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HALO flight test with instrumented under-wing stores for aeroelastic and load measurements in the DLR project iLOADS

Sinske, Julian and Govers, Yves and Jelicic, Goran and Handojo, Vega and Krüger, Wolf R. and Böswald, Marc (2018) HALO flight test with instrumented under-wing stores for aeroelastic and load measurements in the DLR project iLOADS. CEAS Aeronautical Journal, 9 (1), pp. 207-218. Springer. DOI: 10.1007/s13272-018-0294-3 ISBN 1869-5582 ISSN 1869-5582

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Official URL: https://link.springer.com/article/10.1007%2Fs13272-018-0294-3

Abstract

HALO (High Altitude and Long Range Research Aircraft), the atmospheric research aircraft of the German Aerospace Center (DLR), can be equipped with under-wing stores at different wing positions to transport scientific instruments for atmospheric research. The particle measurement system (PMS) carrier is such an external store which can carry three instruments at the same time per wing. Any modifications on an aircraft must be tested numerically and experimentally to ensure the structural integrity of the aircraft for all flight conditions. Load and flutter analyses can be validated with flight test data. For flight test, the aircraft and the under-wing stores of HALO must be equipped with acceleration and strain sensors. To reduce flight test time it is necessary to make quick decisions during the flight test. Therefore the DLR Institute of Aeroelasticity in Göttingen has developed a real-time analysis procedure for online identification of modal parameters like eigenfrequencies, damping ratios and mode shapes. These parameters vary with flight conditions and are necessary to analyse the aeroelastic stability of the system. The department of loads analysis and aeroelastic design and the department of structural dynamics and system identification have tested the newly developed procedure in 14 flight hours on the HALO. A network of three distributed data acquisition modules enabled the recording of the flight test instrumentation with 51 accelerometers and 16 strain gauge bridges. The measured data were distributed online on several computers where the newly developed software was implemented, allowing an instantaneous analysis of the structural dynamics behaviour and loads in flight. This paper provides an overview of the conducted flight vibration tests with HALO. It also shows the capability of the newly developed online monitoring system for aeroelastic identification.

Item URL in elib:https://elib.dlr.de/123411/
Document Type:Article
Title:HALO flight test with instrumented under-wing stores for aeroelastic and load measurements in the DLR project iLOADS
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Sinske, Julianjulian.sinske (at) dlr.dehttps://orcid.org/0000-0002-6080-9982
Govers, YvesYves.Govers (at) dlr.dehttps://orcid.org/0000-0003-2236-596X
Jelicic, Gorangoran.jelicic (at) dlr.dehttps://orcid.org/0000-0001-5091-6699
Handojo, Vegavega.handojo (at) dlr.dehttps://orcid.org/0000-0001-6030-2383
Krüger, Wolf R.Wolf.Krueger (at) dlr.dehttps://orcid.org/0000-0002-7949-1169
Böswald, Marcmarc.boeswald (at) dlr.dehttps://orcid.org/0000-0001-8260-8623
Date:27 February 2018
Journal or Publication Title:CEAS Aeronautical Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:9
DOI :10.1007/s13272-018-0294-3
Page Range:pp. 207-218
Publisher:Springer
ISSN:1869-5582
ISBN:1869-5582
Status:Published
Keywords:flight vibration test, operational modal analysis, automated online aeroelastic identification
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 - Flight Physics
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Structural Dynamics and System Identification
Deposited By: Sinske, Julian
Deposited On:11 Jan 2019 10:34
Last Modified:06 Sep 2019 15:24

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