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Light-tracing based surface deformation measurement strategy for large radio telescopes

文献类型：期刊论文

作者Zhang, Zihan3; Yang, Dejin2,4; Ye, Qian2; Wang, Na1
刊名EXPERIMENTAL ASTRONOMY
出版日期2024-12-01
卷号58期号:3页码:11
关键词Radio telescope Main reflector deformation Geometric-optical measurement
ISSN号0922-6435
DOI10.1007/s10686-024-09960-w
产权排序4
英文摘要With the increasing aperture as well as the observation frequency of radio telescopes in the current period, the deformation caused by time-varying loads such as temperature and wind has been emphasized. Existing methods for measuring deformations often fall short in meeting the demands of full attitude coverage, quasi-real-time response, and high accuracy. This study introduces a novel geometric-optical measurement approach based on light-tracing. Diverging from traditional methods, this approach doesn't directly measure the surface deformation of the main reflector. Instead, it creates a more easily measurable variable and establishes a mapping relationship between this variable and the main reflector deformation. In this innovative scheme, multiple laser modules are strategically positioned on the main reflector, treating the sub reflector as a spot projection surface. When the panel is displaced, the spot on the projection surface will follow and be displaced. In practice, the main reflector deformation can be solved by recording the position change of the light spots on the projection surface and utilizing the inverse reconstruction model. Besides, effective strategies are proposed to improve the robustness of the scheme. Next, the accuracy and real-time performance of the proposed method are verified through simulations and experiments. Results indicate that the proposed approach presents a fresh perspective to enhance the efficiency and precision of deformation measurements for large-aperture antennas.
WOS关键词FOCUS
资助项目National Key Basic Research and Development Program of China[2021YFC2203501] ; National Natural Science Foundation of China[U1931137]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001335600100001
出版者SPRINGER
资助机构National Key Basic Research and Development Program of China ; National Natural Science Foundation of China
源URL[http://ir.xao.ac.cn/handle/45760611-7/7065]  
专题新疆天文台_110米口径全可动射电望远镜（SmART）_技术成果
通讯作者Ye, Qian
作者单位1.Chinese Acad Sci, Xinjiang Observ, Urumqi 830011, Xinjiang, Peoples R China
2.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
3.Shanghai Jiao Tong Univ, Sch Mech Engn, Shanghai 200240, Peoples R China
4.Chongqing Jiaotong Univ, Sch Civil Engn, Chongqing 400074, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Zihan,Yang, Dejin,Ye, Qian,et al. Light-tracing based surface deformation measurement strategy for large radio telescopes[J]. EXPERIMENTAL ASTRONOMY,2024,58(3):11.
APA Zhang, Zihan,Yang, Dejin,Ye, Qian,&Wang, Na.(2024).Light-tracing based surface deformation measurement strategy for large radio telescopes.EXPERIMENTAL ASTRONOMY,58(3),11.
MLA Zhang, Zihan,et al."Light-tracing based surface deformation measurement strategy for large radio telescopes".EXPERIMENTAL ASTRONOMY 58.3(2024):11.

入库方式： OAI收割

来源：新疆天文台

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