| 主权项 |
1. A vessel, comprising:
a hull; a support structure connected to said hull, the support structure configured for supporting a mass, the support structure being constructed to allow the mass to make a back and forth movement relative to said hull along a trajectory, between opposite ends of said trajectory; a damping device configured to dampen the movement of the mass relative to said hull, wherein the damping device comprises:
a winch positioned at a support point on said hull, wherein one end of a line is spooled on the winch, wherein the line connects the support point on the hull with the mass, the winch and the line being constructed to apply a damping force on the mass, and wherein the winch is constructed to pay out the line during a movement of the mass away from the support point, and to take in the line during a movement of the mass toward the support point;an energy dissipation device which is coupled to the winch, the energy dissipation device being constructed to dissipate energy from the moving mass;at least one speed sensor which is configured to measure a payout speed of the line from the winch and to generate a speed signal on the basis of the measured speed;at least one tension sensor which is configured to measure a tension in the line and to generate a tension signal on the basis of the measured tension;a control unit which is coupled to the speed sensor and to the tension sensor, the control unit being configured to:determine a desired tension in the line on the basis of the speed signal and a stored relationship between the payout speed and the tension force; andcontrol the energy dissipation device in dependence of a difference between the desired tension and the actual tension measured by the tension sensor; wherein the damping device is constructed to provide a damping force on the mass which is maximized, such that if the speed of the mass exceeds a certain value, the damping force does not exceed a predetermined maximum value; and wherein the damping device is constructed to provide a damping force on the mass which is minimized for a maximum speed of the mass in a direction toward the support point, such that if the speed of the mass in a direction toward the support point on the hull exceeds a certain value, the damping force on the line does not fall below a predetermined minimum value, in order to ensure that the line remains taut. |
