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
Corresponding AuthorZhang, Hai-Yan(
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
Indexed BySCI
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000430282700012
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
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.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zhang, Hai-Yan]'s Articles
[Wu, Ming-Chang]'s Articles
[Yue, You-Ling]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhang, Hai-Yan]'s Articles
[Wu, Ming-Chang]'s Articles
[Yue, You-Ling]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhang, Hai-Yan]'s Articles
[Wu, Ming-Chang]'s Articles
[Yue, You-Ling]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.