摘要
雷达天线长期处于架设状态容易产生变形,为了确保整个雷达系统处于良好运行状态,需定期对天线面进行检测。目前已有的曲面拟合方法往往无法得出曲面的标准方程参数或者得到的参数拟合精度不高。利用一般二次曲面和特征值条件对雷达天线椭圆抛物面方程进行拟合,并阐述了测量坐标与标准坐标之间的转换关系、特征向量与旋转角的关系,将天线椭圆抛物面方程的一般形式转化为标准方程格式。工程实例证明该方法是行之有效的。
Radar antennas on long -period erection state can easily lead to deformation. Therefore, periodical test is required. However, the standard equation parameters of the curved surface can not be computed out with existing surface fitting methods. A general quadric equation and eigenvalue condition are used to fit the elliptic parab- oloid equation, and the conversion relationship between the measurement coordinates and the standard coordinates expounded. Besides, the relationship between eigenvectors and rotation angles is shown. The general format of elliptic paraboloid equation is converted into standard format. An engineering example verifies that this method is applicable.
出处
《大地测量与地球动力学》
CSCD
北大核心
2008年第4期111-114,120,共5页
Journal of Geodesy and Geodynamics
关键词
曲面拟合
雷达天线
坐标转换
特征向量
特征值
surface fitting
radar antenna
coordinates transformation
eigenvector
eigenvalue
