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EMC design for actuators in the FAST reflector
Zhang, Hai-Yan1,2; Wu, Ming-Chang1,2; Yue, You-Ling1,2; Gan, Heng-Qian1,2; Hu, Hao1; Huang, Shi-Jie1
2018-04-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume18Issue:4Pages:6
Corresponding AuthorZhang, Hai-Yan(hyzhang@nao.cas.cn)
AbstractAn active reflector is one of the three main innovations incorporated in the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The deformation of such a huge spherically shaped reflector into different transient parabolic shapes is achieved by using 2225 hydraulic actuators which change the position of the 2225 nodes through the connected down tied cables. For each different tracking process of the telescope, more than 1/3 of these 2225 actuators must be in operation to tune the parabolic aperture accurately and meet the surface error restriction. This means that some of these actuators are inevitably located within the main beam of the receiver, and Electromagnetic Interference (EMI) from the actuators must be mitigated to ensure the scientific output of the telescope. Based on the threshold level of interference detrimental to radio astronomy described in ITU-R Recommendation RA. 769 and EMI measurements, the shielding efficiency (SE) requirement for each actuator is set to be 80 dB in the frequency range from 70 MHz to 3 GHz. Therefore, Electromagnetic Compatibility (EMC) was taken into account in the actuator design by measures such as power line filters, optical fibers, shielding enclosures and other structural measures. In 2015, all the actuators had been installed at the FAST site. Till now, no apparent EMI from the actuators has been detected by the receiver, which demonstrates the effectiveness of these EMC measures.
Keywordradio telescope active reflector: actuator electromagnetic compatibility
DOI10.1088/1674-4527/18/4/48
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000430282700012
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22419
Collection中国科学院紫金山天文台
Corresponding AuthorZhang, Hai-Yan
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210034, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Hai-Yan,Wu, Ming-Chang,Yue, You-Ling,et al. EMC design for actuators in the FAST reflector[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2018,18(4):6.
APA Zhang, Hai-Yan,Wu, Ming-Chang,Yue, You-Ling,Gan, Heng-Qian,Hu, Hao,&Huang, Shi-Jie.(2018).EMC design for actuators in the FAST reflector.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,18(4),6.
MLA Zhang, Hai-Yan,et al."EMC design for actuators in the FAST reflector".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 18.4(2018):6.
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