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Consistency of the EKF-SLAM Algorithm

Bailey, Tim, Nieto, Juan, Guivant, Jose, Stevens, Michael, Nebot, Eduardo·2006·2006 IEEE/RSJ International Conference on Intelligent Robots and Systems

Abstract

This paper presents an analysis of the extended Kalman filter formulation of simultaneous localisation and mapping (EKF-SLAM). We show that the algorithm produces very optimistic estimates once the "true" uncertainty in vehicle heading exceeds a limit. This failure is subtle and cannot, in general, be detected without ground-truth, although a very inconsistent filter may exhibit observable symptoms, such as disproportionately large jumps in the vehicle pose update. Conventional solutions - adding stabilising noise, using an iterated EKF or unscented filter, etc., - do not improve the situation. However, if "small" heading uncertainty is maintained, EKF-SLAM exhibits consistent behaviour over an extended time-period. Although the uncertainty estimate slowly becomes optimistic, inconsistency can be mitigated indefinitely by applying tactics such as batch updates or stabilising noise. The manageable degradation of small heading variance SLAM indicates the efficacy of submap methods for large-scale maps

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Metadata

Authors
Bailey, T., Nieto, J., Guivant, J., Stevens, M., & Nebot, E.
Venue
2006 IEEE/RSJ International Conference on Intelligent Robots and Systems
Publisher
IEEE
Published
2006-10
Pages
3562-3568
OpenAlex
W2165468899
Cited by
566
References
14
FWCI
55.46
Type
conference paper
Language
en
Open access
closed

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CoChat. (2026). Citation check: Consistency of the EKF-SLAM Algorithm. https://app.cochat.ai/papers/10.1109/iros.2006.281644
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Bailey, T., Nieto, J., Guivant, J., Stevens, M., & Nebot, E. (2006). Consistency of the EKF-SLAM Algorithm. 2006 IEEE/RSJ International Conference on Intelligent Robots and Systems. https://doi.org/10.1109/iros.2006.281644

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