SHIP MOTION AUTOMATIC CONTROL SYSTEM Russian patent published in 2004 - IPC

FIELD: ship motion control in the presence (appearance) of strong disturbances (currents, wind), in particular, control of special ships that are designed for motion in a strictly prescribed trajectory (relative to the bottom).

SUBSTANCE: the system has a course angle selector, course angle and ship side drift formation unit, angular velocity formation unit and a rudder angle transmitter, the output of the course angle selector and the first output of the course angle and ship side drift formation unit are connected via the increment formation unit to the first input of the steering gear, whose second and third inputs are connected respectively to the outputs of the angular velocity formation unit and the rudder angle transmitter. In addition, the system uses three units: a differentiator, logical unit with three relays and a set point unit. At strong disturbances, causing the ship deflection from the prescribed course angle, for elimination of the deflection additionally introduced in the steering gear control law is set point “Δ” from set point unit 10 in logical unit 8 and further to the input of steering gear 6, which results in an additional shift of the rudder. At an essential shift from the prescribed motion trajectory the “Δn pr.” set point is supplied from set point unit 10 to the input of the regulator master motor 9, which results in an increase of the ship motion speed. After the return to the prescribed motion trajectory the set points get disconnected.

EFFECT: enhanced accuracy of ship stabilization relative to the prescribed trajectory.

2 dwg