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Efficient Azimuthal Mode Analysis using Compressed Sensing

Behn, Maximilian and Kisler, Roman and Tapken, Ulf (2016) Efficient Azimuthal Mode Analysis using Compressed Sensing. In: AIAA JOURNAL, AIAA 2016-3038. 22nd AIAA/CEAS Aeroacoustics Conference, 30. Mai - 1. Juni 2016, Lyon, Frankreich. DOI: http://arc.aiaa.org/doi/abs/10.2514/6.2016-3038

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Official URL: http://arc.aiaa.org/doi/abs/10.2514/6.2016-3038

Abstract

A new approach for the Azimuthal Mode Analysis (AMA) of over- and subsampled sound fields in flow ducts of turbomachines using circumferential sensor arrays is presented which is based on Compressed Sensing. Compressed Sensing is a framework to solve underdetermined systems of linear equations under the assumption that the solution vector is sparse. In the context of AMA, such sparse mode spectra often occur in the analysis of tonal sound field components generated by rotor-stator interaction. Important features such as stability and accuracy are investigated by analysis of a wide range of simulated and measured pressure data and comparison with commonly applied methods. Also two different optimisation approaches for the design of circumferential sensor arrays are introduced which allows a reduction of the number of sensors for large modal ranges if only a limited number of modes are dominant. Furthermore, the remaining mode amplitudes are estimated exploiting the deconvolution property of the applied Compressed Sensing algorithm.

Item URL in elib:https://elib.dlr.de/109509/
Document Type:Conference or Workshop Item (Speech)
Title:Efficient Azimuthal Mode Analysis using Compressed Sensing
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Behn, Maximilianmaximilian.behn (at) dlr.deUNSPECIFIED
Kisler, RomanTechnische Universität BerlinUNSPECIFIED
Tapken, Ulfulf.tapken (at) dlr.deUNSPECIFIED
Date:June 2016
Journal or Publication Title:AIAA JOURNAL
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
DOI :http://arc.aiaa.org/doi/abs/10.2514/6.2016-3038
Page Range:AIAA 2016-3038
Status:Published
Keywords:Engine Acoustics, Mode Analysis, AMA, Microphone Arrays, Turbomachinery, Interaction modes, Compressed Sensing, Subsampling, sparse signal reconstruction, Array design
Event Title:22nd AIAA/CEAS Aeroacoustics Conference
Event Location:Lyon, Frankreich
Event Type:international Conference
Event Dates:30. Mai - 1. Juni 2016
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Fan and Compressor Technologies, L - Turbine Technologies
Location: Berlin-Charlottenburg
Institutes and Institutions:Institute of Propulsion Technology > Engine Acoustic
Deposited By: Behn, Maximilian
Deposited On:04 Jan 2017 11:43
Last Modified:07 Feb 2018 16:22

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