一种高精度捷联惯组方位引出方法  

Azimuth extraction method for high-precision strapdown IMU

作　　者：仲岩[1] 王丹丹 王兴全[1] 王东升[1] 李彦征[1] 孙学成[1] 

机构地区：[1]天津航海仪器研究所,天津300131 [2]中国宇航系统工程研究所,北京100076

出　　处：《中国惯性技术学报》2014年第6期845-848,共4页Journal of Chinese Inertial Technology

基　　金：国防科技预研重点项目(A0320132002)

摘　　要：设计了捷联惯组方位基准镜安装误差的标定方法,实现了高精度的方位引出。首先,把捷联惯组固定在标准六面体内,在高精度转台上进行捷联惯组的参数标定,使捷联惯组导航坐标系与标准六面体一致;然后,在有L形靠面的水平大理石平板上,借助实验室内高精度的北向方位基准,使用经纬仪对平面镜与标准六面体之间的安装误差进行标定。通过坐标系间姿态矩阵转换,修正安装误差后,平面镜成为方位基准镜,从而实现捷联惯组的方位角引出,其均方误差不大于3″。A calibration method for the installation error of IMU azimuth reference mirror was designed, and the IMU's high-precision azimuth output was realized. First, the parameters of IMU fixed in a standard hexahedron was calibrated, and the navigation coordination of IMU was aligned to the standard hexahedron. Then, the installation error of azimuth reference mirror to the standard hexahedron was calibrated on a level marble plate with a L-form edge using a theodolite and based on a north reference installed in the laboratory. By transforming the attitude matrixes of the coordinates to correct the installation errors, it is verified that the mirror becomes the azimuth reference of the IMU, and high-precision extraction of IMU azimuth is realized. ©, 2014, Editorial Department of Journal of Chinese Inertial Technology. All right reserved.

关 键 词：捷联惯组 方位引出 高精度转台 标准六面体 标定 

分 类 号：O3[理学—力学]