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Improved Equivalent Rotation Vector Based Attitude Updating Algorithm of Strapdown Inertial Navigation System Under Highly Dynamic Environment
Author(s): 
Pages: 85-91
Year: Issue:  1
Journal: Chinese Journal of Space Science

Keyword:  高动态 捷联惯导系统 姿态更新 圆锥误差 等效旋转矢量;
Abstract: 高动态环境下捷联惯导系统的姿态算法是提高系统精度的关键技术.通过研究SINS高动态姿态更新方法,分析姿态矩阵解算的四元数及等效旋转矢量算法,使等效旋转矢量算法在高动态环境下的应用问题得以完善.为改善等效旋转矢量算法对于高动态飞行环境的适应性,以圆锥运动作为环境条件,对等效旋转矢量算法进行改进,推导改进算法的误差.通过与单子样和三子样等效旋转矢量算法进行仿真对比,验证了改进算法的有效性.
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