Journal article

PARAMETRIC IDENTIFICATION OF NONLINEAR SHIP ROLL MOTION FROM FORCED ROLL DATA

PJ GAWTHROP, A KOUNTZERIS, JB ROBERTS

JOURNAL OF SHIP RESEARCH | SOC NAVAL ARCH MARINE ENG | Published : 1988

Abstract

A method of estimating the parameters in a nonlinear, single-degree-of-freedom model of ship roll motion is described. It is shown that the 'linear-in-the-parameters' nature of the model allows formulation of a relatively simple, and computationally very efficient, estimation procedure, based on a recursive, linear least-squares algorithm. The method is applied to the case of forced roll, where the roll moment excitation can be accurately determined. The general nature of the estimation scheme allows the combining of data from a sequence of experiments with sinusoidal forcing of varying frequency, and also allows the use of data arising from a nonsinusoidal forcing moment. The technique is i..

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University of Melbourne Researchers