DETERMINATION METHOD FOR DYNAMIC PARAMETERS OF MARINE MOVEMENT MATHEMATICAL MODEL

摘要

FIELD: ship navigation.; SUBSTANCE: invention refers to ship navigation and can be used for forecasting the ship movements in the course of maneuvering. The fore and backward points are conditionally used. The fore and backwards points are located on the centerline plane of the ship. On a real time basis the coordinates of the fore and backward points are measured. Measurement of the coordinates is fulfilled with the help of the static shear stress receivers and with differential corrections. On the basis of the coordinate measurement results the current values of kinematic movement parameters are determined: linear speeds of the fore F (υ_f) and backward A (υ_a) points and their longitudinal (υ_fx, υ_ax) and lateral (υ_fy, υ_ay) components in the moving coordinates ZX0Y connected with the ship; longitudinal centre of the rotation (x₀) in the moving coordinates ZX0Y connected with the ship; projection of the linear speed vector in the centre of gravity on the y axis 0Y (υ_y); linear speed of the ship centre of gravity (υ); curvature of the gravity path (R); angular rate of the ship (ω). The obtained results are used for calculation of the current values of the dynamic parameters of the marine movement mathematical model. On the basis of the mathematical model computer modeling is performed in order to forecast the ship movements in the course of maneuvering.; EFFECT: improvement of the accuracy of forecasting of the ship movements in the course of maneuvering on the basis of an adequate mathematical model of its travel.;3 cl, 1 dwg