Active cancellation of noise at gear mesh frequencies for a gear assembly under load
First Claim
1. An apparatus having active noise cancellation of gear mesh noise of a gear assembly including at least a first drive shaft having a first gear disposed thereon and a second gear, comprising:
- a prime mover actuating said first drive shaft having said first gear disposed thereon, said first gear engaging said second gear to drive a load;
at least one error signal sensor sensing vibration and/or noise of said first gear meshing with said second gear, said at least one error signal sensor providing an error signal indicative of the vibration and/or noise sensed at said first gear meshing with said second gear;
a control mechanism receiving said error signal from said at least one error signal sensor, said control mechanism processing said error signal to translate said error signal into a cancellation torque; and
a torque source applying said cancellation torque to at least said first drive shaft.
11 Assignments
0 Petitions
Accused Products
Abstract
A method and apparatus to cancel gear vibration and noise by imposing a canceling drive torque or force on a driven gear set. Sensors receive information and produce an error signal representative of the vibration and/or noise generated at meshing gears. The error signal indicative of vibration and/or noise information is provided to a control mechanism that processes the noise information to generate a corresponding drive torque. The drive torque corresponding to the noise information is applied to a drive shaft or through a power supply to reduce vibration and noise of the gear assembly at gear meshing frequencies.
34 Citations
17 Claims
-
1. An apparatus having active noise cancellation of gear mesh noise of a gear assembly including at least a first drive shaft having a first gear disposed thereon and a second gear, comprising:
-
a prime mover actuating said first drive shaft having said first gear disposed thereon, said first gear engaging said second gear to drive a load; at least one error signal sensor sensing vibration and/or noise of said first gear meshing with said second gear, said at least one error signal sensor providing an error signal indicative of the vibration and/or noise sensed at said first gear meshing with said second gear; a control mechanism receiving said error signal from said at least one error signal sensor, said control mechanism processing said error signal to translate said error signal into a cancellation torque; and a torque source applying said cancellation torque to at least said first drive shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for cancelling noise from a gear assembly meshing in a system having a prime mover driving said gear assembly, said gear assembly including at least a first drive shaft having a first gear disposed thereon and a second gear, said method comprising the steps of:
-
sensing noise/vibration from said gear assembly meshing and producing a vibration signal indicative of frequencies and respective amplitudes of noise/vibration sensed; processing said vibration signal to generate a modulating torque signal corresponding to frequencies and respective amplitudes of noise/vibration sensed; and applying said modulating torque signal to at least one of said prime mover and said first drive shaft. - View Dependent Claims (12, 13, 14, 15, 16, 17)
-
Specification