科学研究

提出并实现了月面目标行进轨迹利用Kalman滤波和SBI技术进行实时相对测定的方法

借鉴GPS RTK误差改正的思想,利用同波束VLBI测量方法,即SBI,它是差分 VLBI 的一种衍生测量方法,它通过在同一波束内对月球车和着陆器进行同时观测,获得差分观测量,由于两探测器的距离很近,使得两探测器的信号传播路径相似,可极大的消除对流层、电离层延迟误差、仪器误差、钟差等影响,因此观测量的精度达到ps级的水平。率先在我国研制了《基于ΔVLBI(SBI)技术和Kalman滤波的月面目标行进轨迹实时相对测定软件》有自主知识产权的软件系统;该软件根据SBI测量原理以及融合了月面探测器的运动学以及SBI观测量的卡尔曼滤波器,实现了月面探测器SBI观测量的模拟以及探测器状态的解算。成果已投向国际深空探测的顶级刊物,得到了审稿专家的好评:“In this manuscript a positioning strategy of the lunar rover is developed base on the theory of Kalman Filter. Data simulation tests of the strategy are performed and the results were verified by least squares adjustment, which shows that the solution from the Kalman Filter is higher in precision than that from the least squares adjustment, and so demonstrates the positioning strategy is successful.”