Design and optimization of active adjusting lateral support mechanism for 2 m telescope

Gao Zechao; Hao Liang; Wang Fuguo; Zhang Limin; Wang Rui; Fan Lei

doi:10.3788/IRLA201948.0814001

Based on a 2 m lightweight SiC primary mirror, a new type of active adjusting lateral support mechanism was designed. Firstly, the structure forms and characteristics of the commonly used lateral support mechanism were analyzed; and then the active adjusting support mechanism composed of displacement actuator, flexible hinge structure and embedded lever system was designed. Finally, the finite element analysis of the support force and the displacement of the mechanism were carried out, and the experimental platform was built to test the stiffness and the energy-saving ability of the mechanism. The experimental results show that when the supporting force is 562.55 N, the force acting on the displacement actuator in the lever structure is 97.57 N, and the stiffness and strength requirements of the displacement actuator are greatly reduced; The stroke of the displacement actuator is 0.065 mm, which is 22 times that of the supporting rod, and greatly reduces the resolution requirement of the displacement actuator; The stiffness measured by the experiment is 1 225 N/mm, which meets the design requirements. It shows that the flexible lever support system has good engineering application ability.

Design and optimization of active adjusting lateral support mechanism for 2 m telescope

1. Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;

2. University of Chinese Academy of Sciences,Beijing 100049,China

Received Date: 2019-04-28

Rev Recd Date: 2019-05-20

Publish Date: 2019-08-25

Key words:

Abstract: Based on a 2 m lightweight SiC primary mirror, a new type of active adjusting lateral support mechanism was designed. Firstly, the structure forms and characteristics of the commonly used lateral support mechanism were analyzed; and then the active adjusting support mechanism composed of displacement actuator, flexible hinge structure and embedded lever system was designed. Finally, the finite element analysis of the support force and the displacement of the mechanism were carried out, and the experimental platform was built to test the stiffness and the energy-saving ability of the mechanism. The experimental results show that when the supporting force is 562.55 N, the force acting on the displacement actuator in the lever structure is 97.57 N, and the stiffness and strength requirements of the displacement actuator are greatly reduced; The stroke of the displacement actuator is 0.065 mm, which is 22 times that of the supporting rod, and greatly reduces the resolution requirement of the displacement actuator; The stiffness measured by the experiment is 1 225 N/mm, which meets the design requirements. It shows that the flexible lever support system has good engineering application ability.

HTML

Reference (9)

[1]	Wei Mengqi, Wu Xiaoxia, Gao Zechao, et al. Performance analysis of hardpoint positioning mechanism for 4 m SiC primary mirror[J]. Infrared and Laser Engineering, 2019, 48(4):0418004. (in Chinese)魏梦琦, 吴小霞, 高则超, 等. 4 m SiC主镜硬点定位机构指标性能分析[J]. 红外与激光工程, 2019, 48(4):0418004.
[2]	Wang Shuai, Deng Yongting, Zhu Juan. Disturbance rejection control for large ground-based telescope[J]. Optics and Precision Engineering, 2017, 25(10):2627-2635. (in Chinese)王帅, 邓永停, 朱娟. 地基大口径望远镜伺服系统的抗扰动设计[J]. 光学精密工程, 2017, 25(10):2627-2635.
[3]	Zhao Yongzhi, Shao Liang, Ming Ming, et al. Assembly for large aperture telescope primary mirror support system[J]. Infrared and Laser Engineering, 2017, 46(9):0918003. (in Chinese)赵勇志, 邵亮, 明名, 等. 大口径望远镜主镜支撑系统装调[J]. 红外与激光工程, 2017, 46(9):0918003.
[4]	Wu Xiaoxia. Design research on tangent lateral support of thin meniscus mirror[J]. Journal of Changchun University of Science and Technology(Natural Science Edition), 2011, 34(1):53-56. (in Chinese)吴小霞. 弯月薄镜的切向侧支撑设计研究[J]. 长春理工大学学报(自然科学版), 2011, 34(1):53-56.
[5]	Gao Zechao, Wang Fuguo, Ding Liang, et al. Design and optimization of edge tangential shear support on 2 m SiC lightweight primary mirror[J]. Science Technology and Engineering, 2018, 18(27):130-134. (in Chinese)高则超, 王富国, 丁良, 等. 2 m级轻量化主镜的边缘切向剪切支撑设计与优化[J]. 科学技术与工程, 2018, 18(27):130-134.
[6]	Liu Tingyu. Reseach on flexure mounts for a 1.23 m SiC telescope[D]. Changchun:Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 2012. (in Chinese)刘婷毓. 1.23 m SiC轻量化主镜柔性支撑技术的研究[D]. 长春:中国科学院长春光学精密机械与物理研究所, 2012.
[7]	Shao Liang. Research on flexure lateral support mechanism design applied to primary mirror of telescope[J]. Journal of Changchun University of Science and Technology(Natural Science Edition), 2013, 36(6):15-19. (in Chinese)邵亮. 望远镜主镜柔性侧支撑机构设计研究[J]. 长春理工大学学报(自然科学版), 2013, 36(6):15-19.
[8]	Xin Hongbing, Zheng Weizhi, Zhao Fu. Research on flexible hinges[J]. Optics and Precision Engineering, 2003, 11(1):89-93. (in Chinese)辛洪兵, 郑伟智, 赵罘. 新弹性铰链研究[J]. 光学精密工程, 2003, 11(1):89-93.
[9]	Yang Xue, Zhang Xiaohui, He Xu. Optimization of rear end support structure for large aperture space telescope[J]. Information Technology in China, 2018, 14(34):91-93. (in Chinese)杨雪, 张晓辉, 何煦. 大口径空间望远镜后端支撑结构优化[J]. 中国科技信息, 2018, 14(34):91-93.

Design and optimization of active adjusting lateral support mechanism for 2 m telescope

doi: 10.3788/IRLA201948.0814001

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Article Metrics

Related

Proportional views