Abstract: In the present article, based on a specific set of trials carried out in the CEHIPAR model basin, a parameter estimation of a torpedo-shaped underwater vehicle is performed. A complete modelling of the underwater vehicle is performed considering the dynamics of the vehicle and its actuators with data acquired in the model basin. Furthermore, it is proposed a modification of the conventional LOS method that works properly in presence of ocean currents. The modified LOS is applied to the torpedo-shaped model previously obtained and tested under realistic conditions.

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