Hybrid optimization methodology of variable densities mesh model for the axial supporting design of wide-field survey telescope

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 毫米波和亚毫米波技术实验室

	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
刊名	OPTICAL ENGINEERING
	2016-03-01
卷号	55 期号:3
关键词	hybrid optimization methodology variable densities mesh model axial support optimization primary mirror zero-order optimization method first-order optimization method
英文摘要	The 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)
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Optics
研究领域[WOS]	Optics
关键词[WOS]	PRIMARY MIRROR ; ACTIVE OPTICS ; DEFLECTION
收录类别	SCI
语种	英语
WOS记录号	WOS:000372718100017
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/16177]
专题	紫金山天文台_毫米波和亚毫米波技术实验室
作者单位	1.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
推荐引用方式 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).