摘要
通过测量北京密云50m天线在不同俯仰角度下X波段馈源的焦点轴向偏移,拟合出了由于天线重力形变引起的X波段馈源的焦点轴向偏移曲线。为了补偿焦点偏移,设计了包含电流环、转速环和位置环的馈源控制系统,并基于Matlab/Simulink软件,对系统进行了仿真。仿真结果表明,本文设计的馈源控制系统能够补偿焦点偏移,且系统具有良好的动态和稳态性能。
This paper fits curves of axial displacement of focal point of an X-band feed at different elevations angles for the 50m antenna in the Miyun District of Beijing. The displacements are due to gravitational deformations of the antenna. In order to compensate the axial displacement, this paper designs a feed control system including a current loop, a speed loop, and a position loop. Simulations of the system are carried out based on the Matlab/Simulink software. The results show that the system can compensate the axial displacement of focal point and has satisfactory performance under dynamic or static condition.
出处
《天文研究与技术》
CSCD
2009年第4期271-275,共5页
Astronomical Research & Technology
关键词
重力形变
焦点轴向偏移
伺服系统
gravitational deformation
axial displacement of focal point
servo system
