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Sea state estimation using vessel response in dynamic positioning
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DOI：10.1016/j.apor.2017.09.005.png)
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摘要
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This paper presents a novel method for estimating the sea state parameters based on the heave, roll and pitch response of a vessel conducting station keeping automatically by a dynamic positioning (DP) system, i.e., without forward speed. The proposed algorithm finds the wave spectrum estimate from the response measurements by iteratively solving a set of linear equations, and it is computationally efficient. The main 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 algorithm is demonstrated on full-scale experimental DP data of a vessel in three different sea states at head, bow quartering, beam, stern quartering and following sea waves, respectively. (C) 2017 Elsevier Ltd. All rights reserved.
Keyword:
Sea state estimation
Vessel response
Dynamic positioning
Closed-form expressions
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