速率偏频激光陀螺系统速度数值积分算法误差分析与优化(英文)

用时域泰勒级数展开的方法分析了速率偏频激光陀螺惯导系统常用速度数值积分算法的误差。分析显示速率偏频陀螺本身的高速旋转使惯性导航系统时刻处于大角运动条件下。若其旋转轴与比力方向不平行,则常用速度算法的误差不可忽略。提出了速率偏频激光陀螺惯导系统速度算法的优化改进方法。对常用速度算法和提出的算法进行了仿真比较。仿真显示,用泰勒级数展开分析速度数值积分算法误差是可行的;提出的算法能够将速率偏频激光陀螺惯导系统以及其他惯性导航系统在大机动运动环境下的导航精度提高一阶。

Error analysis and optimization of velocity numerical integration algorithms for triad rate-biased RLG system

The error of the traditional velocity numerical integration algorithm is analyzed by using the method of time-domain Taylor series expansion for the triad rate-biased RLG system.It is revealed that due to the high-speed rotation of the triad rate-biased RLG,the system is in maneuver environments all the time,and if the rotation angular rate vector is not parallel to the specific force vector,the rotation will lead to the numerical integration algorithm error,which cannot be ignored.An optimized velocity numerical integration algorithm is presented and compared with the traditional one through simulation,which indicates that the Taylor series expansion can be used to evaluate the errors of velocity numerical integration algorithms,and the proposed algorithm can improve the navigation accuracy by one order for the triad rate-biased RLG system and other INSs under maneuvers.