大型射电望远镜反射面主动调整系统设计

Design of Active Reflector Adjustment System for Large Radio Telescope

详细介绍了一种大型射电望远镜在高频段调整各块天线面板的反射面主动调整系统的设计。采用总线的分布式控制,通过主控制计算机与促动器微控制器的联机的方式,实现用户对反射面主动调整系统促动器的控制,同时取得促动器的相关状态信息,减小了反射面由于重力变形、温度差异、风力引起的曲线误差,从而获得高精度的天线曲面,提高天线反射面的效率。促动器采用集成化的步进电机驱动,把微控制器、驱动器、编码器、数据寄存器等元器件内置于电机内,融电机和驱动技术于一体,节约了安装空间,简化了繁琐的布线。

The paper introduces the design of an active reflector adjustment system for large radio telescope operating in high frequency band. The system realizes the control of active reflector system actuator through the communication between master control computer and actuator micro control unit （MCU） using CAN fieldbus, and obtains the status information of actuator at the same time. It reduces the deformation caused by gravity, temperature and wind, so realizes a high-accuracy antenna reflector, and improves the efficiency of antenna reflector. The actuator is driven by an integrated step motor, which integrates micro controller, driver, encoder and register etc. Motor and drive technologies are incorporated together, so the space needed for installation is reduced, and complicated cabling is simplified.