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Research on application of high precision angle encoder in Antarctic telescope
Bo Xu; Bozhong Gu; Fujia Du; Shihai Yang
2013-08-30
Source PublicationAdvanced Materials Research
Volume744
Pages511-516
Conference Date2013-6-20
Conference PlaceWuhan, Hubei, China
PublisherTrans Tech Publications, Switzerland
Abstract
The extremely low temperature in Antarctic inland area has taken a new challenge for
telescope design and develop, the adaptability of components and parts in telescope for theenvironment close to space. The application of high accuracy encoder is the only way to improve theaccuracy of tracking, however, due to the temperature requirement, there is no application of encoder under such a low temperature ever since. To realize the high accuracy of tracking and steering in telescope, high accuracy encoders must be applied in it. Based on the analysis of influence on encoder caused by temperature, an initial thermal control measure is carried out. Secondly, the thermal control measure is optimized with the method that consists of CFD simulations and experiments.

Finally, an effective thermal control measure is applied on the second telescope of the 3 Antarctic Schmidt Telescopes (AST3). By the comparison of normal temperature experiment and low temperature experiment, the encoder can reach a temperature of about 25 degrees when it is under the circumstance of -80 degrees after the thermal control works, and the power consumes by the thermal control is less than 6W. The experiment result indicates that the thermal control measure can fit the requirement of temperature that ranges from -10 degrees to 80 degrees and the lowly consuming power requirement, the encoder can reliably work in low temperature with the thermal control measure works.
KeywordAntarctic Telescope Angle Encoder Thermal Control Cfd
Subject Area南极望远镜 ; 天文技术与方法
Document Type会议论文
Identifierhttp://ir.niaot.ac.cn/handle/114a32/730
Collection中国科学院南京天文光学技术研究所_会议论文
望远镜工程中心_会议论文
Recommended Citation
GB/T 7714
Bo Xu,Bozhong Gu,Fujia Du,et al. Research on application of high precision angle encoder in Antarctic telescope[C]:Trans Tech Publications, Switzerland,2013:511-516.
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