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Robust Control of Turbulent Boundary Layer Noise Transmission Through a Stiffened Panel

Algermissen, Stephan and Misol, Malte and Unruh, Oliver and Heintze, Olaf and Monner, Hans Peter (2010) Robust Control of Turbulent Boundary Layer Noise Transmission Through a Stiffened Panel. International Congress on Sound and Vibration (ICSV), 18. - 22. Juli 2010, Kairo, Ägypten.

Full text not available from this repository.

Abstract

Turbulent boundary layer (TBL) induced noise is one of the dominant noise sources in high subsonic aircrafts. Especially in modern aircrafts where common materials for fuselages are currently substituted by carbon-fiber-reinforced-plastics (CFRP), it is essential to avoid a decrease of passenger comfort as a result of an inferior transmission loss of the new materials. To increase transmission loss of CFRP panels they are equipped with active systems. In this paper the results of an experimental study in the aeroacoustic wind tunnel of the German Aerospace Center (DLR) are presented. An active panel excited by TBL is tested at flow speeds up to Mach 0.16. The CFRP panel (500 x 800 mm^2) is stiffened with four stringers and equipped with five piezo-ceramic patch actuators and up to ten accelerometers. Active structural acoustic control (ASAC) and active vibration control (AVC) are used to reduce the broadband TBL noise transmission in the bandwidth from 1 to 500 Hz. Robust H∞ control algorithms are applied in the experiments and show high performance even in presence of plant uncertainties. To improve control results the generalized plant framework of robust control is utilized. By inclusion of additional performance outputs in form of laser scanning vibrometer (LSV) measurements it is possible to gain global vibration reduction and an enhanced radiation mode control. Algorithms for the identification of the generalized plant are additionally presented. Finally, an overview of the achieved results is given.

Item URL in elib:https://elib.dlr.de/83465/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Robust Control of Turbulent Boundary Layer Noise Transmission Through a Stiffened Panel
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Algermissen, StephanUNSPECIFIEDUNSPECIFIED
Misol, MalteUNSPECIFIEDUNSPECIFIED
Unruh, OliverUNSPECIFIEDUNSPECIFIED
Heintze, OlafUNSPECIFIEDUNSPECIFIED
Monner, Hans PeterUNSPECIFIEDUNSPECIFIED
Date:July 2010
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:robust control; turbulent boundary layer noise; noise control
Event Title:International Congress on Sound and Vibration (ICSV)
Event Location:Kairo, Ägypten
Event Type:international Conference
Event Dates:18. - 22. Juli 2010
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Adaptronics
Deposited By: Böhringer-Thelen, Isolde
Deposited On:25 Jul 2013 12:46
Last Modified:25 Jul 2013 12:46

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