Apparatus for reducing vibration on a ship
AssigneeAlstom Entreprise SA
InventorsJean-Paul Huot-Marchand, Jean-Philippe Nicod
Life of this patent
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Abstract
An apparatus for reducing vibration on a ship with at least two drive shafts by determining and utilizing an optimum angular offset which corresponds to a minimum vibration level. The apparatus comprises a servo-control circuit for servo-controlling the angular difference between the two shafts to a reference value. A calibration circuit determines the optimum angular offset between the shafts corresponding to the minimum vibration level. A control circuit responds to a control signal by actuating in succession the calibration circuit and then the servo-control circuit, wherein the optimum angular offset is set to the reference value.
Claims14
Apparatus for reducing vibration on a ship provided with at least two drive shafts, the apparatus comprising:
- servo-control means for servo-controlling an angular difference of said two shafts based on a reference value;
- calibration means for finding an optimum angular offset between the shafts which corresponds to a minimum value of a vibration level of said ship;
- and
- control means for responding to a control signal to actuate in succession said calibration means and then said servo-control means, wherein said reference value is set to said optimum angular offset.
Apparatus for reducing vibration on a ship provided with at least a first drive shaft and a second drive shaft, the apparatus comprising:
- a first regulation circuit for receiving a reference value and servo-controlling the angular difference of said first and second drive shafts based on said reference value;
- a vibration sensor for detecting a vibration level of the ship;
- and
- a control circuit for receiving the vibration level from said vibration sensor, determining an optimum angular offset between the shafts corresponding to a minimum value of the vibration level and setting said reference value to correspond to said optimum angular offset.
Dependencies are inferred from the claim text.