大口径透镜姿态调整机构的支承分布设计  

Design of support distribution for attitude-adjusting mechanism of large lens

作　　者：章亚男[1] 沈丽丽[1] 沈卫星[2] 陈明仪[1] 

机构地区：[1]上海大学机电工程与自动化学院,上海200072 [2]中国科学院上海光学精密机械研究所,上海201800

出　　处：《光学精密工程》2010年第12期2624-2632,共9页Optics and Precision Engineering

基　　金：国家863高技术研究发展计划资助项目(No.2007AA804229-1);上海市教委"机械电子工程"创新团队资助项目

摘　　要：为了设计大口径透镜姿态调整机构,研究了三顶三拉调平结构布置方式的调节性能及其对受力变形和光束质量的影响。采用几何方法,得出了三顶三拉结构在任意三角形布置下升高量与调整角度变化的关系,定义了角度调整的相关系数;利用有限元分析软件分析了3类支承点布置情况下调节平板的变形情况。分析结果表明,三顶三拉调整机构具有调整量可计算的特点,当调节平板的尺寸为580 mm×570 mm×20 mm,采用等腰三角形支承点布置方式时,重力引起的最大变形为12.51μm。对采用了等腰三角形三顶三拉结构的透镜姿态调整机构进行了装校调试及打靶实验,结果证实了该布点方式对姿态调整的有效性和调整完成后精度的稳定性。To design an attitude adjusting mechanism for large lenses,the adjusting characteristics of a three-pod adjusting structure and its effect on the force and deformation were analyzed.On the basis of the geometrical method,the relationship between the length of each pod and the plate angle variation was obtained under the arbitrary triangle layout of 3-pod adjusting structure,and the correlation coefficient was thus defined.Furthermore,the Finite Element Method（FEM） was used to analyse the deformation of the adjusting plate with three types of support layouts.The results show that the adjusting values of 3-pod mechanism can be calculated.For a plate with the size of 580 mm×570 mm×20 mm,the maximum deformation caused by gravity could be 12.51 μm while the isoscele triangle support layout is adopted.Finally,the attitude adjusting mechanism based on the 3-pod isoscele triangle support layout was calibrated and adjusted,the results prove that it is effective in attitude adjusting and accuracy stability in target-firing experiments.

关 键 词：透镜 调平机构 调整性能 支承分布 

分 类 号：TH703[机械工程—仪器科学与技术] TH115[机械工程—精密仪器及机械]