Torsional active vibration control system

• US 20050051402A1
• Filed: 10/18/2004
• Published: 03/10/2005
• Est. Priority Date: 10/11/2002
• Status: Active Grant

• Current Assignee: Daniel Victor Sagady, David Paul Schankin, Mark Norman Ranek
• Original Assignee: Daniel Victor Sagady, David Paul Schankin, Mark Norman Ranek
• Inventors: Schankin, David Paul, Sagady, Daniel Victor, Ranek, Mark Norman
• Granted Patent: US 7,004,291 B2
• Time in Patent Office: Days
• US Class Current: 188/379
• CPC Class Codes: F16C 2326/06 Drive shafts in general B60K
• CPC Class Codes: F16C 3/023 made of several parts, e.g. by welding
• CPC Class Codes: F16F 15/005 using electro- or magnetostrictive actuation means generating of mechanical vibrations operating with electrostriction B06B1/06, with magnetostriction B06B1/08; vehicle suspension arrangements characterised by use of piezoelectric elements B60G17/01941; piezoelectric, electrostrictive and magnetostrictive devices per se H10N30/00
• CPC Class Codes: F16F 15/10 Suppression of vibrations in rotating systems by making use of members moving with the system by balancing F16F15/22 ; yielding couplings F16D3/00 ; with flywheels acting variably or intermittently F16H ; construction providing resilience or vibration-damping for gear elements F16H55/14
• CPC Class Codes: F16F 15/1212 disposed around axis of rotation
• CPC Class Codes: F16F 15/126 consisting of at least one annular element surrounding the axis of rotation
• CPC Class Codes: F16F 15/1414 Masses driven by elastic elements F16F15/145, F16F15/1464 take precedence
• CPC Class Codes: F16F 15/18 using electric, magnetic or electromagnetic means suppression of vibrations of rotating systems by use of non-rotating magnetic or electromagnetic means F16F15/03; dynamo-electric devices H02K; control effected upon generator excitation circuit to reduce harmful effects of overloads or transients H02P9/10

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.

Claims

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.

2. The method of claim 1, wherein the at least one characteristic includes a rotational speed of the shaft.

3. The method of claim 1, wherein a vibration sensor is employed to at least partially determine the at least one characteristic.

4. The method of claim 1, 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.

5. The method of claim 4, wherein the actuator includes a magnostrictive member having a dimension that varies in accordance with a control signal that is employed to control the actuator.

6. The method of claim 5, wherein the vibration absorbing mechanism includes a resilient member that extends radially outwardly between the attachment member and the mass member in a compressed state, the magnostrictive member being operable for varying a degree to which the resilient member is compressed.

7. The method of claim 6, wherein the vibration absorbing mechanism further comprises a plurality of second resilient members, each of the second resilient members extending radially outwardly between the attachment member and the mass member in a compressed state and circumferentially spaced apart from one another and the resilient member.

8. The method of claim 7, wherein a second magnostrictive member is coupled to each of the second resilient members, each of the second magnostrictive members being operable for varying a degree to which an associated one of the second resilient members is compressed.

9. The method of claim 8, wherein controlling the actuator includes independently controlling the magnostrictive member and each of the second magnostrictive members.

10. A method comprising:

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.

11. The method of claim 10, wherein the amount of torsional vibration is sensed.

12. The method of claim 11, wherein the amount of torsional vibration is based on a rotational speed of the shaft.

13. The method of claim 10, 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.

14. The method of claim 13, wherein the actuator includes a magnostrictive member having a dimension that varies in accordance with a control signal that is employed to control the actuator.

15. The method of claim 14, wherein the vibration absorbing mechanism includes a resilient member that extends radially outwardly between the attachment member and the mass member in a compressed state, the magnostrictive member being operable for varying a degree to which the resilient member is compressed.

16. The method of claim 15, wherein the vibration absorbing mechanism further comprises a plurality of second resilient members, each of the second resilient members extending radially outwardly between the attachment member and the mass member in a compressed state and circumferentially spaced apart from one another and the resilient member.

17. The method of claim 16, wherein a second magnostrictive member is coupled to each of the second resilient members, each of the second magnostrictive members being operable for varying a degree to which an associated one of the second resilient members is compressed.

18. The method of claim 17, wherein controlling the actuator includes independently controlling the magnostrictive member and each of the second magnostrictive members.