摘要
针对陀螺长时间积分定姿精度受陀螺角速率漂移影响,单独利用磁强计不能连续确定三轴姿态的问题,提出了陀螺与磁强计组合定姿算法,利用磁强计估计的姿态误差校正陀螺积分姿态,并基于PI滤波估计陀螺漂移。仿真验证表明,基于陀螺与磁强计组合定姿的姿态确定精度为1°左右。陀螺与磁强计PI滤波组合定姿算法简单有效,适合在纳星、皮星等微小卫星上应用。
In view of attitude precision reduced by gyro long time integral because of gyro drift,magnetometer can not continuously determine the three axis attitude. The determination algorithm of gyro and magnetometer is implemented in this paper. The integrated attitude of the gyro is corrected by the estimated attitude error based on geomagnetic field vector,and the estimated gyro drift is based on PI filter. The simulation result shows that the attitude determination precision is about 1°. The PI filter combined with attitude determination algorithm is simple and effective. It is suitable for the application of micro-satellites.
作者
王献忠
张肖
刘艳
Wang Xianzhong;Zhang Xiao;Liu Yan(Shanghai Key Laboratory of Aerospace Intelligent Control Technology,Shanghai 201109,China;Shanghai Academy of Spaceflight Technology,Shanghai 201109,China;Shanghai Aerospace Control Technology Institute,Shanghai 201109,China)
出处
《航天控制》
CSCD
北大核心
2020年第4期9-13,共5页
Aerospace Control
关键词
陀螺
磁强计
组合定姿
漂移估计
卫星
Gyro
Magnetometer
Integrated attitude determination
Drift estimation
Satellite
作者简介
王献忠(1971-),男,博士,研究员,主要研究方向为飞行器GNC系统研究与设计;张肖(1981-),女,硕士,研究员,主要研究方向为飞行器姿态确定与控制研究与设计;刘―艳(1980-),女,硕士,高级工程师,主要研究方向为飞行器控制系统设计。
