The mirror assembly of an electro-optical tracking and pointing system for a space borne laser communication system is studied, three flexible supports are contrasted, according to practical applications of space load, the structural stiffness advantage and surface figure of the three flexible support scheme have been evaluated. The analysis results show that the surface figure RMS of neck side grooving flexible support scheme resisting microgravity and thermal environment change can reach 2.05 nm and 8.88 nm, the fundamental frequency mode is 926.1 Hz, in the balance between the surface figure RMS and the higher stiffness resisting hevibration damage, the flexible design is most reasonable. On this basis, the parameterized design of the flexible support structure of the reflector is completed and dynamic analysis have been done. The maximum stress of the frequency response is 96 Mpa, which is less than the material's tensile strength limit. The results of random vibration analysis show that root mean square of acceleration response is 11.14 g RMS, meeting 3σ law. Finally, a 0.2 g sine sweeptest proves that the relative error of the modal analysis is 2%, the experimental result show that the analysis results are basically accurate and reliable, that is, flexible support design is reliable to meet the requirements of use.
Design of flexure support of space compact reflector subassembly and dynamic analysis
First published at:May 01, 2018
1 Li X, Xu Z B, Li J Q. Design of new flexure hinge support of space reflector subassembly[J]. Electronic Measurement Technology, 2014, 37(8): 1-6.
2 Schaffer C B, Jamison A O, Mazur E. Morphology of femtosecond laser-induced structural changes in bulk transparent materials[J]. Applied Physics Letters, 2004, 84(9): 1441-1443. DOI:10.1063/1.1650876
3 Liu M, Zhang X M, Fatikow S. Design and analysis of a multi-notched flexure hinge for compliant mechanisms[J]. Precision Engineering, 2017, 48: 292-304. DOI:10.1016/j.precisioneng.2016.12.012
4 Du Z J, Yang M, Dong W, et al. Static deformation modeling and analysis of flexure hinges made of a shape memory alloy[J]. Smart Materials and Structures, 2016, 25(11) : 158-163.
6 Smith S T, Badami V G, Dale J S, et al. Elliptical flexure hinges[J]. Review of Scientific Instruments, 1997, 68(3): 1474-1483. DOI:10.1063/1.1147635
7 Chen G M, Liu X Y, Jia J Y. Compliance calculation of elliptical flexure hinge[J]. Chinese Journal of Mechanical Engineering, 2006, 42(S1): 111-115.
8 Zuo X Y, Liu X M. Calculation and analysis of rotational stiffness for three types of flexure hinges[J]. Chinese Journal of Scientific Instrument, 2006, 27(12): 1725-1728.
9 Li Z X, Chen X, Zhang L, et al. Design of cartwheel flexural support for a large aperture space mirror[J]. Acta Optica Sinica, 2014, 34(6): 210-218.
10 Li X F, Wang B, Hu Y. Influence of mirror thermal distortion in thermosphere to space-to-ground laser communication links[J]. Journal of Astronautics, 2005, 26(5): 581-585.
11 Sun B Y. Design and analysis on the flexible structure of the optical reflector based on the computer aided engineering[J]. Opto-Electronic Engineering, 2009, 36(1): 103-106.
12 Zhang Y G, Kou S, Yu J J, et al. Design and analysis of the primary mirror subassembly in a star sensor[J]. Aviation Precision Manufacturing Technology, 2010, 46(5): 14-16.
13 Zhang X J, Yu J J, Guo X H, et al. Dynamic analysis of CCD drawtube of the lightweight space camera[J]. Machine Design and Manufacturing Engineering, 2008, 37(5): 27-30, 34.
Supported by National Natural Science Foundation of China(91338116)
Get Citation: Liu Ming, Zhang Lizhong, Li Xiang, et al. Design of flexure support of space compact reflector subassembly and dynamic analysis[J]. Opto-Electronic Engineering, 2018, 45(5): 170686.