Method and device for active constrained layer damping for vibration and sound control
OwnerAmr M. Bazinventor
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Abstract
A new method and device for actively-controlled constrained layer (ACLD) treatment which can be used as an effective means for damping out vibrations and sounds from flexible structures are described. The ACLD treatment consists of a visco-elastic damping layer which is sandwiched between two piezo-electric layers. The three-layer composite ACLD, when bonded to a surface which is subject to vibrational and/or sound disturbances, acts as a smart constraining layer damping treatment with built-in sensing and actuation capabilities. The sensing capability is provided by the piezo-electric layer bonded to the surface of the flexible structure, whereas the actuation or control capability is generated by the other piezo-electric layer which acts as an active constraining layer.
Claims7
A device for actively controlling the damping of vibration or sound from a flexible structure, comprising:
- a. a sensor layer in contact with the structure for detecting the vibration or sound of said structure,
- b. at least one vibration or sound damping layer, the vibration or sound damping layer in contact with the sensor layer and
- c. an active constraining layer, the active constraining layer in contact with said at least one vibration or sound damping layer for actively controlling the damping of vibration or sound in response to the detection from said sensor layer;
- wherein said active constraining layer is capable of being activated by a controller.
Dependencies are inferred from the claim text.