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Research on the panel adjustment method of an active main reflector for a large radio telescope
Sun, Zheng-Xiong1; Wang, Jin-Qing1,2,3; Yu, Lin-Feng1; Gou, Wei1; Wang, Guang-Li1,4
2021-03-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume21Issue:2Pages:8
AbstractThe surface accuracy of a large parabolic antenna is an important indicator to evaluate the quality of the antenna. It not only directly affects the antenna's aperture efficiency, thereby determining the shortest wavelength that the antenna can work, but also affects the main lobe width and side lobe structure of the antenna pattern. Microwave holography is an important method for parabolic antenna profile detection. In this article we adopt a new algorithm to adjust the panels for the large radio telescope with an active main reflector through the TM65 m antenna's aperture phase profile. The panels of the TM65 m radio telescope is in a radial pattern with 14 rings. Each corner of the panel is fixed on the screw of the actuator to move up and down, and the adjacent corners of the four panels share an actuator. We use the method of plane fitting to calculate the adjustment value of every panel's corner. But one actuator, which simultaneously controls the common corner of the adjacent panels, will have different adjustment values according to the different plane fitting equation based on adjacent panels. In this paper, the adjustment value of the adjacent panels'crosspoints are constrained to be equal to the constraint condition to calculate each actuator's adjustment value of the TM65 m radio telescope. Through multiple adjustments and application of the new algorithms, the accuracy of the TM65 m antenna reflector profile has been improved from the original 0.28 mm to the current 0.19 mm.
Keywordmicrowave holography radio astronomy surface deviation least squares method
DOI10.1088/1674-4527/21/2/38
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000631666500001
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/78818
Collection中国科学院国家天文台
Corresponding AuthorSun, Zheng-Xiong
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China
3.Shanghai Key Lab Space Nav & Positioning Tech, Shanghai 430074, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Sun, Zheng-Xiong,Wang, Jin-Qing,Yu, Lin-Feng,et al. Research on the panel adjustment method of an active main reflector for a large radio telescope[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2021,21(2):8.
APA Sun, Zheng-Xiong,Wang, Jin-Qing,Yu, Lin-Feng,Gou, Wei,&Wang, Guang-Li.(2021).Research on the panel adjustment method of an active main reflector for a large radio telescope.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,21(2),8.
MLA Sun, Zheng-Xiong,et al."Research on the panel adjustment method of an active main reflector for a large radio telescope".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 21.2(2021):8.
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