EMC design for actuators in the FAST reflector
文献类型：期刊论文
| 作者 | Zhang, Hai-Yan1,2; Wu, Ming-Chang1,2; Yue, You-Ling1,2; Gan, Heng-Qian1,2; Hu, Hao1; Huang, Shi-Jie1 |
| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2018-04-01 |
| 卷号 | 18期号:4页码:6 |
| 关键词 | radio telescope active reflector: actuator electromagnetic compatibility |
| ISSN号 | 1674-4527 |
| DOI | 10.1088/1674-4527/18/4/48 |
| 通讯作者 | Zhang, Hai-Yan(hyzhang@nao.cas.cn) |
| 英文摘要 | An 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. |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000430282700012 |
| 出版者 | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/22418]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Zhang, Hai-Yan |
| 作者单位 | 1.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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：紫金山天文台
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