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Publicações
Pascoal, R., Perera, L.P. e Guedes Soares, C. (2017), “Estimation of Directional Sea Spectra from Ship Motions in Sea Trials”, Ocean Engineering, Vol. 132, pp. 126-137
This paper compares the skill of two algorithms that enable real-time estimation of the directional sea spectra around a ship from its measured motions. One algorithm consists of nonlinear optimization of a parametric or non-parametric spectral model and the other is a Kalman filter based observer. Sea trials have been conducted on an oceanographic vessel that was instrumented with a six degree of freedom fibre optic gyro, complemented with a rate gyro, several accelerometers, a dedicated GPS receiver and a bow mounted down-looking wave radar with motion compensation. The two algorithms are applied to the measured data and a discussion is provided on their skill to reproduce the existing sea states.
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