摘要
为设计得到满足车载运输及工况使用要求的车载离轴望远镜系统,以φ440 mm车载离轴反射镜支撑结构为研究对象,分析了影响车载离轴反射镜面型精度的主要因素;确定了单点中心支撑的支撑方案,并利用UG软件设计了反射镜的支撑结构,得到了三维模型;采用有限元仿真的方法,使用Patran软件分别对反射镜支撑结构添加沿X、Y、Z三个方向的重力载荷作用,对反射镜组件进行静力学分析与模态分析;并针对车载使用下的温度环境载荷,在仿真环境中对反射镜支撑结构添加60℃温度场载荷,分析反射镜组件温度变形情况;分析结果表明,在3个方向重力载荷和60℃温度场载荷作用下,采用单点支撑方式的反射镜组件的面型精度RMS值优于λ/30,PV值优于λ/6(λ=632.8 nm);反射镜组件一阶模态为292.17 Hz,大于技术要求的200 Hz,最终结果表明设计的反射镜单点支撑结构可用于车载使用环境。
In order to design a vehicle mounted off-axis telescope system that meets the requirements of vehicle transportation and working conditions,taking the main mirror support structure of theφ440 mm vehicle-mounted off-axis telescope as the research object,the main factors affecting the surface accuracy of the vehicle-mounted off-axis telescope were analyzed,and the influence of the single-point and multipoint support schemes of the telescope on the surface of the telescope was theoretically analyzed and determined,the support scheme using single-point support was adopted,and the supporting structure of the mirror was designed by UG software,the three-dimensional model was obtained.Using the finite element simulation method and Patran software,the gravity loads along the X,Y and Z directions were added to the mirror support structure,and the static analysis and modal analysis of the mirror assembly were carried out.According to the temperature environment load under vehicle use,60℃temperature field load was added to the mirror support structure in the simulation environment,and the temperature deformation of the mirror assembly was analyzed.The analysis results show that under the action of gravity load in three directions and 60℃temperature field load,the surface accuracy of the telescope assembly using single-point support is better thanλ/30 and PV value is better thanλ/6(λ=632.8)nm;the fundamental frequency of the telescope component is 292.17 Hz,which is greater than the technical requirement of 200 Hz;the final result shows that the single-point supporting structure of the telescope designed can be used in a vehicle-mounted environment.
作者
王连强
周頔
高明辉
Wang Lianqiang;Zhou Di;Gao Minghui(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China)
出处
《机电工程技术》
2022年第4期35-37,223,共4页
Mechanical & Electrical Engineering Technology
基金
国家重点研发计划项目(2018YFB0504600,2018YFB0504603)
2020年省预算内基本建设资金项目(编号:2020C022-2)
吉林省科技发展计划项目(编号:20210201008GX)。
关键词
车载离轴反射镜
支撑结构
单点中心支撑
vehicle-mounted telescope
supporting structure
single-point support
作者简介
第一作者:王连强(1993-),男,硕士,研究实习员,研究领域为光学支撑结构设计,已发表论文2篇;通讯作者:周頔(1994-),男,硕士,研究实习员,研究领域为光学支撑结构设计,已发表论文5篇。
