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Secondary mirror supporting structure for 1.2 m telescope
Zhao, H.-C.; J.-X. Zhang; F. Yang and Q.-C. An
2017
Source PublicationGuangxue Jingmi Gongcheng/Optics and Precision Engineering
Volume25Issue:10
AbstractA reasonable supporting structure between primary mirror and secondary mirror for a 1.2 m telescope was fabricated to meet its requirement for stiffness and the bandwidth of servo system. A four-vane spider effecting on the primary obstruction and secondary mirror stiffness was explored. The key parameters for the four-vane spider were selected by dynamic molding. Then, a finite element model was established in the ANSYS to perform static analysis and modal analysis. Finally, the modal analysis method was used to test the designed support structure. The finite element analysis shows that the designed structure effected by gravity induces about 0.004 2 coma while the telescope points to the horizon, and the first-order modal frequency is about 57.2 Hz. The modal analysis indicates that the first-order resonance frequency is up to 54.1 Hz, which is in agreement with that of finite element analysis. Experimental results and FEA results are compared, and it shows that it is difficult to extract the modal when the vibration magnitude on the vane is smaller and obtained results are little smaller than that of the FEA, in which the maximum relative error is less than 7%. In conclusion, this design is not only a fewer obstruction but also an excellent stiffness, meeting the requirement of telescopes. 2017, Science Press. All right reserved.
Indexed Byei
Language中文
Document Type期刊论文
Identifierhttp://ir.ciomp.ac.cn/handle/181722/59474
Collection中科院长春光机所知识产出
Recommended Citation
GB/T 7714
Zhao, H.-C.,J.-X. Zhang,F. Yang and Q.-C. An. Secondary mirror supporting structure for 1.2 m telescope[J]. Guangxue Jingmi Gongcheng/Optics and Precision Engineering,2017,25(10).
APA Zhao, H.-C.,J.-X. Zhang,&F. Yang and Q.-C. An.(2017).Secondary mirror supporting structure for 1.2 m telescope.Guangxue Jingmi Gongcheng/Optics and Precision Engineering,25(10).
MLA Zhao, H.-C.,et al."Secondary mirror supporting structure for 1.2 m telescope".Guangxue Jingmi Gongcheng/Optics and Precision Engineering 25.10(2017).
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