Hybrid active-passive noise and vibration control system for...

Details Hybrid active-passive noise and vibration control system for... Hybrid active-passive noise and vibration control system for...

G - Physics

10

K

G10K 11/178 (2006.01) B64C 1/40 (2006.01)

Patent

CA 2269424

A hybrid active-passive system (20) for reducing noise within a passenger compartment and vibration of a fuselage of a vehicle, such as an aircraft (turboprop, turbofan, or helicopter). The hybrid active-passive system (20) includes, in combination: an active acoustic producer such as a loudspeaker (35), Active Vibration Absorber (AVA) (34), or active absorber assembly (39) for producing antinoise within the compartment (42), and a passive resonant device, such as a passive Tuned Vibration Absorber (TVA) (36), or passive TVA assembly (37) for controlling vibration of the fuselage or structural supports interconnecting the disturbance source (e.g. power plants (26), propellers (28a), gearbox (57), main rotor (28m), tail rotor (28t)) and the fuselage wall (25).

L'invention porte sur un système actif-passif hybride (20) permettant de réduire le bruit dans un compartiment passager, ainsi que les vibrations du fuselage d'un aéronef (turbopropulseur, turbine ou hélicoptère). Le système actif-passif hybride (20) comprend, en combinaison, un générateur acoustique actif tel qu'un haut-parleur (35), un absorbeur de vibrations actif (34) ou un ensemble absorbeur actif (39) permettant de produire un antibruit dans le compartiment (42), et un dispositif résonant passif tel qu'un absorbeur de vibrations accordé (36), ou un ensemble absorbeur de vibrations accordé passif (37) permettant de réguler les vibrations du fuselage ou des supports structuraux interconnectant la source de perturbations (telle que groupes de propulsion (26), propulseurs (28a), boîte de vitesse (57), rotor principal (28m), rotor de queue (28t)) et la paroi (25) du fuselage.

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