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US 6,889,803 B2Granted
Torsional active vibration control system
AssigneeAmerican Axle & Manufacturing, Inc.
InventorsDavid Paul Schankin, Mark Norman Ranek, Daniel Victor Sagady
Life of this patent
Estimating the term…
Abstract
A damper mechanism for absorbing torsional vibrations in a rotating shaft. The damper mechanism includes a vibration absorbing mechanism and at least one actuator that is controllable to affect the torsional vibration absorbing characteristics of the vibration absorbing mechanism.
Claims20
A dynamic damper mechanism for damping torsional vibration in a shaft, the dynamic damper mechanism comprising:
- a damper device having a mass member, an attachment member, a vibration absorbing mechanism and at least one actuator, the attachment member being adapted to be coupled for rotation with the shaft, the mass member being disposed circumferentially about the attachment member, the vibration absorbing mechanism resiliently coupling the mass member to the attachment member and having a torsional vibration absorbing characteristic, the actuator being coupled to the vibration absorbing mechanism and being operable in at least two conditions, each condition affecting the torsional vibration absorbing characteristic of the vibration absorbing mechanism;
- a first sensor that is adapted to sense a rotational position of the shaft and generate a position signal in response thereto;
- a second sensor that is adapted to sense a magnitude of the torsional vibration in the shaft and generate a vibration signal in response thereto;
- and
- a controller coupled to the first and second sensors and the at least one actuator, the controller receiving the position signal and the vibration signal and controlling the at least one actuator in response thereto to cause the at least one actuator to affect the torsional vibration absorbing characteristic of the vibration absorbing mechanism so as to damp the torsional vibration in the shaft.
2 more elements
A shaft assembly for transmitting rotary power, the shaft assembly comprising:
- a shaft structure;
- a damper device having a mass member, an attachment member, a vibration absorbing mechanism and at least one actuator, the attachment member being adapted to be coupled for rotation with the shaft structure, the mass member being disposed circumferentially about the attachment member, the vibration absorbing mechanism resiliently coupling the mass member to the attachment member and having a torsional vibration absorbing characteristic, the actuator being coupled to the vibration absorbing mechanism and being operable in at least two conditions, each condition affecting the torsional vibration absorbing characteristic of the vibration absorbing mechanism;
- a first sensor for sensing a rotational position of the shaft and generating a position signal in response thereto;
- a second sensor for sensing a magnitude of torsional vibration in the shaft and generating a vibration signal in response thereto;
- and
- a controller coupled to the first and second sensors and the at least one actuator, the controller receiving the position signal and the vibration signal and controlling the at least one actuator in response thereto to cause the at least one actuator to affect the torsional vibration absorbing characteristic of the vibration absorbing mechanism so as to damp the torsional vibration in the shaft structure.
3 more elements
A shaft assembly for transmitting rotary power, the shaft assembly comprising:
- a shaft structure;
- a damper device having a mass member, an attachment member a vibration absorbing mechanism and at least one actuator, the mass member being disposed circumferentially about the shaft structure, the vibration absorbing mechanism resiliently coupling the mass member to the shaft structure and having a torsional vibration absorbing characteristic, the actuator being coupled to the vibration absorbing mechanism and being operable in at least two conditions, each condition affecting the torsional vibration absorbing characteristic of the vibration absorbing mechanism;
- a first sensor for sensing a rotational position of the shaft and generating a position signal in response thereto;
- a second sensor for sensing a magnitude of the torsional vibration in the shaft and generating a vibration signal in response thereto;
- and
- a controller coupled to the first and second sensors and the at least one actuator, the controller receiving the position signal and the vibration signal and controlling the at least one actuator in response thereto to cause the at least one actuator to affect the torsional vibration absorbing characteristic of the vibration absorbing mechanism so as to damp the torsional vibration in the shaft structure.
3 more elements
Dependencies are inferred from the claim text.