作者：林青，韦在陆（桂林长海发展有限责任公司，广西 桂林 541001）

摘要：通过计算机将STK（Satellite Tool Kit）生成的目标卫星轨道数据导入伺服转台的控制电路中。伺服控制电路通过定位定向接收机获取授时指令完成系统对时，之后不断接收定位定向接收机产生的秒脉冲（PPS），结合处理器内部的定时器计数器进行精确计时。根据计时时间提取与之相对应的卫星轨道数据，使用PID控制算法计算出PWM控制量，经驱动电路后驱动步进电机实现方位、俯仰伺服控制，使得转台上搭载的天线始终对准目标卫星，从而实现卫星跟踪。

关键词：卫星跟踪；过顶跟踪；STK；步进电机

Abstract: The target satellite orbit data generated by the STK (Satellite Tool Kit) is introduced into the control circuit of the servo turntable by computer. The servo control circuit obtains timing instructions from the positioning directional receiver to complete the system timing, and then continuously receives the pulse per second (PPS) generated by the positioning directional receiver, which is combined with the internal timer counter of the processor for accurate timing. According to the timing time, the corresponding satellite orbit data is extracted, and the PWM control quantity is calculated by PID control algorithm. After the driving circuit, the stepper motor is driven to realize the azimuth and pitch servo control, so that the antenna on the turntable is always aimed at the target satellite, so as to realize the satellite tracking.

Key words: Satellite tracking; Zenith pass tracking; STK; Stepper motor

在线预览：基于步进电机的卫星跟踪小型伺服转台

摘自《自动化博览》2021年3月刊