Active force generation system for minimizing vibration in a rotating system
AssigneeSikorsky Aircraft Corporation
InventorWilliam A. Welsh
Life of this patent
Estimating the term…
Abstract
A method and device for reducing vibratory noise in a system with an integral rotating member includes independently operable drive systems for controlling the angular velocity of at least two independently rotatable masses. Control signals manipulate the drive system to rotate each mass at optimal speed, direction and phase to reduce noise induced in the system by the rotating member.
Claims24
A rotary-wing aircraft rotor system which rotates about an axis of rotation, comprising:
- a rotor system having an N number of blades which rotates about an axis of rotation at a rotational speed of 1P such that said main rotor system produces NP vibrations;
- a sensor system which senses the NP vibrations;
- a multiple of masses coaxially disposed with said rotor system, said multiple of masses includes a first mass and a second mass;
- a first drive system to spin said first mass about said axis of rotation at a first angular velocity;
- a second drive system to spin said second mass about said axis of rotation at a second angular velocity;
- and
- a control system in communication with said sensor system and said drive system, said control system operable to identify variations of the NP vibrations to control the angular velocity of at least one of said multiple of masses to reduce the NP in-plane vibrations.
A rotary-wing aircraft rotor system which rotates about an axis of rotation, comprising:
- a rotor system having an N number of blades which rotates about an axis of rotation at a rotational speed of 1P, such that said main rotor system produces NP vibrations;
- a sensor system which senses the NP vibrations;
- a multiple of masses coaxially disposed with said rotor system;
- a drive system to independently spin each of said multiple of masses about said axis of rotation at an independent angular velocity;
- and
- a control system in communication with said sensor system and said drive system, said control system operable to identify variations of the NP vibrations to control the angular velocity of at least one of said multiple of masses to reduce the NP vibrations.
A vibration isolation system for reducing vibrations in a rotating system rotatable about an axis of rotation, comprising:
- a multiple of masses coaxially disposed about an axis of rotation of a rotating system, each of said multiple of masses radially offset from said axis of rotation;
- a drive system to independently spin each of said multiple of masses about said axis of rotation at an angular velocity;
- and
- a control system in communication with said drive system to control the angular velocity of each of said multiple of masses to reduce vibrations generated by the rotating system.
Dependencies are inferred from the claim text.