大型射电望远镜主动反射面控制(英文)  

Active surface control for a large radio telescope

作　　者：李同英[1,2,3] 张振超[1,2] 李爱华[1,2] 王佑[1,2] 

机构地区：[1]中国科学院国家天文台南京天文光学技术研究所,南京210042 [2]中国科学院天文光学技术重点实验室,南京210042 [3]中国科学院大学,北京100049

出　　处：《中国科学技术大学学报》2013年第1期24-28,共5页JUSTC

基　　金：Supported by National Science Foundation of China(10833004)

摘　　要：针对13.7m毫米波望远镜的特点提出一种新型主动反射面的控制方法,消除重力、温度、湿度和风力等对主反射面的影响,从而提高大型射电望远镜的分辨率、灵敏度和观测效率,设计了一种CAN/ethernet协议转换器,实现CAN中大量位移促动器与其在工业以太网中的主机的通信,通过光电编码器的反馈闭环控制位移促动器的驱动电机,大大提高了反射面的控制精度.Due to gravity, temperature, humidity, wind loading, etc, there are errors between the actual surface and the ideal surface of a radio telescope antenna when it is at work. To compensate for these errors and improve the global performance of a large radio telescope such as Delingha 13.7 m millimeter-wave telescope, a novel active surface control method was proposed to increase its resolution, sensitivity and observation efficiency at high frequencies according to the changes of its antenna situation in the observation process. A controller area network/ ethernet protocol converter was designed for the communication between the active surface control computer as a host computer in ethernet and the displacement actuator controller in controller area network. The closed-loop control of the displacement actuator driven by a stepper motor and controlled by an intelligent controller improves the control accuracy greatly through the feedback link based on the optical encoder.

关 键 词：13.7m毫米波射电望远镜 主动反射面 位移促动器 CAN ethernet协议转换器 闭环控制 

分 类 号：TN929[电子电信—通信与信息系统]