| 基于俯仰轴相交和球拟合的天线旋转中心测量方法 |
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| 引用本文： | 李宗春,路志勇,郭迎钢,张冠宇,何华,冯其强,陈少卿,王俊威.基于俯仰轴相交和球拟合的天线旋转中心测量方法[J].武汉大学学报(信息科学版),2019,44(10):1449-1456. |
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| 作者姓名： | 李宗春 路志勇 郭迎钢 张冠宇 何华 冯其强 陈少卿 王俊威 |
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| 作者单位： | 1.信息工程大学地理空间信息学院, 河南 郑州, 450001 |
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| 基金项目： | 中国电子科技集团公司航天信息应用技术重点实验室开放基金 |
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| 摘 要： | 针对传统天线旋转中心测量时，俯仰轴生成方式不严密对其精度和可靠性产生不利影响的问题，提出了俯仰轴相交和球拟合两种新的旋转中心测量方法。对不同方位下标志点绕俯仰轴的运动轨迹进行圆拟合，得到含有方位信息的俯仰轴，多条俯仰轴求交点作为旋转中心，称之为俯仰轴相交法，较传统方法可靠性更高。对标志点的运动轨迹进行球拟合，取所有球心的均值作为旋转中心，称之为球拟合法，避免了圆拟合及求交点的过程，方法更为严密。以3台φ3 m上行阵天线为实验对象，应用全站仪和工业摄影测量技术获取标志点在规划姿态下的坐标，采用两种新方法处理观测数据，均得到了内符合精度达亚毫米级的旋转中心。
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| 关 键 词： | 上行天线组阵 本地连接测量 天线旋转中心 工业摄影测量 俯仰轴相交 球拟合 |
| 收稿时间： | 2018-08-12 |
Two Measuring Methods for Antenna Rotating Center Based on Elevation Axes Intersection and Spherical Fitting |
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| Affiliation: | 1.Institute of Geospatial Information, Information Engineering University, Zhengzhou 450001, China2.CETC Key Laboratory of Aerospace Information Applications, Shijiazhuang 050081, China |
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| Abstract: | In traditional method, the model of elevation axis fitting is not rigor, which influences the accuracy and reliability of rotation center. To overcome this drawback, two new methods are proposed to get rotation center respectively based on elevation axes intersecting and spherical fitting. The trajectory of target points in different azimuths are fitted to acquire elevation axes which contain azimuth information, and the intersection of elevation axes is taken as rotation center, which is called as the elevation axes intersection method. This method is more reliable than the traditional method. The target points are fitted as a sphere to obtain a series of spherical centers, and their average is taken as the rotation center, which is named as the spherical fitting method. This method avoids the process of circle fitting and axes intersecting, which is more reasonable than the others. An uplink antenna array consists of three φ3 m antennas is taken as experimental object. Total station and industrial photogrammetric system are combined to get the coordinates of points on antenna. By employing the two new proposed methods, the antenna rotation centers are precisely acquired in a sub-millimeter level. |
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