基于星敏感器/陀螺组合的一种半确定性卫星定姿方法

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.

Semi-Determinate Method for Satellite Attitude Determination Based on Star-Sensor/Gyro

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...