TAVAC

FLY IN COMFORT

 

The main aim of the TAVAC project is the development of novel integrated active technologies for noise & vibration reduction and their integration into the aircraft’s fuselage and cabin. This is accommodated in two discrete, but highly related directions: (1) Active vibration isolation and control of engines and aerodynamically induced loads; (2) Active noise control. Each of the approaches is subjected to its own specific performance and weight limitations.

The main objectives of the TAVAC project were: (1) The development of an Active Vibration Control System to accommodate engine vibrations using active engine mounts; (2) The development of an Active Noise Cancelation System to reduce noise discomfort in the passenger area; (3) The development of an Active Vibration Control System to attenuate aerodynamic vibrations transferred to passenger area via the fuselage floor.

WHAT WE DID

We based our approach in designing & implementing three individual light-weight systems, with each one targeting a specific noise-disturbance source: (1) An Active Vibrations Control System for engine vibrations reduction; (2) An Active anti-Noise Control System for engine vibration reduction; (3) An Active Fuselage-floor Anti-vibration Control System.

To reduce the engine vibrations we implemented active engine mount components in the form of piezoceramic tack actuators, active vibration control in the part of the fuselage near the engine mounts by using piezo stacks & TMAs for vibration suppression, as well as passive mount components in the form of a passive damper to attenuate high-frequencies and to provide redundancy.

We approached the engine vibration reduction by developing loudspeakers of a novel design based on the Electro Active Polymers that offer extremely low weight, high electro-mechanical energy conversion efficiency, frequency selectivity, spatial directivity, as well as the ability to be embedded through 3D printing in existing infrastructure.

WHAT WE ACHIEVED

As more powerful & efficient aircraft engines are introduced and new light-weight airframes are adopted, the intensity of engine and airframe vibrations is increased while the damping capacity of the fuselage is reduced. As a result, the vibration and noise levels in the cabin are also increased, setting a barrier in the improvement of airframe and engine efficiency.

By implementing the Tavac project, we managed to achieve a huge improvement in passenger comfort by introducing & employing novel integrated active technologies of noise and vibration reduction.

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