Torsional active vibration control system
First Claim
Patent Images
1. A method comprising:
- determining a rotational position of a rotating shaft;
determining at least one characteristic indicative of an amount of torsional vibration in the rotating shaft; and
controlling an actuator that is coupled to the rotating shaft based on the rotational position of the rotating shaft and the at least one characteristic;
wherein the actuator is associated with a damper device, the damper device having a mass member, an attachment member and a vibration absorbing mechanism, the attachment member being 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.
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Abstract
A method for damping torsional vibrations in a rotating shaft. The method includes coupling an actuator to a shaft; rotating the shaft; determining an amount of torsional vibration in the shaft; and controlling the actuator in response to the amount of torsional vibration and a rotational position of the shaft to damp the torsional vibration in the shaft.
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Citations
20 Claims
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1. A method comprising:
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determining a rotational position of a rotating shaft; determining at least one characteristic indicative of an amount of torsional vibration in the rotating shaft; and controlling an actuator that is coupled to the rotating shaft based on the rotational position of the rotating shaft and the at least one characteristic; wherein the actuator is associated with a damper device, the damper device having a mass member, an attachment member and a vibration absorbing mechanism, the attachment member being 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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coupling an actuator to a shaft; rotating the shaft; determining an amount of torsional vibration in the shaft; and controlling the actuator in response to the amount of torsional vibration and a rotational position of the shaft to damp the torsional vibration in the shaft; wherein the actuator is associated with a damper device, the damper device having a mass member, an attachment member and a vibration absorbing mechanism, the attachment member being 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. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method comprising:
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providing an assembly having a shaft and a damper, the damper including an outer member that is disposed about the shaft and an actuator that is disposed between the shaft and the outer member; determining a rotational position of the shaft; determining at least one characteristic indicative of an amount of vibration input to or exiting the assembly; and controlling the actuator to affect its length based on the rotational position of the shaft and the at least one characteristic. - View Dependent Claims (18, 19, 20)
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Specification