数字式太阳姿态敏感器抗干扰特性研究

Study on Characteristics to Eliminate the Disturbance of Digital Sun Sensor

分析了天体干扰光斑的位置和光强对卫星数字式太阳敏感器姿态角输出的影响。基于太阳光斑和天体干扰光斑具有不同的输出电压和位置特性,提出了一种分别计算每个光斑的输出电压值和入射角度的比值,并与标定的太阳垂直入射时输出电压值作比较而得到正确太阳姿态角的新抗干扰方法。

The effect that the position and light intensity of the interferential celestial bodies＇ spot on the output attitude angle of the Digital Sun Sensor （DSS） was analyzed. Based on that the output voltage and position characteristics of the sun＇s spot is different from that of the interferential celestial bodies＇ spot, a new method to eliminate the disturbance of DSS was proposed. Firstly this method calculates the ratio of the output voltage and the incidence angle of the spots separately. Then compares them with the output voltage when sun shines uprightly. In this way the correct sun attitude angle is got.