激光发射系统轴头箱结构分析与优化  

Structure Analysis and Optimization of Shaft Head Box of Laser Emission System

作　　者：娄家润 邵帅[1] Lou Jiarun;Shao Shuai(Changchun Institute of Optic,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所,长春130033

出　　处：《机电工程技术》2024年第6期170-173,共4页Mechanical & Electrical Engineering Technology

基　　金：中国科学院重大创新项目(E31371X6CZ00)。

摘　　要：为提高轴头箱刚度,对激光发射系统的轴头箱进行结构优化。基于现有轴头箱结构,在光机装调完毕后,安装侧盖时会导致系统视轴与光轴之间的角度差变大,导致不满足使用要求。根据有限元法,对负载条件下的轴头箱进行静力学分析,得到其变形情况。相机箱体变形情况影响电视视轴指向,其角度变化可以直接用三角函数计算。反射镜法向量也会产生变化,采用最小二乘法对反射镜反射面的节点数据进行拟合,通过拟合数据获得反射镜的法向量,计算其光轴角度变化情况。通过优化轴头箱结构形式,改变轴头箱结构与箱体盖板之间的重量分配,减少装调完毕后需要增加的负载重量,从而改善跟瞄视轴与激光发射轴平行度的稳定性。根据有限元分析结果,优化后的轴头箱结构,安装侧盖对视轴与光轴之间角度差影响不超过1″。通过实验证明,优化后的轴头箱结构具有更好的刚度。In order to improve the stiffness of the shaft head box,the structure of the shaft head box of the laser emission system is optimized.Based on the existing axle head box structure,after the installation of the optical machine,the angle difference between the system visual axis and the optical axis becomes larger when the side cover is installed,which meets the use requirements.According to the finite element method,the static analysis of the axle head box under load condition is carried out to obtain its deformation.The deformation of the camera box affects the direction of the TV visual axis,and its angle change can be calculated directly by trigonometric function.The mirror normal vector also changes.The least square method is used to fit the node data of the reflector surface,and the normal vector of the reflector is obtained by fitting the data,and the change of its optical axis Angle is calculated.By optimizing the structure of the shaft head box,the weight distribution between the shaft head box structure and the box cover plate is changed to reduce the load weight that needs to be increased after installation and adjustment,so as to improve the stability of the parallelism between the tracking shaft and the laser emission shaft.According to the results of finite element analysis,the influence of the installation side cover on the angle difference between the visual shaft and the optical shaft is less than 1".The results show that the optimized structure has better stiffness.

关 键 词：跟瞄转台 视轴平行 结构优化 有限元 

分 类 号：TH745[机械工程—光学工程]