射电望远镜主动面促动器的电磁辐射分析  

Analysis of the Electromagnetic Radiation of Actuators Applied to the Active Surface System of the Radio Telescope

作　　者：张鑫 项斌斌[2] 成龙[1] 彭海波[1] 王艳玲[1] ZHANG Xin;XIANG Bin-bin;CHENG Long;PENG Hai-bo;WANG Yan-ling(Xi'an Microelectronic Technology Institute,Xi'an 710119,China;Xinjiang Astronomical Observatory,Chinese Academy of Sciences,Urumchi 830011,China)

机构地区：[1]西安微电子技术研究所,西安710119 [2]中国科学院新疆天文台,乌鲁木齐830011

出　　处：《微波学报》2020年第3期81-86,共6页Journal of Microwaves

摘　　要：主动面控制技术是当前大口径、高精度射电望远镜广泛使用的主动补偿技术,其包含的促动器在补偿面形精度的同时也辐射电磁波并影响射电天文观测。文中结合目前研究现状,对极低电磁辐射要求下的促动器进行辐射源分析,重点针对促动器控制板上信号建立数学模型,并选取晶振回路计算,合理设定印制板及器件的参数,通过Ansys软件进行频域有限元分析,得到控制板晶振回路的辐射结果和规律。用近场测试验证了文中方法的有效性。该研究为促动器控制板的电磁兼容优化设计提供了验证方法,为降低主动面控制系统的电磁辐射奠定了基础。The active surface control technology has been widely used in the radio telescope which has large aperture and high precision.Actuators in the active surface system compensates the surface precision and radiates electromagnetic wave,which can interfere the observation of radio telescope.Considering the current research status,this paper analyzes the radiation source of an actuator for extremely low electromagnetic radiation requirement.The signal from the actuator’s control board is used to build a math model,crystal oscillator circuit is selected to perform calculation,the parameters of PCB and components are set appropriately,and Ansys software is used to perform finite element analysis on frequency domain,in this way,the result and the rule of radiation are obtained.Finally,the near field test verifies the validity of this method.This method provides a validation way for the optimal design of electromagnetic compatibility(EMC)about the actuator′s control board,and settles the base to reduce the electromagnetic radiation of the active surface system.

关 键 词：射电望远镜 主动面控制系统 促动器 电磁辐射 仿真 

分 类 号：TH743[机械工程—光学工程]