Research on navigation of satellite constellation based on an asynchronous observation model using X-ray pulsar |
| |
Authors: | Pengbin Guo Jian Sun Shuling Hu Ju Xue |
| |
Institution: | State Key Laboratory for Strength and Vibration of Mechanical Structure, School of Aerospace, Xi’an Jiaotong University, PR China |
| |
Abstract: | Pulsar navigation is a promising navigation method for high-altitude orbit space tasks or deep space exploration. At present, an important reason for restricting the development of pulsar navigation is that navigation accuracy is not high due to the slow update of the measurements. In order to improve the accuracy of pulsar navigation, an asynchronous observation model which can improve the update rate of the measurements is proposed on the basis of satellite constellation which has a broad space for development because of its visibility and reliability. The simulation results show that the asynchronous observation model improves the positioning accuracy by 31.48% and velocity accuracy by 24.75% than that of the synchronous observation model. With the new Doppler effects compensation method in the asynchronous observation model proposed in this paper, the positioning accuracy is improved by 32.27%, and the velocity accuracy is improved by 34.07% than that of the traditional method. The simulation results show that without considering the clock error will result in a filtering divergence. |
| |
Keywords: | Pulsar navigation Modified Kalman filtering Asynchronous observation model Doppler effects |
本文献已被 ScienceDirect 等数据库收录! |