【作者】 袁健； 张文霞； 隋树林； 于镭；

【Author】 YUAN Jian, ZHANG Wen-xia, SUI Shu-lin; YU lei (College of Automation and Electronic Engineering, Qingdao University Of Science and Technology, ingdao, 266042. China)

【机构】 青岛科技大学自动化与电子工程学院；

【摘要】 通过对扩展卡尔曼滤波泰勒展开线性化的研究,指出其存在的高阶舍入误差问题并提出通过对探测器和目标天体附近多颗小行星视线夹角以及与目标天体边缘张角的测量,同时结合天文几何关系,并通过建立系统的现状和观测方程,结合高阶扩展卡尔曼滤波来实时确定飞行器轨道状态的一种自主光学导航的方案;通过仿真验证了该方案的可行性;与一阶EKF 相比,在滤波精度上有很大的提高。更多还原

【Abstract】 Researching on linearization methods of Taylor equation for autonomous orbit determination of deep-space explorer, it is found that this linearization method exits rounding error; so an autonomous optical navigation scheme based on Higher Rank EKF is proposed to determine the orbit state in time, in which star sensor and navigation camera are used in measuring special angles between planetoids and explorer to set up state and measurement equation of system. As a result, this method proposed is feasible. Compared to general EKF algorithm, the filtering precision of improved algorithm is better than that of general EKF from the simulation.更多还原