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Hybrid optimization methodology of variable densities mesh model for the axial supporting design of wide-field survey telescope
Wang, Hairen1,2; Lou, Zheng1,2; Qian, Yuan1,2; Zheng, Xianzhong1,2; Zuo, Yingxi1,2
2016-03-01
Source PublicationOPTICAL ENGINEERING
Volume55Issue:3
AbstractThe optimization of a primary mirror support system is one of the most critical problems in the design of large telescopes. Here, we propose a hybrid optimization methodology of variable densities mesh model (HOMVDMM) for the axial supporting design, which has three key steps: (1) creating a variable densities mesh model, which will partition the mirror into several sparse mesh areas and several dense mesh areas; (2) global optimization based on the zero-order optimization method for the support of primary mirror with a large tolerance; (3) based on the optimization results of the second step, further optimization with first-order optimization method in dense mesh areas by a small tolerance. HOMVDMM exploits the complementary merits of both the zero-and first-order optimizations, with the former in global scale and the latter in small scale. As an application, the axial support of the primary mirror of the 2.5-m wide-field survey telescope (WFST) is optimized by HOMVDMM. These three designs are obtained via a comparative study of different supporting points including 27 supporting points, 39 supporting points, and 54 supporting points. Their residual half-path length errors are 28.78, 9.32, and 5.29 nm. The latter two designs both meet the specification of WFST. In each of the three designs, a global optimization value with high accuracy will be obtained in an hour on an ordinary PC. As the results suggest, the overall performance of HOMVDMM is superior to the first-order optimization method as well as the zero-order optimization method. (C) 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
KeywordHybrid Optimization Methodology Variable Densities Mesh Model Axial Support Optimization Primary Mirror Zero-order Optimization Method First-order Optimization Method
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1117/1.OE.55.3.035105
WOS KeywordPRIMARY MIRROR ; ACTIVE OPTICS ; DEFLECTION
Indexed BySCI
Language英语
WOS Research AreaOptics
WOS SubjectOptics
WOS IDWOS:000372718100017
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/16177
Collection毫米波和亚毫米波技术实验室
Affiliation1.Chinese Acad Sci, Purple Mt Observ, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Wang, Hairen,Lou, Zheng,Qian, Yuan,et al. Hybrid optimization methodology of variable densities mesh model for the axial supporting design of wide-field survey telescope[J]. OPTICAL ENGINEERING,2016,55(3).
APA Wang, Hairen,Lou, Zheng,Qian, Yuan,Zheng, Xianzhong,&Zuo, Yingxi.(2016).Hybrid optimization methodology of variable densities mesh model for the axial supporting design of wide-field survey telescope.OPTICAL ENGINEERING,55(3).
MLA Wang, Hairen,et al."Hybrid optimization methodology of variable densities mesh model for the axial supporting design of wide-field survey telescope".OPTICAL ENGINEERING 55.3(2016).
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