Structural optimization design and analysis of a 2-m space-based mirror

Sheng Wang; Wei Wang; Bin Hu; DeJing Wei; ShangMin Lin; PengFei Cheng; GuoRui Ren; XueWu Fan

doi:10.1117/12.2682098

16 June 2023 Structural optimization design and analysis of a 2-m space-based mirror

Sheng Wang, Wei Wang, Bin Hu, DeJing Wei, ShangMin Lin, PengFei Cheng, GuoRui Ren, XueWu Fan

Proceedings Volume 12639, Third International Conference on Mechanical Design and Simulation (MDS 2023); 126390N (2023) https://doi.org/10.1117/12.2682098
Event: Third International Conference on Mechanical Design and Simulation (MDS 2023), 2023, Xi'an, China

Abstract

In terms of optical requirements and launch costs, large-diameter mirror should not only ensure fine surface accuracy, but also pursue high the rate of lightweight. Starting with material selection and shape design, the structure design of the 2 m mirror of a space remote sensor is carried out, and the preliminary mirror body is obtained. Then, combined with a platform of design optimization called Isight that integrated modeling software, finite element analysis software, data processing and analysis software, we optimized the key structural parameters of the mirror in detail, obtained a SiC mirror with the mass of 178 kg, its the rate of lightweight was as high as 90.9% and the RMS of surface shape accuracy under gravity deformation is 2.2 nm. On this basis, we designed and simulated the flexible support and other mirror components. The results indicated that the first-order natural frequency of the mirror components was 113.8 Hz, the RMS of surface shape accuracy was 8.1 nm under gravity deformation when the optical axis is horizontal, and 8.2 nm under the condition of 2°C temperature change, which were better than λ/60, could meet the requirement of the design index completely.

Citation Download Citation

Sheng Wang, Wei Wang, Bin Hu, DeJing Wei, ShangMin Lin, PengFei Cheng, GuoRui Ren, and XueWu Fan "Structural optimization design and analysis of a 2-m space-based mirror", Proc. SPIE 12639, Third International Conference on Mechanical Design and Simulation (MDS 2023), 126390N (16 June 2023); https://doi.org/10.1117/12.2682098

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