Real-time Closed-loop Active Surface Technology of a Large Radio Telescope

doi:10.1088/1538-3873/ac32af

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	Real-time Closed-loop Active Surface Technology of a Large Radio Telescope
	Zhang, Yong 1,2; Li, Guoping 1,2; Zhou, Guohua 1,2; Lu, Qishuai 1,2; Zuo, Heng 1,2; Wang, You 1,2; Zhang, Hui 1,2; Li, Aihua 1,2; Zhang, Chao 1,2; Li, Yeping 1,2
刊名	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
	2022
卷号	134 期号:1031 页码:16
ISSN号	0004-6280
DOI	10.1088/1538-3873/ac32af
通讯作者	Zuo, Heng(hengz@niaot.ac.cn)
英文摘要	The surface accuracy of a large radio telescope's primary reflector is easily affected by gravity and temperature change during observations. An active surface system is crucial to ensure the regular operation and high-quality data output of the radio telescope. We propose a real-time closed-loop active surface system including two components. The first component, a new type of photoelectric edge sensor, detects the angle change of the adjacent panels. The second component, the displacement actuator, adjusts the panels' position and posture to compensate for the angle changes. So, over the entire observation, the closed-loop surface control system with these two components could actively maintain the primary reflector's accuracy in real time. Using this approach, we constructed an experimental active surface system for the Xinjiang Qitai 110 m Radio Telescope (QTT) to test the maintenance of the surface accuracy. The angle measurement accuracy is better than 0.'' 2, and the positioning accuracy of the displacement actuator could achieve +/- 15 mu m over the whole 50 mm stroke. The preliminary test results show that the accuracy requirements of the QTT's primary reflector surface can be met using the active surface system we propose.
资助项目	National Natural Science Foundation of China[U1931207] ; National Natural Science Foundation of China[U2031207] ; National Natural Science Foundation of China[12073053] ; National Natural Science Foundation of China[U1931126] ; National Natural Science Foundation of China[1331204] ; National Key Basic Research Program of China[2015CB857100] ; National Development and Reform Commission
WOS关键词	FOCUS ; SYSTEM
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000741605000001
资助机构	National Natural Science Foundation of China ; National Key Basic Research Program of China ; National Development and Reform Commission
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/4438]
专题	研究单元未命名
通讯作者	Zuo, Heng
作者单位	1.Chinese Acad Sci, Nanjing Inst Astron Opt & Technol, Natl Astron Observ, Nanjing 210042, Peoples R China 2.Chinese Acad Sci, Nanjing Inst Astron Opt & Technol, Key Lab Astron Opt & Technol, Nanjing 210042, Peoples R China 3.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yong,Li, Guoping,Zhou, Guohua,et al. Real-time Closed-loop Active Surface Technology of a Large Radio Telescope[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,2022,134(1031):16.
APA	Zhang, Yong.,Li, Guoping.,Zhou, Guohua.,Lu, Qishuai.,Zuo, Heng.,...&Wang, Na.(2022).Real-time Closed-loop Active Surface Technology of a Large Radio Telescope.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,134(1031),16.
MLA	Zhang, Yong,et al."Real-time Closed-loop Active Surface Technology of a Large Radio Telescope".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC 134.1031(2022):16.