车载经纬仪的静态指向误差补偿  

Pointing error correction for vehicular platform theodolite

作　　者：李增[1,2] 吴志勇[1] 佟刚[1,2] 陈涛[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院研究生院,北京100039

出　　处：《光学精密工程》2010年第4期921-927,共7页Optics and Precision Engineering

基　　金：中国科学院三期创新工程资助项目

摘　　要：为了降低载车平台变形对经纬仪静态测角精度的影响,补偿较大变形产生的测角误差,实现移动站弹道测量,分析了平台变形对光电经纬仪静态测角误差影响的基本原理,利用固定在方位轴轴心的倾角传感器测量出因平台变形而导致的经纬仪工作基准面中心点与水平面变化的夹角,并计算其测量坐标系的变化量。建立了平台中心变形角的底部轮廓图,经过有限的平台变形采样,存入计算机,在计算机中以方位、俯仰角为输入变量建立二维查找表,通过插值计算全方位角和全俯仰角的平台变形量,进行事后补偿。实验结果表明,该方法能够有效地补偿因平台变形而带来最大为142″的测角误差,使方位测角精度提高44″,俯仰测量精度提高8.5″。该方法为实现高精度车载光电测量提供了一种有效的途径。In order to reduce the influence of vehicular platform deformation on the theodolite measuring precision,compensate the angle error caused by large deformation,and to realize the trajectory measurement worked on mobile station,the principle of the effect of platform deformation on the measuring results was analyzed,and the center deformation angles caused by the platform deformation were measured by using dual-axis inclinometers put on the center of the azimuth axis,then the measuring coordinate deflection was calculated to figure out the deformation profile.The finite deformation testing results were storaged in a computer and a two-dimensional look-up table was created by taking azimuth and elevation angles as inputs.Finally,the any deformation angles on any azimuth and elevation angles were interpolated and calculated to complete the error compensation after the task.Results show that this method can compensate the error as large as 142″ caused by the platform deformation and can improve the azimuth precision by 44″ and elevation precision by 8.5″.It is shown that the method is a credible approach to pointing error correction of high precision vehicular platform theodolites.

关 键 词：车载平台 经纬仪 变形测量 指向误差 

分 类 号：V556[航空宇航科学与技术—人机与环境工程]