摘要
针对极大望远镜宽视场光谱仪准直镜位姿调整机构的位姿机构调节误差问题,采用多体运动学理论分析机构运动学关系,利用矩阵微分法建立该调节机构误差模型,分析加工和装配误差对准直镜调节位姿误差的影响,并通过统计学软件SPASS对调节机构误差进行仿真研究。分析计算结果表明,根据现有设计和导轨滑台的选型及装配工艺,机构的装配和定位精度可以满足准直镜调节精度的需求。利用运动学原理对光学系统姿态调节系统误差分析方法可对镜面调节机构误差进行预判,提前获取调节机构调节精度,对光学仪器后期动态调节等工作具有指导意义。
In order to identify the error of the collimator mirror’s pose-adjustment mechanism of the extremely large telescope’s wide-field spectrometer,the multi-body kinematic theory is adopted to analyze the kinematic relationship.The error model of the pose-adjustment mechanism is worked out;the pose error is quantified with all original errors,and the simulation analysis is conducted on the pose error with the aid of the statistical software of SPASS.The result shows that based on the guide’s slide table and assembly process,the accuracy in the mechanism assembly and positioning ensures that the collimator mirror is adjusted accurately.The error analysis based on the multi-body kinematic theory helps to forecast whether the poseadjustment mechanism is adjusted accurately,and the systematic error analysis provides reference for the dynamic adjustment of optical instrument.
出处
《机械设计》
CSCD
北大核心
2020年第1期43-47,共5页
Journal of Machine Design
基金
国家自然科学基金资助项目(11603054,U1831108,11503059)
江苏省自然科学基金资助项目(BK20191507).
关键词
极大望远镜
宽视场光谱仪
准直镜调节机构
误差分析
多体运动学
extremely large telescope
wide-field spectrometer
collimator mirror’s adjustment mechanism
error analysis
multi-body kinematic theory
