Abstract:
A vessel having at least one hull, a body and a suspension system for supporting at least a portion of the body above the at least one hull is described. The suspension system includes at least one support means, and the vessel further includes at least one gyroscopic stabilizer for attenuating rotation of the body about at least one stabilizing axis.
Abstract:
A boat having a deck and a hull includes a suspension for suspending the deck with respect to the hull. Sensors are employed to determine motion of the deck, with a controller adjusting the suspension such that it maintains the pose of the deck with respect to an inertial reference and with respect to pitch, roll, and heave of the deck.
Abstract:
A method for controlling the motion of marine vessel (10) comprises mounting a gyroscope (12) in a gimbal and fixing the gimbal inside the vessel. In one arrangement, a trunnion axis (18) of the gimbal is mounted athwart the vessel (10). Sensors (20) are mounted at various locations on the vessel (10), as well as on the gyroscope (12), to measure the moton of the vessel (10), including motion caused by wave action. Signals from the sensors (20) are processed by a computer that in turn controls a motor to apply a force about the trunnion axis (18) to the gyroscope (12) in a direction that causes the gyroscope (12) to provide a reactive torque urging the vessel (10) to follow the slope of the wave and reduce the motion in the vessel (10). Thus, the method causes the gyroscope to apply reactive force that causes the vessel (10) to follow the slope of the waves acting on the vessel. This in essence eliminates hydrodynamic and hydrostatic force on the vessel and therefore prevents resonance of the vessel (10) with the waves.
Abstract:
A oscillation suppression device is provided for attenuating a oscillation of an object (10) to be controlled by a gyro torque of a control moment gyro having a flywheel rotating at a high speed. The oscillation suppression device includes an angular velocity detector (18) for detecting a oscillation angular velocity of the object (10) to be controlled; and control units (17; 25, 26; 30; 40; 50) connected to a gimbal shaft (14a) of the control moment gyro for controlling the angular velocity (ϑ) of the gimbal (14) of the control moment gyro so as to absorb an external torque generated in the object to be controlled, in response to the oscillation angular velocity (Φ) detected by the angular velocity detector (18).