Design and analysis of micro stress flexible support structure of reflector in all day star tracker

Yang Liu; Su Chen; Lingguang Wang; Bo Geng; Hu Wang; Jie Liu

doi:10.1117/12.2257424

28 February 2017 Design and analysis of micro stress flexible support structure of reflector in all day star tracker

Yang Liu, Su Chen, Lingguang Wang, Bo Geng, Hu Wang, Jie Liu

Proceedings Volume 10256, Second International Conference on Photonics and Optical Engineering; 102562I (2017) https://doi.org/10.1117/12.2257424
Event: Second International Conference on Photonics and Optical Engineering, 2016, Xi'an, China

Abstract

To reduce the surface deformation of a star tracker reflector in a complex and execrable environment, a micro stress flexible support structure was designed according to the circular optical reflector subassembly. By defining the thickness, width and radius as design variables, the flexible hinge in an circular reflector subassembly was optimized. Then, the surface figure precision, structural strength and dynamic stiffness of the reflector subassembly in the thermal-structural coupling state were analyzed with the finite element method. Simulation results show that the natural frequency of the reflector is enough, which has a sufficiently high dynamic stiffness. Both surface precision RMS of the reflector (8.34nm, 9.26nm) have reached the index requirements of the optical system (λ/10, λ=632.8nm) under gravity and uniform temperature change from -20℃ to 65℃. The results show that the design for the micro stress flexible support structure is reasonable and feasible, and achieves the design goal.

Citation Download Citation

Yang Liu, Su Chen, Lingguang Wang, Bo Geng, Hu Wang, and Jie Liu "Design and analysis of micro stress flexible support structure of reflector in all day star tracker", Proc. SPIE 10256, Second International Conference on Photonics and Optical Engineering, 102562I (28 February 2017); https://doi.org/10.1117/12.2257424

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