Active tuned vibration absorber
First Claim
1. An active tuned vibration absorber for reducing vibrations in a structure, the vibration absorber comprising:
- a mount for attachment to the structure;
a moveable mass;
a spring arrangement connected between the mass and the mount;
an actuator arrangement for applying a force between the mass and the mount;
a first sensor for providing a first measurement indicative of a force exerted between the structure and the mount;
a second sensor for providing a second measurement indicative of an acceleration of the structure at or proximate to the mount; and
a control system for generating an actuator driving signal for driving the actuator using the first and second measurement,wherein only one of a spring arrangement and actuator arrangement is directly connected between the mass and the mount via the first sensor, andwherein the control system is operable to generate the actuator driving signal to cause the first measurement and second measurement to conform to a target relationship such that the active tuned vibration absorber dissipates energy transferred from the structure, andwherein, in isolation from the actuator arrangement and control system, the moveable mass and the spring arrangement form a first resonant system having a first Q factor and, when controlled by and combined with the actuator arrangement and control system, the moveable mass and the spring arrangement form a second resonant system with a second Q factor, and wherein the second Q factor is larger than the first Q factor.
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0 Petitions
Accused Products
Abstract
An active tuned vibration absorber (100) is disclosed for reducing vibrations in a structure, the vibration absorber comprising: a mount (104) for attachment to the structure; a moveable mass (106); a spring arrangement (108) connected between the mass and the mount; an actuator arrangement (110) for applying a force between the mass and the mount; a first sensor (112) for providing a first measurement indicative of a force exerted between the structure and the mount; a second sensor (114) for providing a second measurement indicative of an acceleration of the structure at or proximate to the mount; and a control system (116) for generating an actuator driving signal for driving the actuator using the first and second measurement, wherein the control system is operable to generate the actuator driving signal to cause the first measurement and second measurement to conform to a target relationship.
16 Citations
25 Claims
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1. An active tuned vibration absorber for reducing vibrations in a structure, the vibration absorber comprising:
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a mount for attachment to the structure; a moveable mass; a spring arrangement connected between the mass and the mount; an actuator arrangement for applying a force between the mass and the mount; a first sensor for providing a first measurement indicative of a force exerted between the structure and the mount; a second sensor for providing a second measurement indicative of an acceleration of the structure at or proximate to the mount; and a control system for generating an actuator driving signal for driving the actuator using the first and second measurement, wherein only one of a spring arrangement and actuator arrangement is directly connected between the mass and the mount via the first sensor, and wherein the control system is operable to generate the actuator driving signal to cause the first measurement and second measurement to conform to a target relationship such that the active tuned vibration absorber dissipates energy transferred from the structure, and wherein, in isolation from the actuator arrangement and control system, the moveable mass and the spring arrangement form a first resonant system having a first Q factor and, when controlled by and combined with the actuator arrangement and control system, the moveable mass and the spring arrangement form a second resonant system with a second Q factor, and wherein the second Q factor is larger than the first Q factor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. An active tuned vibration absorber for reducing vibrations in a structure, the vibration absorber comprising:
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a mount for attachment to the structure; a moveable mass; a spring arrangement connected between the mass and the mount; an actuator arrangement for applying a force between the mass and the mount; a force sensor attached to or proximate the mount for outputting a measurement indicative of a force exerted between the structure and the mount; and a control system for generating a drive signal for the actuator arrangement using the measurement, the actuator drive signal being generated to cause the mechanical impedance of the vibration absorber to converge to a target mechanical impedance substantially equivalent to the mechanical impedance of a passive tuned device such that the active tuned vibration absorber dissipates energy transferred from the structure, wherein only one of the spring arrangement and actuator arrangement is directly connected between the mass and the mount via the first sensor, and wherein, in isolation from the actuator arrangement and control system, the moveable mass and the spring arrangement form a first resonant system having a first Q factor and, when controlled by and combined with the actuator arrangement and control system, the moveable mass and the spring arrangement form a second resonant system with a second Q factor, and wherein the second Q factor is larger than the first Q factor.
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25. A method of reducing vibrations in a structure, comprising:
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providing a mount for attachment to the structure; providing a moveable mass; providing a spring arrangement connected between the mass and the mount; providing an actuator arrangement for applying a force between the mass and the mount; providing a first sensor for providing a first measurement indicative of a force exerted between the structure and the mount; providing a second sensor for providing a second measurement indicative of an acceleration of the structure at or proximate to the mount; and providing a control system for generating an actuator driving signal for driving the actuator using the first and second measurement, wherein only one of the spring arrangement and actuator arrangement is directly connected between the mass and the mount via the first sensor, and wherein the control system is operable to generate the actuator driving signal to cause the first measurement and second measurement to conform to a target relationship such that the active tuned vibration absorber dissipates energy transferred from the structure, and wherein, in isolation from the actuator arrangement and control system, the moveable mass and the spring arrangement form a first resonant system having a first Q factor and, when controlled by and combined with the actuator arrangement and control system, the moveable mass and the spring arrangement form a second resonant system with a second Q factor, and wherein the second factor is larger than the first Q factor.
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Specification