摘要
针对惯导系统横向坐标法,推导了惯导横向坐标系下的系统误差方程,通过求解静基座下的系统误差方程,研究了系统初始误差和惯性测量元件误差对基于横向坐标法的惯导系统的影响,在此基础上完成了系统误差仿真,并与地理经纬坐标解算方法进行比较。理论分析及仿真结果表明:横向速度误差、水平姿态误差为周期震荡型误差,位置误差和航向误差为随时间增长的积累型误差;横向坐标系法可以有效解决惯导地理经纬坐标解算方法的计算奇异和系统误差过大的问题。
The system error equations in the SINS transverse coordinate method are deduced for the transverse coordinate system.According to the solutions from the static base system error equations,the impact of system initial errors and inertial measuring unit errors on the transverse coordinate method is analyzed.System errors are simulated,and compared with system errors from the geographic coordinate computation method.Theoretical analysis and simulation results show transverse velocity errors and horizontal attitude errors are a type of periodic oscillation;position errors,azimuth error angle,wander azimuth error and heading errors increase with time.The transverse coordinate method can solve the problems arising when system errors increase and calculations output singular values in the geographic latitude and longitude coordinate calculating method.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2015年第11期1520-1525,共6页
Geomatics and Information Science of Wuhan University
基金
国家自然科学基金资助项目(41406212
41201478)
航空科学基金资助项目(20120816001)~~
