Advanced study for active noise control in aircraft

Objective

The applications of piezo ceramic patches on the primary structure have demonstrated that this approach can be a potential alternative to the classical passive dynamic vibration absorbers and to the loudspeakers.

The research in advanced actuator design showed promising results for the piezo-ceramic based actuators and electrodynamic shakers. Flight test with the Dornier 328 as well as the ground tests in the Saab 340 ground test section in combination with loudspeakers showed very good results. However, for future applications of these approaches the actuators need more power.

The results obtained using speaking panels in real flight are very encouraging. Additional works are needed to overcome the two phenomena high driving voltage and some non-linear behaviour in order to raise this technology to an industrial state.

Neural network and genetic algorithm modelling has provided good locations of sensors and actuators at lower computation costs than others analytical algorithms.

Extensive testing and detailed F.E-modelling was performed in order to construct accurate vibro-acoustic models of the structural and acoustical responses. The results obtained during Saab 340 ground test section showed excellent reductions and the feasibility of this approach.

During the study 4 control algorithms were designed and selected for ground and flight tests: The robust vibration control algorithm exhibited good convergence characteristics both for rectified frame element and in the ATR42 mock-up tests.
The twin-reference algorithm has proven to be valuable even in flight conditions with the synchrophaser turned off. The results of Saab 340 mock-up tests showed the need of multiple reference algorithms for real applications.
The remote microphone algorithm, capable of reducing noise at positions well away from the error microphones, reaches noise reductions very close to those achieved with a LMS algorithm.
The robust acoustic control algorithm was able to reduce the noise field significantly even during fast changes in RPM and during flight with different propellor RPM.

In total three different full scale test campaigns were conducted at the end of the project, successfully verifying various different advanced developments in the field of active noise control.

Fields of science

• engineering and technology › mechanical engineering › vehicle engineering › aerospace engineering › aircraft
• natural sciences › physical sciences › acoustics
• engineering and technology › electrical engineering, electronic engineering, information engineering › electronic engineering › sensors
• natural sciences › computer and information sciences › artificial intelligence › computational intelligence

Programme(s)

• FP3-AERO 1C - Specific programme of research and technological development in the field of industrial and materials technologies - Aeronautics research -, 1990-1994

Topic(s)

Data not available

Call for proposal

Data not available

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

Dornier Luftfahrt GmbH

Address

An Der Bundesstraße 31
88039 Friedrichshafen
Germany

Participants (21)

Alenia Aerospazio - Un' Azienda Finmeccanica SpA

Italy

Address

Viale Dell'aeronautica 1
80038 Pomigliano D'arco

Aérospatiale Société Nationale Industrielle SA

France

Address

316 Route De Bayonne
31060 Toulouse

Business Unit of TNO Built Environment and Geosciences

Netherlands

Address

Van Mourik Broekmanweg 6
2628 XE Delft

Links

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE

France

Address

Chemin Joseph Aiguier 31
13402 Marseille

CENTRO ITALIANO RICERCHE AEROSPAZIALI SCPA

Italy

Address

Via Maiorise
81043 Capua

Daimler-Benz Aerospace AG

Germany

Address

22876 Wedel

EADS - CONSTRUCCIONES AERONAUTICAS S.A.

Spain

Address

S/n,avenida John Lennon S/n
28906 Getafe

Eidgenössische Technische Hochschule - ETH Zürich

Switzerland

Address

3,tannenstrasse 3
8092 Zürich

FFA - The Aeronautical Research Institute of Sweden

Sweden

Address

161 11 Bromma

Fokker Aircraft BV

Netherlands

Address

15,hoogoorddreef
1100 AE Amsterdam

INSTITUTO SUPERIOR TECNICO

Portugal

Address

1,avenida Rovisco Pais 1
1049-001 Lisboa

KATHOLIEKE UNIVERSITEIT LEUVEN

Belgium

Address

300 B,celestijnenlaan 300 B
3001 Heverlee

LEUVEN MEASUREMENTS AND SYSTEMS INTERNATIONAL NV

Belgium

Address

65,interleuvenlaan 68
3001 Heverlee

METRAVIB RECHERCHE DÉVELOPPEMENT SERVICE SA

France

Address

Chemin Des Ormeaux 200
69760 Limonest

Matra Cap Systèmes

France

Address

6 Rue Dewoitine
78142 Vélizy-villacoublay

Saab Aircraft AB

Sweden

Address

581 88 Linköping

TECHNICAL UNIVERSITY OF DENMARK

Denmark

Address

Anker Engelundsvej 1, Building 101
2800 Lyngby

THE PROVOST, FELLOWS AND SCHOLARS OF THE COLLEGE OF THE HOLY AND UNDIVIDED TRINITY OF QUEEN ELIZABETH NEAR DUBLIN HEREINAFTER TRINITY COLLEGE DUBLIN

Ireland

Address

Parsons Building, Trinity College
2 Dublin

University of Karlskrona-Ronneby

Sweden

Address

372 25 Ronneby

University of Patras

Greece

Address

Rion
26500 Patras

Università degli Studi di Napoli Federico II

Italy

Address

Via Claudio 21
80125 Napoli