Topology and parametric optimization based lightweight design of a space reflective mirror

Guang Liu; Liang Guo; Xintong Wang; Qingwen Wu

doi:10.1117/1.OE.57.7.075101

5 July 2018 Topology and parametric optimization based lightweight design of a space reflective mirror

Guang Liu, Liang Guo, Xintong Wang, Qingwen Wu

Author Affiliations +

Funded by: National Natural Science Foundation of China (NSFC), Youth Innovation Promotion Association of the Chinese Academy of Sciences

Optical Engineering, Vol. 57, Issue 7, 075101 (July 2018). https://doi.org/10.1117/1.OE.57.7.075101

Abstract

For large space telescopes, the design of lightweight primary mirrors with an acceptable level of optical performance is a challenge. A parametric optimization method based on topology optimization of the basic configuration of the mirror is proposed. A finite-element model of the mirror is generated with linear shell elements, and the optimal distribution of the material is obtained using the continuum topology optimization technique. The lightweight ribs are grouped according to the results of topology optimization results. The design of experiment method is used to pick out the key factors for parametric optimization. The RMS value of the surface shape error of the mirror and the total mass of the mirror are treated as the objective merit functions, and the first-order natural frequency of the mirror is taken as a constraint for parametric optimization. Results show that the local stiffness of the mirror is significantly affected by the thicknesses of the ribs at the corresponding positions. The optimum mirror design obtained using our optimization method is compared with the initial design, and the comparison shows superior optical performance for the optimized mirror.

Citation Download Citation

Guang Liu, Liang Guo, Xintong Wang, and Qingwen Wu "Topology and parametric optimization based lightweight design of a space reflective mirror," Optical Engineering 57(7), 075101 (5 July 2018). https://doi.org/10.1117/1.OE.57.7.075101

Received: 11 January 2018; Accepted: 12 June 2018; Published: 5 July 2018

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE