Analysis of the process of obsessing the turning of the vessel

When maneuvering a vessel, there are no methods for determining the beginning of the obsession of turning in manual and automatic modes. Based on experimental maneuvers, a method is proposed for finding the point of obsession of the rotation of the steady circulation of the vessel, based on the division of the elements of rotation into periods with their subsequent approximation by various functions. The quality of the approximation is evaluated, the effectiveness of the selected functions is proved. To perform the calculations, records of the motion data of the simulation model obtained using a navigation simulator were used. A series of experiments included time series of measurements with subsequent smoothing by the method based on the Gauss function, during the circulation of a vessel with different rudder masonry. The use of the proposed method is possible both for tabular circulation accounting and for the formation of a command signal of automatic ship control systems.