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Publications
Costa, A.C., Xu, H.T. and Guedes Soares, C. (2021), “Robust Parameter Estimation of an Empirical Manoeuvring Model Using Free-Running Model Test”, Journal of Maritime Science and Engineering, Vol. 9(11), 1302.
The work presents the identification and validation of the hydrodynamic coefficients for the surge, sway and yaw motion. This is performed in two ways: using simulated data and free-running test data. The identification and validation with the simulation data are carried out using a 25º turning test and a 20º-20º zigzag manoeuvring test. For the free-running test data, two zigzag manoeuvres are used: 30º-30 zigzag for identification and 20º-20º zigzag for validation. A nonlinear manoeuvring model is proposed based on the standard Euler equations, and the hydrodynamic coefficients are computed using empirical equations. To obtain robust results, the truncated singular value decomposition is employed to diminish the multicollinearity and the parameter uncertainties due to noise. The validation is carried by comparing the result of the measured values with the predictions obtained using the manoeuvring models. Finally, a sensitivity analysis for the simulation data is performed to understand the influence of the parameters in the manoeuvres.
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