Journal of Systems Engineering and Electronics ›› 2010, Vol. 21 ›› Issue (4): 675-681.doi: 10.3969/j.issn.1004-4132.2010.04.022

• CONTROL THEORY AND APPLICATION • Previous Articles     Next Articles

Pulsar/CNS integrated navigation based on federated UKF

Jin Liu, Jie Ma*, and Jinwen Tian   

  1. State Key Laboratory for Multi-spectral Information Processing Technologies, Institue for Pattern Recognition and artifical Intelligence, Huazhong University of Science and Technology, Wuhan 430074, P. R. China

  • Online:2010-08-26 Published:2010-01-03

Abstract: In order to improve the autonomous navigation capability of satellite, a pulsar/CNS (celestial navigation system) integrated navigation method based on federated unscented Kalman filter (UKF) is proposed. The celestial navigation is a mature and stable navigation method. However, its position determination performance is not satisfied due to the low accuracy of horizon sensor. Single pulsar navigation is a new navigation method, which can provide highly accurate range measurements. The major drawback of single pulsar navigation is that the system is completely unobservable. As two methods are complementary to each other, the federated UKF is used here for fusing the navigation data from single pulsar navigation and CNS. Compared to the traditional celestial navigation method and single pulsar navigation, the integrated navigation method can provide better navigation performance. The simulation results demonstrate the feasibility and effectiveness of the navigation method.