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对数字式太阳敏感器标定,现有的多项式拟合和只有内部参数的简单建模方法标定精度低,为提高标定精度,提出一种基于内外参数精确建模的标定方法.通过分析太阳敏感器标定系统的内外参数,建立太阳敏感器标定模型,基于太阳模拟器和两轴转台获取标定点数据,采用最小二乘法分两步优化得到各模型参数.该方法不需要太阳光线与太阳敏感器成像面的初始对准,操作方便,同时通过精确分离太阳敏感器内外参数,避免了标定系统外部参数误差对太阳敏感器内部参数标定的影响,且通过两步优化,进一步提高了太阳敏感器的标定精度.实验结果表明:该方法的标定精度达0.005°(±60°视场),比常用的标定方法的标定精度(0.02°)提高约4倍.
In order to improve the calibration accuracy, a calibration method based on accurate modeling of internal and external parameters is proposed for the calibration of digital solar sensors, the existing polynomial fitting and the simple modeling method with only internal parameters.By analyzing the solar sensor The calibration model of the solar sensor is established by calibrating the internal and external parameters of the system, and the calibration data are obtained based on the solar simulator and the two-axis turntable, and the model parameters are optimized in two steps by the least square method.This method does not need imaging of sun light and sun sensor The initial alignment of the surface is easy to operate. By accurately separating the internal and external parameters of the solar sensor, the influence of the external parameter error of the calibration system on the calibration of the internal parameters of the solar sensor is avoided, and the calibration of the solar sensor is further improved through the two-step optimization Accuracy.The experimental results show that the calibration accuracy of this method is about 0.005 ° (± 60 ° field of view), which is about 4 times higher than that of the common calibration method (0.02 °).