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An Extended Dynamic Model for Kinematic Positioning

Published online by Cambridge University Press:  27 January 2003

Michael Moore
Affiliation:
Satellite Navigation & Positioning Group, University of New South Wales
Jinling Wang
Affiliation:
Satellite Navigation & Positioning Group, University of New South Wales

Abstract

The main problems faced by a dynamic model within a Kalman filter occur when the system experiences unexpected dynamic conditions, a change in data acquisition rate, or when the dynamics of the system are non-linear. To minimize the errors produced from dynamic modelling in unusual conditions, an extended dynamic model is developed in this paper, and its usefulness demonstrated through comparison of the performance of a Kalman filter's response to simulated data with a standard dynamic model and the extended dynamic model. The results show that, in use, the proposed extended dynamic model is superior to a standard dynamic model, due mainly to its ability to adapt to a wider range of dynamic conditions, which in turn ensures the optimization of the Kalman filter and the consequent generation of reliable positioning results.

Type
Research Article
Copyright
© 2003 The Royal Institute of Navigation

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