Device for damping the vibrations of a structure subjected to dynamic stresses
First Claim
1. A device (1) for damping the vibrations of a structure (2) subjected to dynamic stresses, of the type including a main mass (3) mounted on an elastic plate (4) which is itself fitted into the structure (2) whose vibrations are to be damped, the position of said main mass (3) along said plate (4) being initially adjusted in such a way that the natural frequency (F) of the damping device (1) is equal to the frequency (Fe) of the vibrations of the structure (2) which are to be damped, wherein, in order to match the natural frequency (F) of the damping device (1) continuously to the frequency (Fe) of the vibrations of the structure (2) which are to be damped, the damping device (1) additionally comprises at least one auxiliary mass (5) guided axially without any radial play in a sleeve (13) connected to said main mass (3) by means of a support (6) and capable of being moved at least substantially parallel to said elastic plate (4) by a motor (7) mounted on said support (6) and receiving control pulses from a computer (9), said control pulses being computed from signals output by at least one of two accelerometers (10, 11) respectively measuring the vibrations of said structure (2) and those of said main mass (3).
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Accused Products
Abstract
The present invention relates to a device (1) for damping the vibrations of a structure (2) subjected to dynamic stresses, of the type including a main mass (3) mounted on an elastic plate (4) which is itself fitted into the structure (2) whose vibrations are to be damped.
According to the invention, the damping device (1) additionally comprises at least one auxiliary mass (5) connected to said main mass (3) and capable of being moved at least substantially parallel to said elastic plate (4) as a function of the control pulses which are received from a computer (9) and are computed from signals output by a first (10) and/or a second accelerometer (11) respectively measuring the vibrations of said structure (2) and those of said main mass (3).
22 Citations
13 Claims
- 1. A device (1) for damping the vibrations of a structure (2) subjected to dynamic stresses, of the type including a main mass (3) mounted on an elastic plate (4) which is itself fitted into the structure (2) whose vibrations are to be damped, the position of said main mass (3) along said plate (4) being initially adjusted in such a way that the natural frequency (F) of the damping device (1) is equal to the frequency (Fe) of the vibrations of the structure (2) which are to be damped, wherein, in order to match the natural frequency (F) of the damping device (1) continuously to the frequency (Fe) of the vibrations of the structure (2) which are to be damped, the damping device (1) additionally comprises at least one auxiliary mass (5) guided axially without any radial play in a sleeve (13) connected to said main mass (3) by means of a support (6) and capable of being moved at least substantially parallel to said elastic plate (4) by a motor (7) mounted on said support (6) and receiving control pulses from a computer (9), said control pulses being computed from signals output by at least one of two accelerometers (10, 11) respectively measuring the vibrations of said structure (2) and those of said main mass (3).
Specification