KMS of Xinjiang Astronomical Observatory, CAS
| Light-tracing based surface deformation measurement strategy for large radio telescopes | |
Zhang, Zihan1; Yang, Dejin2,3; Ye, Qian3; Wang, Na4
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| 2024-12-01 | |
| Source Publication | EXPERIMENTAL ASTRONOMY
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| ISSN | 0922-6435 |
| Volume | 58Issue:3Pages:11 |
| Contribution Rank | 4 |
| Abstract | 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. |
| Keyword | Radio telescope Main reflector deformation Geometric-optical measurement |
| DOI | 10.1007/s10686-024-09960-w |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | FOCUS |
| Funding Project | National Key Basic Research and Development Program of China[2021YFC2203501] ; National Natural Science Foundation of China[U1931137] |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:001335600100001 |
| Publisher | SPRINGER |
| Funding Organization | National Key Basic Research and Development Program of China ; National Natural Science Foundation of China |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/7066 |
| Collection | 110米口径全可动射电望远镜（QTT）_技术成果 |
| Corresponding Author | Ye, Qian |
| Affiliation | 1.Shanghai Jiao Tong Univ, Sch Mech Engn, Shanghai 200240, Peoples R China 2.Chongqing Jiaotong Univ, Sch Civil Engn, Chongqing 400074, Peoples R China 3.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 4.Chinese Acad Sci, Xinjiang Observ, Urumqi 830011, Xinjiang, Peoples R China |
| Recommended Citation 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. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Zhang-2024-Light-tra（2387KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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