Research and Experimental Verification on Topology-Optimization Design Method of Space Mirror Based on Additive-Manufacturing Technology

doi:10.3390/machines9120354

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	Research and Experimental Verification on Topology-Optimization Design Method of Space Mirror Based on Additive-Manufacturing Technology
	Y. C. Fan; D. Y. Dong; C. Li; Y. X. Sun; Z. Y. Zhang; F. L. Wu; L. W. Yang; Q. H. Li and Y. J. Guan
	2021
发表期刊	Machines
卷号	9 期号:12 页码:16
摘要	As one of the most-critical components in space optical cameras, the performance of space mirrors directly affects the imaging quality of space optical cameras, and the lightweight form of mirror blanks is a key factor affecting the structural quality and the surface-shape accuracy of mirrors. For the design requirements of lightweight and high surface-shape accuracy with space mirrors, this study proposes a design and manufacturing method that integrates topology-optimization with additive-manufacturing technology. This article firstly introduced the basic process and key technologies of space-mirror design and analyzed the superiority of combining a topology-optimized configuration design and additive-manufacturing technology; secondly, the topology-optimized design method of a back-open-structure mirror was used to complete the scheme design of a phi 260 mm aperture mirror; finally, the laser selective-melting manufacturing technology was used to complete the phi 260 mm aperture mirror blank. The mirror and its support structure were assembled and tested in a modal mode; the resonant frequencies of the mirror assembly were all over 600 Hz; and the deviation from the analytical results was within 2%. The optical surface of the mirror was turned by the single-point diamond-turning (SPDT) technique. The accuracy of the optical surface was checked by a Zygo interferometer. The RMS accuracy of the mirror surface was 0.041 lambda (lambda is the wavelength; lambda = 632 nm). In the test of the influence of gravity on the surface-shape accuracy, the mirror was turned over, which was equivalent to twice the gravity, and the RMS of the mirror surface-shape accuracy was 0.043 lambda, which met the requirement. The verification results show that the mirror designed and fabricated by the additive-manufacturing-based mirror-topology-optimization method can be prepared by the existing process, and the machinability and mechanical properties can meet the requirements, which provides an effective development method for improving the structural design and optimizing the manufacturing of space reflectors.
DOI	10.3390/machines9120354
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收录类别	sci
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/67035
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Y. C. Fan,D. Y. Dong,C. Li,et al. Research and Experimental Verification on Topology-Optimization Design Method of Space Mirror Based on Additive-Manufacturing Technology[J]. Machines,2021,9(12):16.
APA	Y. C. Fan.,D. Y. Dong.,C. Li.,Y. X. Sun.,Z. Y. Zhang.,...&Q. H. Li and Y. J. Guan.(2021).Research and Experimental Verification on Topology-Optimization Design Method of Space Mirror Based on Additive-Manufacturing Technology.Machines,9(12),16.
MLA	Y. C. Fan,et al."Research and Experimental Verification on Topology-Optimization Design Method of Space Mirror Based on Additive-Manufacturing Technology".Machines 9.12(2021):16.

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