INS Drift Mitigation during DVL Outages

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

An inertial navigation system is commonly fused with a Doppler velocity log to provide an accurate navigation solution for autonomous underwater vehicles. In some situations, like when passing or over trenches on the seafloor, not all of the Doppler velocity log beam measurement are reflected back. As a consequence, the navigation solution depend only on the inertial navigation solution, which drifts in time due to measurement errors in the inertial sensors. To cope with such situations, an algorithm to enable the estimation of the velocity vector in situations of complete outage was proposed, based on past Doppler velocity log measurements and a kinematic model. In this paper, this algorithm is elaborated by taking past filter based estimated velocity measurements. In this manner, the inertial data is incorporated into the past velocity measurements and thus richer information is obtained. However, in such situations the process and measurement noises are now correlated and hence, should be accounted for in the navigation filter. Simulation results are presented to show the benefits of using the proposed approach.

Original languageEnglish
Title of host publicationOCEANS 2021
Subtitle of host publicationSan Diego - Porto
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9780692935590
DOIs
StatePublished - 2021
EventOCEANS 2021: San Diego – Porto - San Diego, CA, USA, San Diego, United States
Duration: 20 Sep 202123 Sep 2021

Publication series

NameOceans Conference Record (IEEE)
Volume2021-September
ISSN (Print)0197-7385

Conference

ConferenceOCEANS 2021: San Diego – Porto
Country/TerritoryUnited States
CitySan Diego
Period20/09/2123/09/21

Bibliographical note

Publisher Copyright:
© 2021 MTS.

Keywords

  • Autonomous Underwater Vehicle
  • Doppler Velocity Log
  • Extended Kalman Filter
  • Inertial Navigation Systems
  • Underwater Navigation

ASJC Scopus subject areas

  • Oceanography

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