Probabilistic sonar scan matching for an AUV

Authors:
Emili Hernández;Pere Ridao;David Ribas;Angelos Mallios
Affiliations:
Department of Computer Engineering, University of Girona, Girona, Spain;Department of Computer Engineering, University of Girona, Girona, Spain;Department of Computer Engineering, University of Girona, Girona, Spain;Department of Computer Engineering, University of Girona, Girona, Spain
Venue:
IROS'09 Proceedings of the 2009 IEEE/RSJ international conference on Intelligent robots and systems
Year:
2009

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Abstract

This paper proposes MSISpIC, a probabilistic sonar scan matching algorithm for the localization of an Autonomous Underwater Vehicle (AUV). The technique uses range scans gathered with a Mechanical Scanning Imaging Sonar (MSIS), the robot displacement estimated through dead-reckoning using a Doppler Velocity Log (DVL) and a Motion Reference Unit (MRU). The proposed method is an extension of the pIC algorithm. An Extended Kalman Filter (EKF) is used to estimate the robot-path during the scan in order to reference all the range and bearing measurements as well as their uncertainty to a scan fixed frame before registering. The major contribution consists of experimentally proving that probabilistic sonar scan matching techniques have the potential to improve the DVL-based navigation. The algorithm has been tested on an AUV guided along a 600m path within an abandoned marina underwater environment with satisfactory results.