基于粒子滤波的通信保障航天器相对导航方法

Relative navigation method of communication supporting space-craft base-on particle filter

摘要:

为提高通信保障航天器天线指向精度,提出一种基于粒子滤波的通信保障航天器相对导航方法,获得两个航天器间更精确相对位置和速度．该方法利用测量距离远、覆盖率高和可全天候工作的无线电设备为主要测量部件,利用粒子滤波在非线性系统滤波上的优势,进行相对位置和速度的估计．仿真结果表明,新算法能够有效降低测量误差,提高相对位置和速度估计精度,保证通信保障航天任务的有效进行．

Abstract:

On-orbit servicing spacecraft has become a hot research field at domestic and abroad in recent years, communication supporting spacecraft as a class of on-orbit servicing spacecraft can provide date forwarding service to the communication fault spacecraft, which can prolong the on-orbit life. In order to improve the communication supporting spacecraft antenna pointing accuracy, relative navigation algorithm of communication supporting spacecraft based-on particle filter is proposed, then more precise relative position and speed between two spacecrafts are obtained. This method takes radio equipment as the main measurement parts for its inherent characteristics, such as long measuring distance, high covering rate and all-weather work, and combines the advantage relative position and speed estimation of particle filter in nonlinear system filtering. Simulation results show that the new algorithm can effectively reduce the errors and improving relative position and speed estimation precision, ensure the space missions of communication support effectively.