Variable rotary mass vibration suppression system
AssigneeMoog Inc.
InventorJohn KOPP
Life of this patent
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Abstract
A vibration suppression unit for an aircraft comprising a vibration control frame adapted to be mounted to the aircraft and to rotate about a central axis, a first motor configured to rotate the vibration control frame about the central axis, a second motor configured to rotate a first and second center of mass about a first and second axis or rotation, a third motor configured to adjust a variable distance between the first and second centers of mass and the first and second axis of rotation, respectively, and a controller for receiving input signals and outputting command signals to the first, second and third motors.
Claims50
A vibration suppression system comprising:
- a first vibration control mass having a first center of mass;
- a first Cg input driver rotationally coupled to said first mass such that said first center of mass rotates about a first Cg axis with selective rotation of said first Cg input driver about a first Cg input drive axis;
- said first center of mass offset a first Cg radial distance from said first Cg axis;
- a first mass input driver rotationally coupled to said first mass such that said first Cg axis rotates about a first mass axis with selective rotation of said first mass input driver about a first mass input drive axis;
- said first Cg axis offset a first mass radial distance from said first mass axis;
- said first center of mass having a selectively variable first displacement angle defined by the inclusive angle between a line extending between said first Cg axis and said first center of mass and a line extending between said first Cg axis and said first mass axis;
- said first mass axis offset a first unit radial distance from a unit center axis;
- a second vibration control mass having a second center of mass;
- a second Cg input driver rotationally coupled to said second mass such that said second center of mass rotates about a second Cg axis with selective rotation of said second Cg input driver about a second Cg input drive axis;
- said second center of mass offset a second Cg radial distance from said second Cg axis;
- a second mass input driver rotationally coupled to said second mass such that said second Cg axis rotates about a second mass axis with selective rotation of said second mass input driver about a second mass input drive axis;
- said second Cg axis offset a second mass radial distance from said second mass axis;
- said second center of mass having a selectively variable second displacement angle defined by the inclusive angle between a line extending between said second Cg axis and said second center of mass and a line extending between said second Cg axis and said second mass axis;
- and
- said second mass axis offset a second unit radial distance from said unit center axis;
- wherein said first vibration control mass and said second vibration control mass are controllable to produce a vibration control force vector having a controllable magnitude about said unit center axis.
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Dependencies are inferred from the claim text.