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Active Noise Control in Aircraft: Algorithms and Applications
Responsible organisation
1998 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

The thesis consists of five papers which are divided into three main parts. Parts A and B deal with active noise control in a propeller aircraft application, whereas Part C deals with active noise control in a helicopter application. Part A presents a comparison between single- and multiple-reference controllers, while Part B deals with different multiple-reference, multiple-channel algorithms. Finally, Part C presents a hybrid headset. The five papers comprise: Part A1: Comparison between a Single-- versus a Twin--Reference Controller in Narrowband ANC Applications. Part A2: Performance of a Multiple- versus a Single-Reference MIMO ANC Algorithm based on a Dornier 328 Test Data Set. Part B1: A Novel Multiple--Reference, Multiple--Channel, Normalized Filtered--X LMS Algorithm for Active Control of Propeller-Induced Noise in Aircraft Cabins. Part B2: Evaluation of Multiple--Reference Active Noise Control Algorithms on Dornier 328 Aircraft Data. Part C: A New Active Headset for a Helicopter Application. The test data sets used in the computer evaluations are based on real--life data throughout. The data was recorded in a twin-engine propeller aircraft (Dornier 328) and a Super Puma helicopter during flight.

Abstract [sv]

Licentiatavhandlingen behandlar olika metoder och algorimer för att undertrycka kabinbuller i flygplan härrörande från propellrarna. I och med att flera frekvenskomponenter skall dämpas samt att flera högtalare och mikrofoner behövs för att erhålla bullerundertruckning i en stor volym (kabinen) krävs ett avancerat reglersystem. Delar av det som presenteras i avhandlingen har ingått i ett EU-projekt med inriktning mot bullerundertryckning i propellerflygplan. I projektet har flera europeiska flygplanstillverkare deltagit. De aktiva teknikerna kan också användas i flera olika sammanhang, t.e.x. headset som används av helikopterpiloter. En del i avhandlingen behandlar ett hybrid-headset, där blandade reglerteknik används.

Place, publisher, year, edition, pages
Lund/Ronneby: University of Karlskrona/Ronneby, Lund University , 1998. , 129 p.
Series
Blekinge Tekniska Högskola Forskningsrapport, ISSN 1103-1581
Keyword [en]
active noise control, feedforward control, filtere-x lms algorithm, complex lms, multichannel system, multiple reference, aircraft, headset
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:bth-00075Local ID: oai:bth.se:forskinfo2E2AA0BC2BD5FBC0C12568A3002CAB90ISBN: HKR/R-RES–98/3–SE (print)OAI: oai:DiVA.org:bth-00075DiVA: diva2:838222
Available from: 2012-09-18 Created: 2000-03-15 Last updated: 2015-06-30Bibliographically approved

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Johansson, Sven

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CiteExportLink to record
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