NIAOT OpenIR  > 期刊论文
Real-time Closed-loop Active Surface Technology of a Large Radio Telescope
Zhang Y(张勇); Li GP(李国平); Zhou GH(周国华); Lu QS(陆启帅); Zuo H(左恒); Wang Y(王佑); Zhang H(张惠); Li AH(李爱华); Zhang C(张超); Li YP(李烨平); Wu XH(吴旭浩); Li H(李浩); Hu TZ(胡天柱)
2022-01-11
Source PublicationPublications of the Astronomical Society of the Pacific
Volume134Issue:1031Pages:015003-1-16
Abstract

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 02, and the positioning accuracy of the displacement actuator could achieve ±15 μm 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.

KeywordAstronomical instrumentation Astronomical techniques Ground telescopes Radio telescopes Experimental techniques Astronomical optics
Subject Area天文技术与方法
Document Type期刊论文
Identifierhttp://ir.niaot.ac.cn/handle/114a32/1981
Collection期刊论文
中国科学院南京天文光学技术研究所知识成果
Affiliation南京天文光学技术研究所
Recommended Citation
GB/T 7714
Zhang Y,Li GP,Zhou GH,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):015003-1-16.
APA Zhang Y.,Li GP.,Zhou GH.,Lu QS.,Zuo H.,...&Hu TZ.(2022).Real-time Closed-loop Active Surface Technology of a Large Radio Telescope.Publications of the Astronomical Society of the Pacific,134(1031),015003-1-16.
MLA Zhang Y,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):015003-1-16.
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