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Effect of Sampling Rate in Sea Trial Tests on the Estimation of Hydrodynamic Parameters for a Nonlinear Ship Manoeuvring Model

Xu, Haitong ; Pires da Silva, P. ; Guedes Soares, C.

Journal of marine science and engineering, 2024-03, Vol.12 (3), p.407 [Periódico revisado por pares]

Basel: MDPI AG

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Título:
Effect of Sampling Rate in Sea Trial Tests on the Estimation of Hydrodynamic Parameters for a Nonlinear Ship Manoeuvring Model
Autor: Xu, Haitong ; Pires da Silva, P. ; Guedes Soares, C.
Assuntos: Coefficients ; Defence craft ; Global positioning systems ; GPS ; Hydrodynamic coefficients ; Hydrodynamics ; Identification ; Kinematics ; Least squares ; Maneuvers ; manoeuvring model ; Mathematical models ; Offshore ; Parameter estimation ; Parameter robustness ; Parameter uncertainty ; Parameters ; Robustness ; Sampling ; sampling rate ; sea trial ; Sea trials ; Ships ; Simulation ; Support vector machines ; truncated LS-SVM
É parte de: Journal of marine science and engineering, 2024-03, Vol.12 (3), p.407
Descrição: This paper explores the impact of sampling rates during sea trials on the estimation of hydrodynamic parameters in a nonlinear manoeuvring model. Sea trials were carried out using an offshore patrol vessel and test data were collected. A nonlinear manoeuvring model is introduced to characterise the ship’s manoeuvring motion, and the truncated least squares support vector machine is employed to estimate nondimensional hydrodynamic coefficients and their corresponding uncertainties using the 25°–25° zigzag test. To assess the influence of the sampling rates, the training set is resampled offline with 14 sampling rates, ranging from 0.2 Hz to 5 Hz, encompassing a rate 10 times the highest frequency component of the signal of interest. The results show that the higher sampling rate can significantly diminish the parameter uncertainty. To obtain a robust estimation of linear and nonlinear hydrodynamic coefficients, the sampling rate should be higher than 10 times the highest frequency component of the signal of interest, and 3–5 Hz is recommended for the case in this paper. The validation is also carried out, which indicates that the proposed truncated least square support vector machine can provide a robust parameter estimation.
Editor: Basel: MDPI AG
Idioma: Inglês

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Effect of Sampling Rate in Sea Trial Tests on the Estimation of Hydrodynamic Parameters for a Nonlinear Ship Manoeuvring Model

Xu, Haitong ; Pires da Silva, P. ; Guedes Soares, C.

Basel: MDPI AG

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