太阳敏感器与磁强计组合定姿及陀螺漂移估计算法
Algorithm of Attitude Determination and Drift Estimation of Gyro Based on Sun Sensor and Magnetometer
王献忠 1张肖2
作者信息
- 1. 上海市空间智能控制技术重点实验室,上海 201109;上海航天技术研究院,上海 201109
- 2. 上海市空间智能控制技术重点实验室,上海 201109;上海航天控制技术研究所,上海 201109
- 折叠
摘要
针对磁强计或太阳敏感器仅能估计两轴姿态的问题,提出将太阳敏感器和磁强计测量信息作为观测量,通过与基于卫星轨道和姿态角速率推算的太阳指向和磁场强度比较,估计陀螺积分姿态推算误差,校正陀螺积分姿态,并基于PI滤波估计陀螺漂移.仿真试验结果表明姿态确定精度为1°左右.
Abstract
Aiming at the problem that magnetometer or sun sensors can only estimate the attitude of two axes,the observed quantity is presented by using the method of taking advantage of the observation vector measured by sun sensors and magnetometer,the attitude error is gained by using sun vector which is com-pared with the geomagnetic field vector estimated based on the orbit and the attitude angular velocity of the satellite.The integrated attitude of the gyro is corrected by the attitude error estimated based on the sun vec-tor and the geomagnetic field vector,and the gyro drift is estimated based on PI filter.The simulation result shows that the attitude determination precision reaches about 1°.
关键词
陀螺/太阳敏感器/磁强计/组合定姿/漂移估计/卫星Key words
Gyro/Sun sensor/Magnetometer/Integrated attitude determination/Drift estimation/Satellite引用本文复制引用
出版年
2024
NETL
NSTL
万方数据