Abstract
In order to reduce the thermal deformation of the surface optical reflector under wind load, extreme heat, dead weight, rotation and other harsh environments, this paper designed and studied the flexible support structure scheme, so that the reflector has better thermal stability and a certain structural stiffness, meeting the mechanical requirements.
The 1 m caliber Sic mirror and supporting structure are studied in this paper, the three point and multi-point supporting structure schemes are compared and analyzed, then the influence of supporting points on the structure and the insufficient thermal stability of the supporting structure are obtained. A six-point back flexible support scheme is proposed to analyze the structural performance and material selection of the whole supporting part. A new type of strut structure with single axis hinge strut and cross strut is proposed to compensate the linear displacement, rotation and certain stiffness. The results show that the maximum stress of 21.77 MPa is less than the allowable stress of material, which meets the mechanical properties. Finally, mirror whole assembly structure thermal simulation analysis, the simulation results show that when the flexible support size for: minimum cross section d = 9 mm in diameter, hinge arc radius r = 16 mm, in three orthogonal to the under the action of gravity and the steady-state temperature 20 ℃, precision of the reflection mirror type RMS \( \le {\lambda \mathord{\left/ {\vphantom {\lambda {40\;}}} \right. \kern-0pt} {40\;}}\left( {\lambda = 380\,{\text{nm}}} \right) \), meet the thermal dimensional stability and mirror observation performance requirements.
Simulation analysis shows that the support structure scheme designed in this paper can meet the requirements of support mechanics and stiffness, it will improve the precision of reflection mirror, and provide the design idea, which can be basis for the large diameter ground mirror to maintain stable surface shape under complex working conditions.
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References
Jianing, H., Jihong, D., Pingwei, Z.: Review on active support system of large ground - based telescope primary mirror. Laser Infrared 47(01), 5–12 (2017)
Kejun, W., Jihong, D., Pingwei, Z., Xiaoyu, W., Ping, J.: Back support structure design of space remote sensor. Laser Infrared 1–11 (2019)
Yang, L., Hongbo, Y., Shaobin, L., Yanwei, L.: Lightweight primary reflector and design of supporting structure for space imaging system. Comput. Simulation 25, 314–316 (2008)
Qingwen, W.: Multi-point support pattern of a high precision lightweight rectangular mirror. Optics Precis. Eng. 06, 61–65 (1999)
Hall, H.D.: Problems in adapting small fabrication techniques to large mirrors. In: Optical Telescope Technology Workshop, NASA Report SP-233. NASA, Huntsville, p. 149 (1970)
Jingxu, Z.: Overview of structure technologies of large aperture ground-based telescopes. Chin. Optics 5(04), 327–336 (2012)
Fuguo, W., Bing, Q., Jingxu, Z.: Flexible passive support system for 2 m Sic reflective mirror. Optics Precis. Eng. 25(10), 2591–2598 (2017)
Shang, C.: Research on the floating support of 1.2 m ground-based primary mirror (2015). http://www.opt.ac.cn/
Zongxuan, L., Lei, Z., Jinsong, Y., Peng, X., Guang, J., Lin, K.: Design of cartwheel bi-axial flexural hinge. Optics Precis. Eng. 21(09), 2317–2325 (2013)
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Yang, S.X., Li, R. (2020). Study on Flexible Support Scheme of 1 M Diameter Foundation Mirror. In: Duan , B., Umeda, K., Hwang, W. (eds) Proceedings of the Seventh Asia International Symposium on Mechatronics. Lecture Notes in Electrical Engineering, vol 589. Springer, Singapore. https://doi.org/10.1007/978-981-32-9441-7_30
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DOI: https://doi.org/10.1007/978-981-32-9441-7_30
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