Optimal Design of Stray Light Suppression Structure for Ultra-Light Space Camera

Mengqi Shao; Lei Zhang; Lei Wei; Xuezhi Jia

doi:10.3788/AOS201939.1122002

Acta Optica Sinica, Volume. 39, Issue 11, 1122002(2019)

Optimal Design of Stray Light Suppression Structure for Ultra-Light Space Camera

Mengqi Shao^1,2、*, Lei Zhang^1,3、**, Lei Wei³, and Xuezhi Jia³

Author Affiliations

¹Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China

²University of Chinese Academy of Sciences, Beijing 100049, China

³Optical-Mechanical Structure Research Laboratory, Chang Guang Satellite Technology Co., LTD, Changchun, Jilin 130031, China

show less

Abstract Get PDF(in Chinese)

Figures & Tables(14)

Fig. 1. Parameters pertinent to design of vanes of the primary mirror baffle

Download full size

Fig. 2. Initial structure of primary mirror baffle

Download full size

Fig. 3. Finite element model and structural parameters of primary mirror baffle

Download full size

Fig. 4. Nephograms of x- and y-direction vibration modes of fundamental frequency of baffle. (a) x direction; (b) y direction

Download full size

Fig. 5. Iteration process of object optimization. (a) Iterative curve of mass; (b) iterative curve of structural compliance

Download full size

Fig. 6. Scene of random vibration test

Download full size

Fig. 7.

Frequency response curve of random vibration of sampling point. (a) x axis; (b) y axis; (c) z axis

Download full size

Fig. 8. Model for tray light analysis

Download full size

Fig. 9. PST curves of optical system in x and y directions. (a) PST curve in x direction; (b) PST curve in y direction

Download full size

Table 1. Performance parameters of CFRP
View table
Table 1. Performance parameters of CFRP
Matetial Longitudinal tensile elastic modulus /GPa Lateral tensile elastic modulus /GPa Longitudinal Poisson's ratio Lateral Poisson's ratio Shear modulus /GPa
CFRP 230.00 9.30 0.27 6.65 6.20

Table 2. Designed variables and optimized results

View table

Table 2. Designed variables and optimized results

Variable	Range /mm	Initial value /mm	Optimization result /mm	Amended result /mm
T_t1	[0.2,0.6]	0.5	0.59	0.48
T_t2	[0.2,0.6]	0.5	0.26	0.24
T_t3	[0.2,0.6]	0.5	0.22	0.24
T_t4	[0.2,0.6]	0.5	0.23	0.24
T_t5	[0.2,0.6]	0.5	0.24	0.24
T_t6	[0.2,0.6]	0.5	0.37	0.48
T_on	[0.6,1.0]	1.0	0.67	0.72
T_under	[0.6,1.0]	1.0	0.98	0.98
T_rib	[0.2,0.6]	0.5	0.23	0.24
T_dgh	[0.2,0.6]	0.5	0.34	0.24

Table 3. Structural performance comparisonbefore and after optimization
View table
Table 3. Structural performance comparisonbefore and after optimization
Performance ${f_{1}}_{}$ /Hz ${f_{1}}_{}$ /Hz Compliance /(N·mm) Mass /g
Initial value 95 117.9 0.03 397.5
Optimization result 125.2 146.7 0.01 243.8
Improvement /% 31.79 24.4 66.6 38.6

Table 4. Test conditions of random vibration
View table
Table 4. Test conditions of random vibration
Frequency /Hz Power spectral density /(g²·Hz^-1) Acceleration root mean square /g
10 0.0000 3.56
80 0.0100
800 0.0100
8000 0.0016

Table 5. Comparison between test and analysis data

View table

Table 5. Comparison between test and analysis data

Direction	Comparison results of frequency scanning test with modal analysis			Comparison results of random vibration test with analysis
Direction	Analysis value of fundamental frequency /Hz	Test value of fundamental frequency /Hz	Relative error /%	Analysis value of acceleration response /g	Test value of acceleration response /g	Relative error /%
x	125.20	125.39	0.15	12.84	11.20	12.70
y	146.70	128.42	12.46	11.20	8.99	10.30
z	609.67	635.45	4.23	10.90	10.11	7.80

Tools

Get Citation

Copy Citation Text

Mengqi Shao, Lei Zhang, Lei Wei, Xuezhi Jia. Optimal Design of Stray Light Suppression Structure for Ultra-Light Space Camera[J]. Acta Optica Sinica, 2019, 39(11): 1122002

Download Citation

EndNote(RIS)BibTex Plain Text

Set citation alerts for article

Save article for my favorites