieving vibration condition and effects
Condition Shape of surface Deformation
Total root mean square of 9 grms RMS=0.019λ

Table 7. Hot soak test and its effects
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Table 7. Hot soak test and its effects
Condition Shape of surface Deformation
40 ℃ （72 h） RMS=0.015λ
60 ℃ （72 h） RMS=0.014λ

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Yongjian Wu, Yong Liu, Xin Sun. Analysis and elimination of adhesive bonding force of flexible supported space mirror[J]. Infrared and Laser Engineering, 2022, 51(4): 20210496

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