摘要:
A suspension system for a marine vessel, the marine vessel including a body portion at least partially supported relative to at least a left hull and a right hull by the suspension system, the left and right hulls being moveable relative to each other and the body, the suspension system including resilient supports between the body portion and the left and right hulls. The suspension system providing at least a roll stiffness being arranged to provide a roll moment distribution (RMD) of the suspension system wherein roll forces effectively act at a position disposed within a longitudinal distance along the marine vessel from a steady state position of the resultant pressure forces acting on the left and right hulls when the marine vessel is operating in a planing or semi-planing mode. The longitudinal distance can be 20% or less of a waterline length of one of the at least a left and a right hull at design load in displacement mode.
摘要:
A vessel is disclosed having a body portion that is at least partially suspended above at least one left moveable hull and at least one right moveable hull, each hull being moveable with respect to the body portion. At least one sensor is arranged to sense at least one operational parameter of the vessel. The roll attitude of the body portion is adjustable and controlled during operation in response to the at least one operational parameter to ensure that the sum of the gravitational force and the centrifugal force acting on the vessel during a turn has a line of action that is substantially perpendicular to a deck of the vessel, i.e. that the vessel executes a coordinated turn.
摘要:
A vessel stabiliser control system (12) includes a sensor fault detection means (16) which senses the availability of sensing signals from a gyrostabiliser precession motion sensor (10) and a vessel roll motion sensor (14). The control system (12) controls the action of a gyro-actuator (8) which is mechanically coupled to a gyrostabiliser (4). The benefit of employing fault sensing of the sensors providing the process control variables is that the sensed number of available process control variables (or sensors) can be used to activate a tiered system of control modes. Each tiered control mode is designed to utilise the available process control variables to ensure safe and effective operation of the gyrostabiliser (4) that is tolerant of sensor faults and loss of power supply. A control mode selector (18) is provided for selecting the appropriate control mode based on the number of available process control variables.
摘要:
Pairs of counter-rotating regenerative flywheels (20, 30 and 60, 70) create reinforcing torques when electrical energy is transferred between the members of a pair. The transfer, of electricity can be controlled to counter undesired oscillations of a watercraft (10). Motion of the watercraft (10) is sensed by a sensor system(l 10), resolved into components and then the flywheels are controlled to apply torque that counteracts the undesired oscillation. Preferably, the motion of the watercraft is evaluated by the sensor in brief increments of one-tenth of a second or less.
摘要:
A gyroscopic roll stabilizer for a boat. The stabilizer includes a flywheel, a flywheel drive motor configured to spin the flywheel about a spin axis, an enclosure surrounding a portion or all of the flywheel and maintaining a below-ambient pressure or containing a below-ambient density gas, a gimbal structure configured to permit flywheel precession about a gimbal axis, and a device for applying a torque to the flywheel about the gimbal axis. The flywheel, enclosure, and gimbal structure are configured so that when installed in the boat the stabilizer damps roll motion of the boat. Preferably, the flywheel drive motor spins the flywheel at high tip speeds.
摘要:
The invention concerns a remote-controlled mobile platform having a volume mass close to that of the environment wherein it operates and comprising at least two pairs of thrusters (R1, R2 - R3, R4) whereof the propelling axes are adjustable in two mutually parallel planes and parallel to the longitudinal axis (X1, X2) of the platform, means being provided for steering the platform by adjusting the orientation of said thrusters (R1, R2 - R3, R4)
摘要:
An apparatus for use on a vessel and for gaining access to a fixed structure such as a marine platform. As shown a supply vessel (1) has located on the deck (2) a mounting (3) which is connected by a gimbal arrangement (30) to a support arm (4) carrying a boom assembly (5) with a capsule (6) for personnel. The arm (4), boom (5) and capsule (6) are controlled in position by hydraulic means (9, 31, 33, 36, 40, 41, 52) to be manoeuvred into a required position to transfer personnel to the platform or decking (7) for example. In order to stabilise the position of the capsule (6) relative to the platform (7) the hydraulic means (9, 31, 33, 36, 40, 41, 52) is dynamically controlled to compensate for movement of the vessel (1) such that the capsule (6) will remain substantially in the selected spatial position relative to the platform (7). The capsule (6) may include a control system which enables an operator to statically position the capsule (6) through control of the overall system. The mounting (3) on the deck (2) of a vessel (1) carries a gimbal structure (30) which supports the arm (4). The gimbal structure (30) is controlled in attitude by a series of rams (31). The arm (4) is mounted on the gimbal structure (30) to pivot about a transverse axis (43) and controlled by rams (40 and 41). The rams (40 and 41) thus control the luffing of the arm (4). The arm (4) supports the boom (5) which may pivot around a transverse axis (50) controlled by a boom operating ram (52).
摘要:
The invention relates to a drive arrangement containing a rotational mass which is supported so as to be rotatable about a first axis; a bearing element supported so as to be rotatable about a second axis extending perpendicular to the first axis having a bearing for supporting the rotational mass, an oscillating body supported so as to be rotatable about a third axis perpendicular to the second axis having a bearing for supporting the bearing element, a drive provided on the oscillating body for generating a rotary movement of the bearing element about the second axis, a housing having a bearing for supporting the oscillating body, and a brake fixed to the housing for braking the rotary movement of the oscillating body in such a way that with each braking operation a driving force is transmitted to the housing.
摘要:
Some implementations feature a mast stabilizing device that includes a mast comprising a first portion and a second portion, a sensor coupled to the first portion of the mast, and a pivot structure coupled to the mast. The pivot structure is configured to allow the mast to pivot in the mast stabilizing device. The mast is coupled to the pivot structure so as to pivot along a pivot portion of the mast. The mast stabilizing device also includes a mass coupled to the second portion of the mast. The mass is configured to counteract a force applied to the first portion of the mast. The mast stabilizing device further includes a platform coupled to the pivot structure, the platform configured to operate on a body of water. In some implementations, the pivot structure is a gimbal device.
摘要:
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 stabiliser for attenuating rotation of the body about at least one stabilising axis.