多星编队相对轨道的自主确定

编队飞行的相对轨道确定具有重要意义。针对编队应用中多颗环绕星相对中心星的自主定轨问题进行了研究，提出引入环绕星间相对测量信息的分布式滤波方案。设计了二级滤波器，利用环绕星间测量信息提高一级滤波得到的环绕星相对轨道的确定精度。仿真结果验证了这种导航方案的有效性。

Autonomous Determination of Relative Orbit for Multi-satellite Formation

Autonomous orbit determination for satellite formation flight is of great importance. The objective of this paper is to estimate the relative orbits for the multi-satellite formation, an approach of decentralized filter on the basis of augmenting the measurements between slave satellites is developed. The orbit states estimation was achieved through a two-level Kalman filter design, the first-level filter estimated the local states, and the precision of those estimations was enhanced in the second-level filter with the help of the measurements between slave satellites. The numerical simulation results verify the validity of this navigation approach.