敏感轴安装偏角的误差分析与标定方法  

Error analysis and calibration method of the installation angle of sensitive axis

作　　者：郭强[1] 李岁劳[1] 何颖[1] 

机构地区：[1]西北工业大学自动化学院,西安710129

出　　处：《仪器仪表学报》2017年第4期927-934,共8页Chinese Journal of Scientific Instrument

基　　金：航空基金(20150153002)项目资助

摘　　要：针对光电辅助惯导的高精度定位定向系统而言,系统间敏感轴安装偏角的标定是惯导系统初始对准的关键。建立了敏感轴安装偏角的标定原理,将安装偏角的标定转化为对横向位置误差的标定,详细分析影响横向位置误差的主要因素,将惯导系统误差的影响与安装偏角影响分离,采用递推最小二乘算法标定出安装偏角所引起的横向位置偏差。仿真结果表明:敏感轴安装偏角的标定精度优于10″,实验验证结果优于20″(1σ),并且算法简单、实验操作方便、耗时较少、对外在环境依赖性小,因此本系统满足高精度定位定向系统的对准要求。In the high-precision positioning and orientation system aided by the auxiliary Electro-Optical inertial navigation, the initial alignment installation angle of sensitive axis among systems is the key factor. Based on calibration principle of the installation angle of the sensitive axis, the installation angle calibration is converted to the calibration of the lateral position error. The main factors of affecting the lateral position deviation are detailedly analyzed, and the affection of INS system error and the installation angle are separated. The Lateral position deviation by the installation angle of sensitive axis is calibrated by using the least square algorithm. The simulation results reveal that the calibration accuracy of the installation angle of sensitive axis is less than 10＂. Experimental verification result is less than 20＂ （lo＇）. Moreover, the algorithm is simple and convenient to be implemented, less time-consuming, and small dependency on the external environment. Thus, the high-precision dynamic alignment requirement can be satisfied in this work.

关 键 词：捷联惯导系统 敏感轴安装偏角 横向位置偏差 递推最小二乘 

分 类 号：V666.12[航空宇航科学技术]