编队飞行卫星高精度自主相对定轨研究

设计了一种应用于卫星编队的自主相对轨道确定方案,不同于目前广泛采用的C-W方程,采用了包含摄动影响的相对运动方程的解析表达式描述编队飞行。利用星间距离信息和方位信息作为观测量,设计扩展卡尔曼滤波器实现环绕卫星相对轨道的自主确定,仿真结果表明定轨精度比采用C-W方程提高一个数量级,验证了这种导航方案的有效性。

High Precision Autonomous Relative Orbit Determination for Satellite Formation Flying

An efficient approach for autonomous relative navigation of satellite formation flying is developed.Instead of using the commonly-used C-W equation,the formation flying is described in terms of analytic form of relative motion equation including earth perturbation.Inter-satellite distance measurement as well as orientation measurement are chosen as observation information,and the relative orbit states estimation is achieved through an extended Kalman filter design.A numerical simulation illustrates that the precision is higher one order of magnitude than using C-W equation,and this navigation method is validated.