摘要
为了研究极端温度环境对跟踪望远镜指向精度的影响,利用ANSYS Workbench有限元分析软件,建立跟踪望远镜机架的有限元模型,通过稳态热分析,得到高、低温环境中机架在太阳辐射、空气对流、电器件产热及热传导作用下的温度场分布;通过结构静力学分析,得到机架在以上温度场作用下的热变形。分析结果表明在高、低温工况下,机架轴系的偏斜角均小于30″,在误差允许范围内。极端温度环境中跟踪望远镜机架的方位转轴、俯仰转轴及光路视准轴基本没有发生偏斜,跟踪望远镜的指向精度几乎没有受到影响。
In order to study the effect of extreme temperature environment on pointing accuracy of tracking telescope,the finite element analysis software ANSYS Workbench is used to establish finite element model of tracking telescope frame.By steady-state thermal analysis,the temperature field distribution of frame is obtained under the action of solar radiation,air convection,heat generation of electric device,and heat conduction in high and low temperature environment,while the thermal deformation of frame under the action of the corresponding temperature field is obtained by static structural analysis.The results show that the slant angle of the frame set of axes are all less than 30″ under high and low temperature working condition,which is within the allowable error range.It is indicated that the azimuthal rotating axis,pitching rotating axis and collimation axis of tracking telescope frame do not deflect basically,and pointing accuracy of tracking telescope is almost unaffected in extreme temperature environment.
作者
董丽媛
张巳龙
何枫
秦来安
谭逢富
靖旭
张守川
侯再红
吴毅
DONG Liyuan;ZHANG Silong;HE Feng;QIN Laian;TAN Fengfu;JING Xu;ZHANG Shouchuan;HOU Zaihong;Wu Yi(School of Environmental Science and Optoelectronic Technology,University of Science andTechnology of China,Hefei 230031,China;Key Laboratory of Atmospheric Optics,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei 230031,China)
出处
《量子电子学报》
CAS
CSCD
北大核心
2019年第4期408-415,共8页
Chinese Journal of Quantum Electronics
基金
国家自然科学基金,41405014~~
关键词
几何光学
跟踪望远镜
对流换热
稳态热分析
结构静力学分析
geometrical optics
tracking telescope
convection heat transfer
steady-state thermal analysis
static structural analysis
