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XNAV/CNS Integrated Navigation Based on Improved Kinematic and Static Filter

Published online by Cambridge University Press:  21 June 2013

Yidi Wang
Affiliation:
(College of Aerospace Science and technology, National University of Defence Technology, Changsha, China)
Wei Zheng*
Affiliation:
(College of Aerospace Science and technology, National University of Defence Technology, Changsha, China)
Xueyin An
Affiliation:
(College of Aerospace Science and technology, National University of Defence Technology, Changsha, China)
Shouming Sun
Affiliation:
(The State Key Laboratory of Astronautic Dynamics, Xi'an Satellite Control Centre, Xi'an, China)
Li Li
Affiliation:
(Science and Technology on Aerospace Flight Dynamics Laboratory, Beijing, China)

Abstract

In order to enhance the independent viability of high-orbit satellites, an X-ray pulsar-based navigation (XNAV)/celestial navigation system (CNS) integrated navigation method is proposed. An improved kinematic and static filter is derived to fulfil data fusion that can obtain an optimal estimation for global use. In the filter, unscented transformation is used to reduce linearization error, and the technique of separate-bias is used to reduce the impacts of systematic errors in XNAV measurements. The results of simulations have shown that the proposed navigation system can reach a positioning accuracy of less than 100 m, an improved performance over separate XNAV and CNS.

Type
Research Article
Copyright
Copyright © The Royal Institute of Navigation 2013 

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