Algermissen, Stephan and Misol, Malte and Unruh, Oliver (2012) Reduction of Turbulent Boundary Layer Noise with Actively Controlled Carbon Fiber Reinforced Plastic Panels. In: Adaptive, Tolerant and Efficient Composite Structures Springer. pp. 417-425. ISBN 978 3 642 29189 0.
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The turbulent boundary layer (TBL) is one of the dominant external 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 the transmission loss of CFRP panels they are equipped with active noise reduction 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 a TBL is tested at flow speeds up to Mach 0.16. The CFRP panel (500 x 800 x 2.7 mm^3) is equipped with five piezo-ceramic patch actuators and 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. Feedforward and feedback 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 for global feedback control. Finally, an overview of the achieved results is given.
|Document Type:||Book Section|
|Title:||Reduction of Turbulent Boundary Layer Noise with Actively Controlled Carbon Fiber Reinforced Plastic Panels|
|Journal or Publication Title:||Adaptive, Tolerant and Efficient Composite Structures|
|In ISI Web of Science:||No|
|Page Range:||pp. 417-425|
|ISBN:||978 3 642 29189 0|
|Keywords:||Adaptive system, Turbulent boundary layer, active structural acoustic control, noise reduction|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Transport|
|HGF - Program Themes:||V SH - Verbesserung der Sicherheit im Verkehr (old)|
|DLR - Research area:||Transport|
|DLR - Program:||V SH - Verbesserung der Sicherheit im Verkehr|
|DLR - Research theme (Project):||V - Aktive Vibrations- und Lärmreduzierung an Fahrzeugen (old)|
|Institutes and Institutions:||Institute of Composite Structures and Adaptive Systems|
|Deposited By:||Silke Stanitzek|
|Deposited On:||17 Jul 2012 07:27|
|Last Modified:||01 Aug 2012 07:38|
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