用于高精度太阳敏感器标定的模拟光源控制系统设计

为了精确模拟空间太阳辐照方向的变化,设计了一种以计算机控制为核心的、用于高精度太阳敏感器标定的模拟光源闭环控制系统。由计算机直接控制光电隔离输出卡,所输出的数字信号经过功率驱动电路和软启动电路后实现模拟光源的开启与关闭,采用软件方式控制步进电机的转速和转向,并通过高精度光电编码器实时获取当前的转动角度值,再经串口通信反馈给计算机,构成闭环控制系统。标定测量表明：系统的俯仰角和方位角转动误差均小于0.02°,均满足高精度太阳敏感器标定对模拟光源的要求。

The design of solar simulator control system for high precision solar sensor

In order to simulate the direction change of the solar light in space, a computer control system of the solar simulator for high precision solar sensors is developed. The photoelectric isolation card of the computer control system outputs digital signals directly to turn on or off the solar simulator light source by the power drive and the soft start circuit, to control the step motor＇s direction and speed by software, to obtain the current angle values by a high precision photoelectric encoder, then to feed back to computer to complete a closed-loop system. The experiment results show the rotational errors for the elevation angle and the azimuth angle are both less than 0.02~, which can satisfy the high precision requirements of solar sensors.