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An active surface upgrade for the Delingha 13.7-m radio telescope
Dehua Yang; Yong Zhang; Guohua Zhou; Aihua Li; Kunxin Chen; Zhenchao Zhang; Guoping Li; Yingxi Zuo; Ye Xu
2012-09-17
Source PublicationGround-based and Airborne Telescopes IV
Volume8444
Issue8444
PagesVol.8444 4B-1-11
Conference Date2012-7-1
Conference PlaceAmsterdam, Netherlands
Funding OrganizationThe International Society for Optical Engineering
PublisherSPIE
Abstract
An upgrade program is proposed for the Delingha 13.7-m radio telescope to implement active surface for multi-beam observation at 3 mm wavelength. The upgrade involves three critical development aspects. One is the displacement actuator, which must fit the existing position, space and connections of the panels and backup structure, meanwhile, must be as compact and lightweighted as possible. The second is that a new sub-reflector is necessitated by the multi-beam observation, where a new hyperbolic surface figure is optimized. The third, more crucial and difficult, is to realize active control of the actuators and real-time closed-loop of the full active surface. This paper is to present the progress of the development work, test and experiments associated with the three areas. With one of the spare panels of the telescope, an experiment system is carried out with six sets of actuator and control electronics. Another experiment system of a novel laser-based closed-loop measurement concept is also conducted with four smaller dummy panels. Both experiment setups have output expected results and further experiments are going on with them. In this paper, based on the two experiments, we will describe the special design and test of the actuator, including the design of its special mounting and
connecting mechanisms. The design and manufacture and measurement of the new hyperbolic sub-reflector will be detailed as well as the principle, simulation and realization of the laser-based measurement system. Besides, the control strategy of the large scale use of the hundreds of actuators and EMI suppression are also covered.
KeywordRadio Telescope Active Surface Actuator Control Closed-loop Measurement
Subject Area射电望远镜 ; 主动光学 ; 自动控制
Document Type会议论文
Identifierhttp://ir.niaot.ac.cn/handle/114a32/639
Collection中国科学院南京天文光学技术研究所_会议论文
望远镜新技术研究室_会议论文
Recommended Citation
GB/T 7714
Dehua Yang,Yong Zhang,Guohua Zhou,et al. An active surface upgrade for the Delingha 13.7-m radio telescope[C]:SPIE,2012:Vol.8444 4B-1-11.
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