基于资源三号卫星的GPS/星敏感器组合导航方法研究

GPS/star sensor integrated navigation method based on Ziyuan-3 satellite

目前对地观测体系中目标的位置测量以导航卫星为主,姿态测量则以高精度陀螺仪为主。前者与姿态量测尚未做到深度的信息融合,无法满足位置姿态预测的需求,后者受到陀螺仪累积误差的影响,无法实现长时间或长距离的目标追踪。为避免陀螺仪姿态量测的累积误差,文中提出一种基于资源三号卫星的GPS/星敏感器组合导航方法,针对GPS定位以及星敏感器定姿的误差问题,对两类过程中的误差进行综合处理,根据位置等信息计算GPS姿态,通过卡尔曼滤波进行组合导航。实验表明,该方案能有效减少定位定姿误差,提高GPS与星敏感器联合对地定位定姿的监测与服务能力。

At present,the position measurement of the target in the earth observation system is mainly based on navigation satellites,and the attitude measurement is mainly based on high-precision gyroscopes.However,navigation satellites have not yet achieved in-depth information fusion with attitude measurement and cannot meet the needs of position and attitude prediction,while gyroscopes are affected by the cumulative error and cannot achieve long-term or long-distance target tracking.In order to avoid the cumulative error of gyroscope in attitude measurement,this paper proposes a GPS/star sensor integrated navigation method based on Ziyuan-3 Satellite.Aiming at the errors of GPS positioning and star sensor attitude determination,the errors in the two types of processes are comprehensively processed.The attitude of GPS is calculated based on the position and other information,and the integrated navigation is performed through Kalman filtering.Experiments show that this method can effectively reduce position and attitude errors,and improve the monitoring and service capabilities of GPS and star sensor integrated navigation positioning and attitude determination.