TY  - JOUR
A1  - Götten, Falk
A1  - Havermann, Marc
A1  - Braun, Carsten
A1  - Marino, Matthew
A1  - Bil, Cees
T1  - Wind-tunnel and CFD investigations of UAV landing gears and turrets – Improvements in empirical drag estimation
JF  - Aerospace Science and Technology
N2  - This paper analyzes the drag characteristics of several landing gear and turret configurations that are representative of unmanned aircraft tricycle landing gears and sensor turrets. A variety of these components were constructed via 3D-printing and analyzed in a wind-tunnel measurement campaign. Both turrets and landing gears were attached to a modular fuselage that supported both isolated components and multiple components at a time. Selected cases were numerically investigated with a Reynolds-averaged Navier-Stokes approach that showed good accuracy when compared to wind-tunnel data. The drag of main gear struts could be significantly reduced via streamlining their cross-sectional shape and keeping load carrying capabilities similar. The attachment of wheels introduced interference effects that increased strut drag moderately but significantly increased wheel drag compared to isolated cases. Very similar behavior was identified for front landing gears. The drag of an electro-optical and infrared sensor turret was found to be much higher than compared to available data of a clean hemisphere-cylinder combination. This turret drag was merely influenced by geometrical features like sensor surfaces and the rotational mechanism. The new data of this study is used to develop simple drag estimation recommendations for main and front landing gear struts and wheels as well as sensor turrets. These recommendations take geometrical considerations and interference effects into account.
Y1  - 2020
U6  - https://doi.org/10.1016/j.ast.2020.106306
SN  - 1270-9638
VL  - 107
IS  - Art. 106306
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Wolf, Martin R.
T1  - Groupware related task design
JF  - ACM SIGGROUP Bulletin. 21 (2000), H. 2
Y1  - 2000
SP  - 5
EP  - 8
PB  - -
ER  - 
TY  - JOUR
A1  - Ferrein, Alexander
T1  - golog.lua: Towards a Non-Prolog Implementation of Golog for Embedded Systems
Y1  - 2010
SP  - 20
EP  - 28
ER  - 
TY  - JOUR
A1  - Ferrein, Alexander
T1  - golog.lua: Towards a Non-Prolog Implementation of Golog for Embedded Systems
JF  - Cognitive Robotics / Lakemeyer, Gerhard (ed.)
Y1  - 2010
N1  - Dagstuhl Seminar Proceedings ; 10081
SP  - 1
EP  - 15
ER  - 
TY  - JOUR
A1  - Wolf, Martin R.
T1  - Risiko- und Maßnahmenmanagement bei der Computervalidierung
JF  - Pharma-Technologie-Journal (2003)
Y1  - 2003
SN  - 0931-9700
SP  - 50
EP  - 62
PB  - -
ER  - 
TY  - JOUR
A1  - Hein, Andreas M.
A1  - Eubanks, T. Marshall
A1  - Lingam, Manasvi
A1  - Hibberd, Adam
A1  - Fries, Dan
A1  - Schneider, Jean
A1  - Kervella, Pierre
A1  - Kennedy, Robert
A1  - Perakis, Nikolaos
A1  - Dachwald, Bernd
T1  - Interstellar now! Missions to explore nearby interstellar objects
JF  - Advances in Space Research
N2  - The recently discovered first hyperbolic objects passing through the Solar System, 1I/’Oumuamua and 2I/Borisov, have raised the question about near term missions to Interstellar Objects. In situ spacecraft exploration of these objects will allow the direct determination of both their structure and their chemical and isotopic composition, enabling an entirely new way of studying small bodies from outside our solar system. In this paper, we map various Interstellar Object classes to mission types, demonstrating that missions to a range of Interstellar Object classes are feasible, using existing or near-term technology. We describe flyby, rendezvous and sample return missions to interstellar objects, showing various ways to explore these bodies characterizing their surface, dynamics, structure and composition. Their direct exploration will constrain their formation and history, situating them within the dynamical and chemical evolution of the Galaxy. These mission types also provide the opportunity to explore solar system bodies and perform measurements in the far outer solar system.
KW  - Interstellar objects
KW  - Trajectories
KW  - Missions
Y1  - 2022
U6  - https://doi.org/10.1016/j.asr.2021.06.052
SN  - 0273-1177
VL  - 69
IS  - 1
SP  - 402
EP  - 414
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Dachwald, Bernd
A1  - Ball, Andrew J.
A1  - Ulamec, Stephan
A1  - Price, Michael E.
T1  - A small mission for in situ exploration of a primitive binary near-Earth asteroid  / Ball, Andrew J. ; Ulamec, Stephan ; Dachwald, Bernd ; Price, Michael E. ; [u.a.]
JF  - Advances in Space Research. 43 (2009), H. 2
Y1  - 2009
SN  - 0273-1177
SP  - 317
EP  - 324
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Alexopoulos, Spiros
A1  - Hoffschmidt, Bernhard
T1  - Solarthermische Kraftwerke mit thermischen Speichern
JF  - Chemie Ingenieur Technik. 82 (2010), H. 9
Y1  - 2010
SN  - 1522-2640
N1  - Special Issue: ProcessNet-Jahrestagung 2010 und 28. Jahrestagung der Biotechnologen V9.01 [Abstract des Vortrags]
SP  - 1606
EP  - 1606
ER  - 
TY  - JOUR
A1  - Holtschoppen, B.
A1  - Butenweg, Christoph
A1  - Meskouris, Konstantin
T1  - Erdbebensichere Auslegung von Industrieanlagen
JF  - Der Bauingenieur : die richtungsweisende Zeitschrift im Bauingenieurswesen ; offizielle Zeitschrift der VDI-Gesellschaft Bautechnik
Y1  - 2009
SN  - 0005-6650
IS  - März
SP  - S9
EP  - S14
PB  - VDI Fachmedien
CY  - Düsseldorf
ER  - 
TY  - JOUR
A1  - Akimbekov, Nuraly S.
A1  - Digel, Ilya
A1  - Zhubanova, A. A.
T1  - Investigation the Influence of Carbonized Material Based On Rice Husk on Viability and Migration of Fibroblasts in T3B3 Cell Culture
JF  - KazNU Bulletin. Biology series
Y1  - 2013
SN  - 1563-0218
N1  - Original in russischer Sprache
VL  - 59
IS  - 3/1
SP  - 20
EP  - 23
ER  -