基于坐标旋转的天线系统标校技术

Calibration Technology of Antenna System Based on Coordinate Rotation

现有的标校数学公式只适用于AE座架天线,为实现复杂座架形式天线的标校问题,提出了一种基于坐标旋转的天线系统标校方法。根据特定座架天线的轴系旋转顺序,采用坐标旋转方法推导出包含系统误差的天线指向标校计算公式。把该式作为数学模型,将多组已确定的地理指向角和基座姿态角以及与之对应的座架转角作为样本数据,采用最小二乘法标定出天线静态误差。该方法已经应用在船载卫通AEC座架天线标校,经系统标校修正后的天线指向精度得到了很大提高。

Since the existing calibration mathematical formula is only applicable to AE pedestal antenna,a new calibration method based on coordinate rotation is proposed in order to solve the calibration problem of complex pedestal antenna.According to the rotation order of the shafting of a given pedestal antenna,the formula for the calibration of antenna system error is derived by the coordinate rotation method.Using the formula as a mathematical model,the static errors of the antenna are calibrated by the least square method,by taking several groups of established geographical and base attitude angles and corresponding pedestal angles as sample data.This method has been applied to shipborne AEC pedestal antenna calibration,and the antenna pointing accuracy after system calibration is improved greatly.