TY - CHAP A1 - Blome, Hans-Joachim A1 - Gerzer, Rupert A1 - Baumstark-Khan, Christa A1 - Ewald, Reinhold A1 - Heinicke, Christiane A1 - Czupalla, Markus A1 - Carter, Layne A1 - Anderson, Molly T1 - Überleben im Weltraum. Auf dem Weg zu neuen Grenzen. 21. Berliner Kolloquium der Daimler und Benz Stiftung 24. Mai 2017 Y1 - 2017 ER - TY - JOUR A1 - Finger, Felix T1 - Vergleichende Leistungs- und Nutzenbewertung von VTOL- und CTOL-UAVs JF - Luft- und Raumfahrt : informieren, vernetzen, fördern / Hrsg.: Deutsche Gesellschaft für Luft- und Raumfahrt Y1 - 2017 SN - 0173-6264 VL - 38 IS - 1 SP - 44 EP - 47 ER - TY - JOUR A1 - Weber, Tobias A1 - Arent, Jan-Christoph A1 - Steffen, Lucas A1 - Balvers, Johannes M. A1 - Duhovic, Miro T1 - Thermal optimization of composite autoclave molds using the shift factor approach for boundary condition estimation JF - Journal of Composite Materials Y1 - 2017 U6 - http://dx.doi.org/10.1177/0021998317699868 SN - 1530-793X VL - 51 IS - 12 SP - 1753 EP - 1767 PB - Sage CY - London ER - TY - CHAP A1 - Finger, Felix A1 - Braun, Carsten A1 - Bil, Cees T1 - The Impact of Electric Propulsion on the Performance of VTOL UAVs T2 - Deutscher Luft- und Raumfahrtkongress 2017, DLRK , München Y1 - 2017 ER - TY - CHAP A1 - Grundmann, Jan Thimo A1 - Boden, Ralf A1 - Ceriotti, Matteo A1 - Dachwald, Bernd A1 - Dumont, Etienne A1 - Grimm, Christian D. A1 - Lange, Caroline A1 - Lichtenheldt, Roy A1 - Pelivan, Ivanka A1 - Peloni, Alessandro A1 - Riemann, Johannes A1 - Spröwitz, Tom A1 - Tardivel, Simon T1 - Soil to sail-asteroid landers on near-term sailcraft as an evolution of the GOSSAMER small spacecraft solar sail concept for in-situ characterization T2 - 5th IAA Planetary Defense Conference KW - multiple NEA rendezvous KW - solar sail KW - GOSSAMER-1 KW - MASCOT KW - asteroid sample return Y1 - 2017 N1 - 5th IAA Planetary Defense Conference – PDC 2017 15-19 May 2017, Tokyo, Japan ER - TY - CHAP A1 - Grundmann, Jan Thimo A1 - Meß, Jan-Gerd A1 - Biele, Jens A1 - Seefeldt, Patric A1 - Dachwald, Bernd A1 - Spietz, Peter A1 - Grimm, Christian D. A1 - Spröwitz, Tom A1 - Lange, Caroline A1 - Ulamec, Stephan T1 - Small spacecraft in small solar system body applications T2 - IEEE Aerospace Conference 2017, Big Sky, Montana, USA Y1 - 2017 SN - 978-1-5090-1613-6 U6 - http://dx.doi.org/10.1109/AERO.2017.7943626 SP - 1 EP - 20 ER - TY - CHAP A1 - Grundmann, Jan Thimo A1 - Biele, Jens A1 - Dachwald, Bernd A1 - Grimm, Christian D. A1 - Lange, Caroline A1 - Ulamec, Stephan A1 - Ziach, Christian A1 - Spröwitz, Tom A1 - Ruffer, Michael A1 - Seefeldt, Patric A1 - Spietz, Peter A1 - Toth, Norbert A1 - Mimasu, Yuya A1 - Rittweger, Andreas A1 - Bibring, Jean-Pierre A1 - Braukhane, Andy A1 - Boden, Ralf Christian A1 - Dumont, Etienne A1 - Jahnke, Stephan Siegfried A1 - Jetzschmann, Michael A1 - Krüger, Hans A1 - Lange, Michael A1 - Gomez, Antonio Martelo A1 - Massonett, Didier A1 - Okada, Tatsuaki A1 - Sagliano, Marco A1 - Sasaki, Kaname A1 - Schröder, Silvio A1 - Sippel, Martin A1 - Skoczylas, Thomas A1 - Wejmo, Elisabet T1 - Small landers and separable sub-spacecraft for near-term solar sails T2 - The Fourth International Symposium on Solar Sailing 2017 N2 - Following the successful PHILAE landing with ESA's ROSETTA probe and the launch of the MINERVA rovers and the Mobile Asteroid Surface Scout, MASCOT, aboard the JAXA space probe, HAYABUSA2, to asteroid (162173) Ryugu, small landers have found increasing interest. Integrated at the instrument level in their mothership they support small solar system body studies. With efficient capabilities, resource-friendly design and inherent robustness they are an attractive exploration mission element. We discuss advantages and constraints of small sub-spacecraft, focusing on emerging areas of activity such as asteroid diversity studies, planetary defence, and asteroid mining, on the background of our projects PHILAE, MASCOT, MASCOT2, the JAXA-DLR Solar Power Sail Lander Design Study, and others. The GOSSAMER-1 solar sail deployment concept also involves independent separable sub-spacecraft operating synchronized to deploy the sail. Small spacecraft require big changes in the way we do things and occasionally a little more effort than would be anticipated based on a traditional large spacecraft approach. In a Constraints-Driven Engineering environment we apply Concurrent Design and Engineering (CD/CE), Concurrent Assembly, Integration and Verification (CAIV) and Model-Based Systems Engineering (MBSE). Near-term solar sails will likely be small spacecraft which we expect to harmonize well with nano-scale separable instrument payload packages. KW - Small Solar System Body Lander KW - Small Spacecraft KW - PHILAE KW - MASCOT KW - Solar Power Sail Y1 - 2017 N1 - The Fourth International Symposium on Solar Sailing 2017, 17-20 January 2017. Kyoto Research Park, Kyoto, Japan SP - 1 EP - 10 ER - TY - CHAP A1 - Kreyer, Jörg A1 - Esch, Thomas T1 - Simulation Tool for Predictive Control Strategies for an ORCSystem in Heavy Duty Vehicles T2 - European GT Conference 2017 N2 - Scientific questions - How can a non-stationary heat offering in the commercial vehicle be used to reduce fuel consumption? - Which potentials offer route and environmental information among with predicted speed and load trajectories to increase the efficiency of a ORC-System? Methods - Desktop bound holistic simulation model for a heavy duty truck incl. an ORC System - Prediction of massflows, temperatures and mixture quality (AFR) of exhaust gas Y1 - 2017 N1 - European GT Conference 2017, 9.-10. Oktober 2017, Frankfurt a.M. ER - TY - CHAP A1 - Dachwald, Bernd T1 - Radiation pressure force model for an ideal laser-enhanced solar sail T2 - 4th International Symposium on Solar Sailing N2 - The concept of a laser-enhanced solar sail is introduced and the radiation pressure force model for an ideal laser-enhanced solar sail is derived. A laser-enhanced solar sail is a “traditional” solar sail that is, however, not solely propelled by solar radiation, but additionally by a laser beam that illuminates the sail. The additional laser radiation pressure increases the sail's propulsive force and can give, depending on the location of the laser source, more control authority over the direction of the solar sail’s propulsive force vector. This way, laser-enhanced solar sails may augment already existing solar sail mission concepts and make novel mission concepts feasible. Y1 - 2017 N1 - 4th International Symposium on Solar Sailing 17-20 January 2017, Kyōto, Japan SP - 1 EP - 5 ER - TY - CHAP A1 - Czupalla, Markus T1 - Pflanzen oder Maschinen - was läßt uns auf dem Mars überleben? T2 - Überleben im Weltraum. Auf dem Weg zu neuen Grenzen. 21. Berliner Kolloquium der Daimler und Benz Stiftung 24. Mai 2017 Y1 - 2017 SP - 12 EP - 12 ER - TY - CHAP A1 - Striegan, C. A1 - Haj Ayed, A. A1 - Funke, Harald A1 - Loechle, S. A1 - Kazari, M. A1 - Horikawa, A. A1 - Okada, K. A1 - Koga, K. T1 - Numerical combustion and heat transfer simulations and validation for a hydrogen fueled "micromix" test combustor in industrial gas turbine applications T2 - Proceedings of the ASME Turbo Expo Y1 - 2017 SN - 978-079185085-5 U6 - http://dx.doi.org/10.1115/GT2017-64719 N1 - ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition, GT 2017; Charlotte; United States; 26 June 2017 through 30 June 2017 IS - Volume Part F130041-4B, 2017 ER - TY - CHAP A1 - Funke, Harald A1 - Beckmann, Nils A1 - Keinz, Jan A1 - Abanteriba, Sylvester T1 - Numerical and Experimental Evaluation of a Dual-Fuel Dry-Low-NOx Micromix Combustor for Industrial Gas Turbine Applications T2 - Proceedings of the ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. Volume 4B: Combustion, Fuels and Emissions. Charlotte, North Carolina, USA. June 26–30, 2017 N2 - The Dry-Low-NOx (DLN) Micromix combustion technology has been developed originally as a low emission alternative for industrial gas turbine combustors fueled with hydrogen. Currently the ongoing research process targets flexible fuel operation with hydrogen and syngas fuel. The non-premixed combustion process features jet-in-crossflow-mixing of fuel and oxidizer and combustion through multiple miniaturized flames. The miniaturization of the flames leads to a significant reduction of NOx emissions due to the very short residence time of reactants in the flame. The paper presents the results of a numerical and experimental combustor test campaign. It is conducted as part of an integration study for a dual-fuel (H2 and H2/CO 90/10 Vol.%) Micromix combustion chamber prototype for application under full scale, pressurized gas turbine conditions in the auxiliary power unit Honeywell Garrett GTCP 36-300. In the presented experimental studies, the integration-optimized dual-fuel Micromix combustor geometry is tested at atmospheric pressure over a range of gas turbine operating conditions with hydrogen and syngas fuel. The experimental investigations are supported by numerical combustion and flow simulations. For validation, the results of experimental exhaust gas analyses are applied. Despite the significantly differing fuel characteristics between pure hydrogen and hydrogen-rich syngas the evaluated dual-fuel Micromix prototype shows a significant low NOx performance and high combustion efficiency. The combustor features an increased energy density that benefits manufacturing complexity and costs. Y1 - 2017 SN - 978-0-7918-5085-5 U6 - http://dx.doi.org/10.1115/GT2017-64795 N1 - Paper No. GT2017-64795, V04BT04A045 PB - ASME CY - New York ER - TY - JOUR A1 - Peloni, Alessandro A1 - Dachwald, Bernd A1 - Ceriotti, Matteo T1 - Multiple near-earth asteroid rendezvous mission: Solar-sailing options JF - Advances in Space Research Y1 - 2017 U6 - http://dx.doi.org/10.1016/j.asr.2017.10.017 SN - 0273-1177 IS - In Press, Corrected Proof PB - Elsevier CY - Amsterdam ER - TY - CHAP A1 - Peloni, Alessandro A1 - Dachwald, Bernd A1 - Ceriotti, Matteo T1 - Multiple NEA rendezvous mission: Solar sailing options T2 - Fourth International Symposium on Solar Sailing N2 - The scientific interest in near-Earth asteroids (NEAs) and the classification of some of those as potentially hazardous asteroid for the Earth stipulated the interest in NEA exploration. Close-up observations of these objects will increase drastically our knowledge about the overall NEA population. For this reason, a multiple NEA rendezvous mission through solar sailing is investigated, taking advantage of the propellantless nature of this groundbreaking propulsion technology. Considering a spacecraft based on the DLR/ESA Gossamer technology, this work focuses on the search of possible sequences of NEA encounters. The effectiveness of this approach is demonstrated through a number of fully-optimized trajectories. The results show that it is possible to visit five NEAs within 10 years with near-term solar-sail technology. Moreover, a study on a reduced NEA database demonstrates the reliability of the approach used, showing that 58% of the sequences found with an approximated trajectory model can be converted into real solar-sail trajectories. Lastly, this second study shows the effectiveness of the proposed automatic optimization algorithm, which is able to find solutions for a large number of mission scenarios without any input required from the user. KW - Multiphase KW - Trajectory Optimization KW - Automated Optimization KW - Gossamer KW - Sequence-Search Y1 - 2017 N1 - Fourth International Symposium on Solar Sailing (ISSS 2017), Kyoto, Japan, 17-20 Jan 2017. http://www.jsforum.or.jp/ISSS2017/ SP - 1 EP - 11 ER - TY - CHAP A1 - Carzana, Livio A1 - Dachwald, Bernd A1 - Noomen, Ron T1 - Model and trajectory optimization for an ideal laser-enhanced solar sail T2 - 68th International Astronautical Congress N2 - A laser-enhanced solar sail is a solar sail that is not solely propelled by solar radiation but additionally by a laser beam that illuminates the sail. This way, the propulsive acceleration of the sail results from the combined action of the solar and the laser radiation pressure onto the sail. The potential source of the laser beam is a laser satellite that coverts solar power (in the inner solar system) or nuclear power (in the outer solar system) into laser power. Such a laser satellite (or many of them) can orbit anywhere in the solar system and its optimal orbit (or their optimal orbits) for a given mission is a subject for future research. This contribution provides the model for an ideal laser-enhanced solar sail and investigates how a laser can enhance the thrusting capability of such a sail. The term ”ideal” means that the solar sail is assumed to be perfectly reflecting and that the laser beam is assumed to have a constant areal power density over the whole sail area. Since a laser beam has a limited divergence, it can provide radiation pressure at much larger solar distances and increase the radiation pressure force into the desired direction. Therefore, laser-enhanced solar sails may make missions feasible, that would otherwise have prohibitively long flight times, e.g. rendezvous missions in the outer solar system. This contribution will also analyze exemplary mission scenarios and present optimial trajectories without laying too much emphasis on the design and operations of the laser satellites. If the mission studies conclude that laser-enhanced solar sails would have advantages with respect to ”traditional” solar sails, a detailed study of the laser satellites and the whole system architecture would be the second next step Y1 - 2017 N1 - 68th International Astronautical Congress: Unlocking Imagination, Fostering Innovation and Strengthening Security, IAC 2017, 2017-09-25 → 2017-09-29, Adelaide, Australia ER - TY - CHAP A1 - Dachwald, Bernd ED - Knopf, George K. ED - Otani, Yukitoshi T1 - Light propulsion systems for spacecraft T2 - Optical nano and micro actuator technology Y1 - 2017 SN - 9781315217628 (eBook) SP - 577 EP - 598 PB - CRC Press CY - Boca Raton ER - TY - CHAP A1 - Peterson, Leif Arne A1 - Röth, Thilo A1 - Uibel, Thomas ED - Uibel, Thormas ED - Peterson, Leif Arne ED - Baumann, Marcus T1 - Holzwerkstoffe in Karosseriestrukturen T2 - Tagungsband Aachener Holzbautagung 2017 Y1 - 2017 SN - 2197-4489 SP - 34 EP - 45 ER - TY - JOUR A1 - Barnat, Miriam A1 - Faria, Joana Abelha A1 - Bosse, Elke T1 - Heterogenität und Studierfähigkeit: Erste Ergebnisse einer Längsschnittbefragung JF - Qualität in der Wissenschaft: QiW ; Zeitschrift für Qualitätsentwicklung in Forschung, Studium und Administration Y1 - 2017 SN - 1860-3041 N1 - gedruckt in der Bereichsbibliothek Eupener Str. vorhanden VL - 11 IS - 1 SP - 17 EP - 24 PB - UVW Universitäts-Verlag Webler CY - Bielefeld ER - TY - JOUR A1 - Neu, Eugen A1 - Janser, Frank A1 - Khatibi, Akbar A. A1 - Orifici, Adrian C. T1 - Fully Automated Operational Modal Analysis using multi-stage clustering JF - Mechanical Systems and Signal Processing Y1 - 2017 U6 - http://dx.doi.org/10.1016/j.ymssp.2016.07.031 SN - 0888-3270 VL - Vol. 84, Part A SP - 308 EP - 323 PB - Elsevier CY - Amsterdam ER - TY - CHAP A1 - Barnat, Miriam A1 - Mergner, Julia T1 - Forschungsbasierte Qualitätsentwicklung am Beispiel der Analyse von Lernprozessen und der Wirksamkeit von Förderprogrammen T2 - 3. Internationale Tagung für Qualitätsmanagement und Qualitätsentwicklung im Hochschulbereich 2.-3. Februar 2017 Y1 - 2017 ER -