TY  - CHAP
A1  - Bergmann, Ole
A1  - Götten, Falk
A1  - Braun, Carsten
A1  - Janser, Frank
T1  - Comparison and evaluation of blade element methods against RANS simulations and test data
T2  - CEAS Aeronautical Journal
N2  - This paper compares several blade element theory (BET) method-based propeller simulation tools, including an evaluation against static propeller ground tests and high-fidelity Reynolds-Average Navier Stokes (RANS) simulations. Two proprietary propeller geometries for paraglider applications are analysed in static and flight conditions. The RANS simulations are validated with the static test data and used as a reference for comparing the BET in flight conditions. The comparison includes the analysis of varying 2D aerodynamic airfoil parameters and different induced velocity calculation methods. The evaluation of the BET propeller simulation tools shows the strength of the BET tools compared to RANS simulations. The RANS simulations underpredict static experimental data within 10% relative error, while appropriate BET tools overpredict the RANS results by 15–20% relative error. A variation in 2D aerodynamic data depicts the need for highly accurate 2D data for accurate BET results. The nonlinear BET coupled with XFOIL for the 2D aerodynamic data matches best with RANS in static operation and flight conditions. The novel BET tool PropCODE combines both approaches and offers further correction models for highly accurate static and flight condition results.
KW  - BET
KW  - CFD propeller simulation
KW  - Propeller aerodynamics
KW  - Actuator disk modelling
KW  - Propeller performance
Y1  - 2022
U6  - http://dx.doi.org/10.1007/s13272-022-00579-1
SN  - 1869-5590 (Online)
SN  - 1869-5582 (Print)
N1  - Corresponding author: Ole Bergmann
VL  - 13
SP  - 535
EP  - 557
PB  - Springer
CY  - Wien
ER  - 
TY  - CHAP
A1  - Hüning, Felix
A1  - Heuermann, Holger
A1  - Wache, Franz-Josef
T1  - Wireless CAN
T2  - Tagungsband AALE 2018 : das Forum für Fachleute der Automatisierungstechnik aus Hochschulen und Wirtschaft ; 15. Fachkonferenz, Regensburg ; [15. Konferenz für Angewandte Automatisierungstechnik in Lehre und Entwicklung / TH Köln; VFAALE, Verein der Freunde und Förderer der Angewandten Automatisierungstechnik]
N2  - Das vorgestellte System zu Wireless CAN bietet die Möglichkeit, CAN kabellos zu übertragen. Beide vorgestellten und entwickelten Konzepte funktionieren korrekt und ermöglichen den Auf-bau von kabellosen CAN Schnittstellen. Durch den kleinen Aufbau kann diese Technologie auch für eingebettete Systeme verwendet werden. Zudem bietet dieser Ansatz die Möglichkeit, durch die Entwicklung von geeigneten ICs die Größe des Systems bis auf Bauteilgröße zu reduzieren, um eine noch bessere Integration in eingebettete Systeme zu ermöglichen. Dadurch wird die Technologie attraktiv für Einsatzgebiete, wo die oben aufgelisteten Vorteile zum Tragen kommen können. Diese Einsatzgebiete können sowohl im Automobil als auch im Industriebereich liegen.
Y1  - 2018
SP  - 135
EP  - 144
PB  - VDE Verlag
ER  - 
TY  - CHAP
A1  - Jung, Alexander
A1  - Frotscher, Ralf
A1  - Staat, Manfred
T1  - Electromechanical model of hiPSC-derived ventricular cardiomyocytes cocultured with fibroblasts
T2  - 6th European Conference on Computational Mechanics (ECCM 6), 7th European Conference on Computational Fluid Dynamics (ECFD 7), 11-15 June 2018, Glasgow, UK
N2  - The CellDrum provides an experimental setup to study the mechanical effects of fibroblasts co-cultured with hiPSC-derived ventricular cardiomyocytes. Multi-scale computational models based on the Finite Element Method are developed. Coupled electrical cardiomyocyte-fibroblast models (cell level) are embedded into reaction-diffusion equations (tissue level) which compute the propagation of the action potential in the cardiac tissue. Electromechanical coupling is realised by an excitation-contraction model (cell level) and the active stress arising during contraction is added to the passive stress in the force balance, which determines the tissue displacement (tissue level). Tissue parameters in the model can be identified experimentally to the specific sample.
Y1  - 2018
ER  - 
TY  - CHAP
A1  - Baader, Fabian
A1  - Reiswich, M.
A1  - Bartsch, M.
A1  - Keller, D.
A1  - Tiede, E.
A1  - Keck, G.
A1  - Demircian, A.
A1  - Friedrich, M.
A1  - Dachwald, Bernd
A1  - Schüller, K.
A1  - Lehmann, R.
A1  - Chojetzki, R.
A1  - Durand, C.
A1  - Rapp, L.
A1  - Kowalski, Julia
A1  - Förstner, R.
T1  - VIPER - Student research on extraterrestrical ice penetration technology
T2  - Proceedings of the 2nd Symposium on Space Educational Activities
N2  - Recent analysis of scientific data from Cassini and earth-based observations gave evidence for a global ocean under a surrounding solid ice shell on Saturn's moon Enceladus. Images of Enceladus' South Pole showed several fissures in the ice shell with plumes constantly exhausting frozen water particles, building up the E-Ring, one of the outer rings of Saturn. In this southern region of Enceladus, the ice shell is considered to be as thin as 2 km, about an order of magnitude thinner than on the rest of the moon. Under the ice shell, there is a global ocean consisting of liquid water. Scientists are discussing different approaches the possibilities of taking samples of water, i.e. by melting through the ice using a melting probe. FH Aachen UAS developed a prototype of maneuverable melting probe which can navigate through the ice that has already been tested successfully in a terrestrial environment. This means no atmosphere and or ambient pressure, low ice temperatures of around 100 to 150K (near the South Pole) and a very low gravity of 0,114 m/s^2 or 1100 μg. Two of these influencing measures are about to be investigated at FH Aachen UAS in 2017, low ice temperature and low ambient pressure below the triple point of water. Low gravity cannot be easily simulated inside a large experiment chamber, though. Numerical simulations of the melting process at RWTH Aachen however are showing a gravity dependence of melting behavior. Considering this aspect, VIPER provides a link between large-scale experimental simulations at FH Aachen UAS and numerical simulations at RWTH Aachen. To analyze the melting process, about 90 seconds of experiment time in reduced gravity and low ambient pressure is provided by the REXUS rocket. In this time frame, the melting speed and contact force between ice and probes are measured, as well as heating power and a two-dimensional array of ice temperatures. Additionally, visual and infrared cameras are used to observe the melting process.
Y1  - 2018
SP  - 1
EP  - 6
ER  - 
TY  - CHAP
A1  - Schreiber, Marc
A1  - Kraft, Bodo
A1  - Zündorf, Albert
T1  - Metrics Driven Research Collaboration: Focusing on Common Project Goals Continuously
T2  - 39th International Conference on Software Engineering, May 20-28, 2017 - Buenos Aires, Argentina
N2  - Research collaborations provide opportunities for both practitioners and researchers: practitioners need solutions for difficult business challenges and researchers are looking for hard problems to solve and publish. Nevertheless, research collaborations carry the risk that practitioners focus on quick solutions too much and that researchers tackle theoretical problems, resulting in products which do not fulfill the project requirements.
In this paper we introduce an approach extending the ideas of agile and lean software development. It helps practitioners and researchers keep track of their common research collaboration goal: a scientifically enriched software product which fulfills the needs of the practitioner’s business model.
This approach gives first-class status to application-oriented metrics that measure progress and success of a research collaboration continuously. Those metrics are derived from the collaboration requirements and help to focus on a commonly defined goal.
An appropriate tool set evaluates and visualizes those metrics with minimal effort, and all participants will be pushed to focus on their tasks with appropriate effort. Thus project status, challenges and progress are transparent to all research collaboration members at any time.
Y1  - 2017
N1  - Software Engineering in Practice (SEIP).
ICSE2017
Vorabversion der Autoren
ER  - 
TY  - CHAP
A1  - Dalguer, Luis A.
A1  - Renault, Philippe
A1  - Churilov, Sergey
A1  - Butenweg, Christoph
T1  - Evaluation of fragility curves for a three-storey-reinforced-concrete mock-up of SMART 2013 project
T2  - Transactions, SMiRT-23 : 23rd Conference on Structural Mechanics in Reactor Technology : Manchester, United Kingdom - August 10-14, 2015
Y1  - 2016
SP  - 1
EP  - 9
ER  - 
TY  - CHAP
A1  - Wollert, Jörg
T1  - Industrie 4.0 - warten bis die Revolution vorbei ist?
T2  - Automatisierung im Fokus von Industrie 4.0 : Tagungsband AALE 2016 ; 13. Fachkonferenz, Lübeck
Y1  - 2016
SN  - 978-3-8356-7312-0
N1  - AALE-Konferenz <13., 2016, Lübeck>
SP  - 127
EP  - 136
PB  - DIV Deutscher Industrieverlag GmbH
CY  - München
ER  - 
TY  - CHAP
A1  - Kallweit, Stephan
A1  - Schleupen, Josef
A1  - Dahmann, Peter
A1  - Bagheri, Mohsen
A1  - Engemann, Heiko
T1  - Entwicklung eines Kletterroboters zur Diagnose und Instandsetzung von Windenergieanlagen (SMART)
T2  - Automatisierung im Fokus von Industrie 4.0 : Tagungsband AALE 2016 ; 13. Fachkonferenz, Lübeck
Y1  - 2016
SN  - 978-3-8356-7312-0
N1  - AALE-Konferenz <13., 2016, Lübeck>
SP  - 207
EP  - 212
PB  - DIV Deutscher Industrieverlag GmbH
CY  - München
ER  - 
TY  - CHAP
A1  - Becker, Sebastian
A1  - Höfken, Hans-Wilhelm
A1  - Schütz, Philip
A1  - Schuba, Marko
ED  - Schartner, P.
T1  - IT-forensische Erkennung modifizierter Android-Apps
T2  - Proceedings of DACH Security 2016, Klagenfurt, Austria, September 2016
N2  - Malware auf Smartphones ist ein Problem, dem auch Strafverfolgungsbehörden immer häufiger gegenüberstehen.
Insbesondere Telefone, bei denen potentiell schadhafte Apps zu einem finanziellen Schaden
geführt haben, finden sich auf den Schreibtischen der Polizei wieder. Dabei müssen die Ermittler möglichst
schnell und gezielt erkennen können, ob eine App tatsächlich schadhaft manipuliert wurde, was
manipuliert wurde und mit wem die App kommuniziert. Klassische Malware-Erkennungsverfahren helfen
zwar bei der generellen Erkennung schadhafter Software, sind aber für die polizeiliche Praxis nicht
geeignet. Dieses Paper stellt ein Programm vor, welches gerade die forensischen Fragestellungen berücksichtigt
und so für den Einsatz in der Strafverfolgung in Frage kommt.
Y1  - 2016
SP  - 120
EP  - 125
ER  - 
TY  - CHAP
A1  - Bonney, Gregor
A1  - Nagel, Stefan
A1  - Schuba, Marko
ED  - Schartner, P.
T1  - Risiko Smart Home – Angriff auf ein Babymonitorsystem
T2  - Proceedings of DACH Security 2016, Klagenfurt, Austria, September 2016
N2  - Unser Zuhause wird zunehmend intelligenter. Smart Homes bieten uns die Steuerung von Haus- oder Unterhaltungstechnik bequem vom Smartphone aus. Junge Familien nutzen die Technologie, um mittels vernetzten Babymonitorsystemen ihren Nachwuchs von überall aus im Blick zu haben. Davon auszugehen, dass solche Systeme mit einem Fokus auf Sicherheit entwickelt wurden, um die sehr persönlichen Daten zu schützen, ist jedoch ein Trugschluss. Die Untersuchung eines handelsüblichen und keineswegs billigen Systems zeigt, dass die Geräte sehr einfach kompromittiert und missbraucht werden können.
Y1  - 2016
SP  - 371
EP  - 378
ER  -