摘要
针对星敏感器/陀螺典型卫星姿态确定系统配置,考虑确定性方法的离散性及状态估计法对模型准确程度的依赖性,提出了一种半确定性姿态确定方法。以四元数为姿态描述参数,用基于Taylor展开近似的线性回归修正陀螺预报的姿态,并用修正的姿态信息反推出陀螺漂移量。仿真结果表明:该算法实现简单,无需实时递推滤波器增益阵,计算速度快,定姿性能较佳,可有效提高陀螺的姿态预报精度。
When the discreteness of determinate methods and the precision dependence of state-estimated methods were considered,a novel semi-determinate method was proposed in this paper.The method was based on star-sensor and gyros which was typical in satellite attitude determination.Quaternion was employed to describe satellite attitude.Linear regression based on Taylor expression was then applied to modify the attitude which was predicted by gyros.Gyros excursion which could improve the attitude predicted accurac...
出处
《上海航天》
北大核心
2008年第5期16-19,56,共5页
Aerospace Shanghai
基金
国家自然科学基金(60604020)
航天支撑技术基金(2006-HT-GFKD-02)
关键词
姿态确定
四元数
星敏感器
陀螺
半确定性
Attitude determination
Quaternion
Star-sensor
Gyros
Semi-determination
