光学精密工程2017，Vol.25Issue(10)：2564-2571,8.DOI:10.3788/OPE.20172510.2564
大口径主镜的侧向定位系统
Lateral positioning system for large aperture primary mirror
摘要
Abstract
To locate accurately a large aperture primary mirror with balance weight support and Whif-fletree support in the primary mirror cell ,a lateral positioning method for the large aperture primary mirror was proposed based on the kinematic constraint .The principle of kinematic constraint was in-troduced ,a design scheme of lateral positioning system for the primary mirror was proposed including the selection of location points and the design of flexure hinges and location bases ,and then a lateral positioning system was implemented .With finite element method ,the influences of the lateral positio-ning system on the large aperture primary mirror system was analyzed in several aspects ,such as sys-tem location ,resonant frequency and mirror surface profile .As the results ,it shows that the resonant frequency of the primary mirror reaches 13 .6 Hz ,the average displacement of the primary mirror is-355 .863 nm along the Y-axis direction , and the primary mirror surface profile is uninfluenced .These parameters all meet the design requirements of this lateral positioning system .Experimental re-sults verify the engineering signification of proposed lateral positioning system on the design of sup-port and position systems of primary mirror in large aperture telescopes in the future .关键词
大口径主镜/定位/运动学约束/谐振频率/面形精度Key words
large aperture primary mirror/positioning/kinematic constraint/resonant frequency/sur-face profile分类
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原帅,张景旭,王富国,刘祥意..大口径主镜的侧向定位系统[J].光学精密工程,2017,25(10):2564-2571,8.基金项目
国家自然科学基金资助项目(No.11403023) （No.11403023）
