康普顿光源精密调节镜架机构的设计与分析  

Design and analysis of the precision adjustment mirror bracket for Compton optical source

作　　者：刘今越[1] 任东城 张靓[1] 贾晓辉[1] 崔月盟[2] Liu Jinyue Ren Dongcheng Zhang Liang Jia Xiaohui Cui Yuemeng(School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China Tianjin Jinhang Institute of Technical Physics, Tianjin 300308, China)

机构地区：[1]河北工业大学机械工程学院,天津300130 [2]天津津航技术物理研究所,天津300308

出　　处：《红外与激光工程》2017年第2期158-163,共6页Infrared and Laser Engineering

基　　金：国家自然科学基金(51175145)

摘　　要：为弥补国内航天探测中用于探测器标定的γ源单色性差、能量覆盖范围小等缺陷,设计了一种康普顿光源精密调节镜架。该镜架由压电陶瓷电机驱动,通过柔性铰链的柔性变形传递运动,对激光入射角进行精密调节,实现激光束与高能电子束精确对撞,从而获得峰值能量连续变化的γ粒子。利用伪刚体模型理论对该镜架进行建模,分别得到了该机构沿纬度方向和经度方向的刚度模型和位移模型,结合有限元仿真,对位移理论模型和镜架中应力分布规律进行了分析,其结果验证了机构参数选择的合理性。最终得到了经度、纬度方向调节范围均为1.12°、定位精度不小于6×10-4°的精密调节镜架。To make up for the poor monochromaticity and the narrow energy range of γ particle source which is applied at the demarcation of domestic detector in aerospace probe, a precision control mirror bracket driven by the piezoelectric ceramic motor for Compton optical source was designed. In order to impinge accurately with high energy electron beam and obtain the continuous changed peak energy of the γ particle, the input angle of the laser beam was adjusted exactly with the elastic deformation of the flexure hinges. The mathematic model of stiffness and displacement in both latitude and longitude directions were developed by the principle of the pseudo-rigid-body model. Then, the displacement in both directions and the distributing rule of the stress were discussed through the finite element analysis, and the simulation results indicate that the structural parameters are fully satisfied. Finally, it was conf＇umed experimentally that the adjustable angles of the precision control mirror bracket both are 1.12° in latitudinal and longitude directions, and the positioning accuracy is not less than 6×10-4°.

关 键 词：柔性镜架 康普顿光源 精密调节 伪刚体模型 有限元分析 

分 类 号：TH744[机械工程—光学工程]