Sea State Estimation Using Vessel Response in Dynamic Positioning

Astrid H. Brodtkorb*, Ulrik Dam Nielsen, Asgeir J. Sørensen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

This paper presents a novel method for estimating the sea state parameters based on the heave, roll and pitch response of a vessel in dynamic positioning (DP), i.e., without forward speed. The algorithm finds the wave spectrum estimate from the response measurements by directly solving a set of linear equations, and as a result it is computationally efficient. Themain vessel parameters are required as input. Apart from this the method is signal-based, with no assumptions on the wave spectrum shape. Performance of the proposed algorithmis demonstrated on full-scale experimental DP data of a vessel in three different sea states at head, bow, beam, quartering and following sea waves, respectively.
Original languageEnglish
JournalApplied Ocean Research
Volume70
Pages (from-to)76–86
ISSN0141-1187
DOIs
Publication statusPublished - 2018

Keywords

  • Sea state estimation
  • Vessel response
  • Dynamic positioning
  • Closed-form expressions

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