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Structural integrated sensor and actuator systems for active flow control

Behr, Christian and Schwerter, Martin and Leester-Schädel, Monika and Wierach, Peter and Dietzel, Andreas and Sinapius, Michael (2016) Structural integrated sensor and actuator systems for active flow control. SPIE Smart Structures/NDE, 21.-24. März 2016, Las Vegas, USA. DOI: 10.1117/12.2219075

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Abstract

An adaptive flow separation control system is designed and implemented as an essential part of a novel high-lift device for future aircraft. The system consists of MEMS pressure sensors to determine the flow conditions and adaptive lips to regulate the mass flow and the velocity of a wall near stream over the internally blown Coanda flap. By the oscillating lip the mass flow in the blowing slot changes dynamically, consequently the momentum exchange of the boundary layer over a high lift flap required mass flow can be reduced. These new compact and highly integrated systems provide a realtime monitoring and manipulation of the flow conditions. In this context the integration of pressure sensors into flow sensing airfoils of composite material is investigated. Mechanical and electrical properties of the integrated sensors are investigated under mechanical loads during tensile tests. The sensors contain a reference pressure chamber isolated to the ambient by a deformable membrane with integrated piezoresistors connected as a Wheatstone bridge, which outputs voltage signals depending on the ambient pressure. The composite material in which the sensors are embedded consists of 22 individual layers of unidirectional glass fiber reinforced plastic (GFRP) prepreg. The results of the experiments are used for adapting the design of the sensors and the layout of the laminate to ensure an optimized flux of force in highly loaded structures primarily for future aeronautical applications. It can be shown that the pressure sensor withstands the embedding process into fiber composites with full functional capability and predictable behavior under stress.

Item URL in elib:https://elib.dlr.de/106956/
Document Type:Conference or Workshop Item (Speech)
Title:Structural integrated sensor and actuator systems for active flow control
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Behr, Christianc.behr (at) dlr.deUNSPECIFIED
Schwerter, Martinm.schwerter (at) tu-braunschweig.deUNSPECIFIED
Leester-Schädel, Monikam.leester (at) tu-braunschweig.deUNSPECIFIED
Wierach, PeterPeter.Wierach (at) dlr.deUNSPECIFIED
Dietzel, Andreasa.dietzel (at) tu-braunschweig.deUNSPECIFIED
Sinapius, Michaelm.sinapius (at) tu-braunschweig.deUNSPECIFIED
Date:2016
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.1117/12.2219075
Series Name:Proc. SPIE 9803, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2016, 980337 (April 20, 2016); doi:10.1117/12.2219075
Status:Published
Keywords:adaptive structures, smart materials, piezoelectric actuators, flow control
Event Title:SPIE Smart Structures/NDE
Event Location:Las Vegas, USA
Event Type:international Conference
Event Dates:21.-24. März 2016
Organizer:SPIE
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures and Materials
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Multifunctional Materials
Deposited By: Behr, Christian
Deposited On:31 Oct 2016 08:31
Last Modified:31 Oct 2016 08:31

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