捷联惯导系统大方位失准角下的非线性对准  

SINS Nonlinear Alignment with Large Azimuth Misalignment Angles

作　　者：魏春岭[1] 张洪钺[1] 郝曙光[1] 

机构地区：[1]北京航空航天大学自动化学院,北京100083

出　　处：《航天控制》2003年第4期25-35,共11页Aerospace Control

摘　　要：采用欧拉角描述平台坐标系与导航坐标系间的失准角,推导了适用于捷联惯导系统的非线性误差方程,证明了该方法仅适用于方位误差角为大角度,而水平误差角为小量的情况。数学仿真表明:在方位误差角为大角度情况下,采用所推导的误差方程和非线性滤波技术能获得更高的估计精度。Luler angles are adopted to describe the misalignment of platform to navi- gation frame. It was pointed out that the derived error medels are only valid when the head- ing uncertainty is large and the level misalignment angles are small. The simulation results show that, under large azimuth misalignment, good alignment accuracy can be obtained us- ing the derived nonlinear error models and nanlinear filtering techniques.

关 键 词：惯性导航 非线性滤波 捷联惯导系统 失准角 非线性误差方程 非线性滤波技术 方位误差角 数学仿真 

分 类 号：V241.622[航空宇航科学与技术—飞行器设计]