一种改进的捷联惯导系统姿态算法  

An Improved Attitude Algorithm for Strap-down Inertial Navigation System

作　　者：张朝飞 杨孟兴 吴明强[2] 

机构地区：[1]中国航天科技集团第16研究所,西安710100 [2]第二炮兵装备研究院,北京100085

出　　处：《弹箭与制导学报》2012年第3期6-10,共5页Journal of Projectiles,Rockets,Missiles and Guidance

基　　金：总装备部重点预研项目资助

摘　　要：在应用旋转矢量的捷联惯导系统姿态解算中,陀螺采样频率一定的情况下,要提高圆锥误差的补偿精度,除了利用当前姿态更新周期内的陀螺输出,还应利用前面周期的陀螺输出。通过分析,提出了一种利用前M个周期输出的N子样圆锥误差补偿算法的通用形式。这种补偿算法的系数可由矩阵的简单计算获得,无需繁琐推导。最后,通过理论推导和仿真验证,该算法在不增加子样数的基础上能有效提高圆锥误差的补偿精度。In the attitude calculation of a strap-down inertial navigation system with rotation vector, in order to improve the accuracy of co- ning error compensation with certain gyro＇ s sampling frequency, the gyro＇ s output from current and previous updating period should be used. A general algorithm applied by N-sample used M-recurrent updating period was provided. The coefficients of this algorithm can be acquired by a simple matrix computation without deduction. Finally, this algorithm can improve the error compensation accuracy without increasing the number of sample by theory analysis and simulative results.

关 键 词：旋转矢量 捷联惯导系统 采样频率 圆锥误差 

分 类 号：V249.322[航空宇航科学与技术—飞行器设计]