抗差自适应滤波在低轨飞行器INS/CNS/GNSS组合导航中的应用

摘要

低轨飞行器对导航系统的稳定性要求较高,采用标准卡尔曼滤波的组合导航系统在异常扰动情况下会产生较大误差,严重影响低轨飞行器导航精度.在此前提下提出将抗差自适应滤波用于低轨飞行器导航系统,并基于该滤波器设计INS/CNS/GNSS组合导航.通过仿真实验对比验证抗差自适应滤波的有效性.%The low earth orbit (LEO) spacecraft has high requirement for the stability of navigation system.If the standard Kalman filter is used to the integrated navigation system,large errors might occur and the navigation accuracy of the LEO spacecraft will decrease when abnormal disturbances occur.Hence,an adaptive robust filter is proposed to apply to the navigation system of LEO spacecraft,and then the INS/CNS/GNSS integrated navigation is designed based on it.To verify the effectiveness of the adaptive robust filter,simulation experiments are implemented respectively for the integrated navigations with the standard Kalman filter and adaptive robust filter.