Calibration Mechanism Design and Stiffness Analysis

2019 4th International Conference on Mechanical, Manufacturing, Modeling and Mechatronics;2019 4th International Conference on Design Engineering and Science

工业技术（总论）;机械制造

Xia, Siyu^1 ; Shi, Jinfeng^1 ; Ren, Guorui^1 ; Li, Chuang^1

Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 17 Xinxi Road, China^1

关键词: Dynamic environments;    First order;    Mechanism design;    Moving parts;    Space cameras;    Stiffness analysis;    Test data;    Vibration test;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/520/1/012014/pdf
DOI  :  10.1088/1757-899X/520/1/012014

学科分类：工业工程学

来源: IOP

【 摘 要 】

According to the optical requirements of a space camera, a calibration mechanism in the form of a worm gear driven cantilever beam is designed, and a stop is added at the cantilever beam's end for limiting its amplitude. A detailed finite element model considering the clearance between moving parts in the mechanism and the preload of bearing is established using MSC.Patran & Nastran. By comparing the vibration test and analysis results, the stiffness and the dynamic environment adaptability of the mechanism is investigated and the first-order resonant frequency of the calibration mechanism is much larger than 100Hz which is high enough for the telescope's structure. Finally, the result shows that the error between the analysis result and the test data is within 10%, and it is verified that the calibration mechanism scheme has higher stiffness.