Active noise and vibration control, especially in aircraft

Details Active noise and vibration control, especially in aircraft Active noise and vibration control, especially in aircraft

F - Mech Eng,Light,Heat,Weapons

16

F

F16F 15/02 (2006.01) B64C 1/40 (2006.01) B64D 47/00 (2006.01) F16F 15/00 (2006.01) G10K 11/16 (2006.01) G10K 11/178 (2006.01)

Patent

CA 2235309

A system for controlling noise and/or vibration in a structure, especially an aircraft fuselage, of the type having structural components which include stiffening members fixed to a wall or skin. A series of sensors attached to the structure is capable of registering noise or changes in accelerations or strains in the structure caused by noise or vibrations in the environment, and actuators of adaptive material, for example formed of piezoelectric elements, are connected to the sensors by control means for causing the actuators to counteract noises or vibrations sensed by the sensors. In accordance with the invention the actuators are fixed to the stiffening members. Preferably, the actuators are fixed to flanges of the stiffening members which are spaced from the wall or skin by a web. In an aircraft fuselage, some actuators are fixed to stiffening members which extend across other stiffening members.

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