TY - CHAP A1 - Borggräfe, Andreas A1 - Dachwald, Bernd T1 - Mission performance evaluation for solar sails using a refined SRP force model with variable optical coefficients T2 - 2nd International Symposium on Solar Sailing N2 - Solar sails provide ignificant advantages over other low-thrust propulsion systems because they produce thrust by the momentum exchange from solar radiation pressure (SRP) and thus do not consume any propellant.The force exerted on a very thin sail foil basically depends on the light incidence angle. Several analytical SRP force models that describe the SRP force acting on the sail have been established since the 1970s. All the widely used models use constant optical force coefficients of the reflecting sail material. In 2006,MENGALI et al. proposed a refined SRP force model that takes into account the dependancy of the force coefficients on the light incident angle,the sail’s distance from the sun (and thus the sail emperature) and the surface roughness of the sail material [1]. In this paper, the refined SRP force model is compared to the previous ones in order to identify the potential impact of the new model on the predicted capabilities of solar sails in performing low-cost interplanetary space missions. All force models have been implemented within InTrance, a global low-thrust trajectory optimization software utilizing evolutionary neurocontrol [2]. Two interplanetary rendezvous missions, to Mercury and the near-Earth asteroid 1996FG3, are investigated. Two solar sail performances in terms of characteristic acceleration are examined for both scenarios, 0.2 mm/s2 and 0.5 mm/s2, termed “low” and “medium” sail performance. In case of the refined SRP model, three different values of surface roughness are chosen, h = 0 nm, 10 nm and 25 nm. The results show that the refined SRP force model yields shorter transfer times than the standard model. Y1 - 2010 N1 - 2nd International Symposium on Solar Sailing, ISSS 2010, 2010-07-20 - 2010-07-22. New York City College of Technology of the City University of New York, USA SP - 1 EP - 6 ER - TY - CHAP A1 - Matcha, Heike A1 - Ljubas, Ante T1 - Parametric Origami: Adaptable temporary buildings T2 - Future cities: 28th eCAADe Conference Proceedings. eCAADe: Conferences. Zurich, Switzerland Y1 - 2010 SN - 978-0-9541183-7-2 SP - 243 EP - 251 ER - TY - CHAP A1 - Poth, Sebastian A1 - Monzon, Magaly A1 - Tippkötter, Nils A1 - Ulber, Roland T1 - Lignocellulosic biorefinery : process integration of hydrolysis and fermentation T2 - Proceedings / 11th European Workshop on Lignocellulosics and Pulp : August 16 - 19, 2010, Hamburg, Germany Y1 - 2010 SP - 65 EP - 68 PB - vTi CY - Hamburg ER - TY - CHAP A1 - Bitz, Andreas A1 - Kraff, O. A1 - Orzada, S. A1 - Maderwald, S. A1 - Brote, I. A1 - Ladd, M. T1 - Experimental and Numerical Assessment of RF Safety of Transmit Coils at 7 Tesla T2 - ISMRM workshop on MR safety 2010 : RF heating of the human in MRI : workshop series. The Washington County Historic Courthouse, Stillwater, Minnesota, USA, 15 - 17 October 2010 Y1 - 2010 SN - 978-1-62276-088-6 SP - 195 ER - TY - CHAP A1 - Abel, Thomas A1 - Bonin, Dominik A1 - Albracht, Kirsten A1 - Zeller, Sebastian A1 - Brüggemann, Gert-Peter A1 - Burkett, Brendan A1 - Strüder, Heiko K. T1 - Kinematic profile of the elite handcyclist T2 - 28th International Conference on Biomechanics in Sports, Marquette, Michigan, USA, July 19 – 23, 2010 Y1 - 2017 SN - 1999-4168 SP - 140 EP - 141 ER - TY - CHAP A1 - Reindl, Lukas A1 - Park, Jin A1 - Norda, Hannah A1 - Butenweg, Christoph T1 - Seismic design of masonry walls subject to out-of-plane bending T2 - Proceedings of the Tenth International Conference on Computational Structures Technology : Valencia, Spain, 14 - 17 September 2010 / organised in association with: Universidad Politecnica de Valencia ... Ed. by B. H. V. Topping ... Y1 - 2010 SN - 978-1-905088-36-2 U6 - http://dx.doi.org/10.4203/ccp.93.348 SP - Paper 348 PB - Civil-Comp Press CY - Kippen ER - TY - CHAP A1 - Gellert, Christoph A1 - Park, Jin A1 - Butenweg, Christoph T1 - Seismic safety verification of masonry structures T2 - Proceedings of the Eight International Masonry Conference : held in Dresden from 4th to 7th of July 2010 / [International Masonry Society ; Technische Universität Dresden]. Ed. by: Wolfram Jäger ... Volume 1. (Masonry / International Masonry Society Special Publication ; 11) Y1 - 2010 SN - 978-3-00-031381-3 SP - 813 EP - 822 PB - ARGE 8IMC Dresden CY - Radebeul ER - TY - CHAP A1 - Frauenrath, Tobias A1 - Gömmel, Andreas A1 - Butenweg, Christoph A1 - Otten, Mario A1 - Niendorf, Thoralf T1 - 3D mapping of vocal fold geometry during articulatory maneuvers using ultrashort echo time imaging at 3.0 T T2 - ISMRM-ESMRMB joint annual meeting 2010 : Stockholm, Sweden, 1 - 7 May 2010. Band 4 Y1 - 2010 SN - 978-1-617-82008-3 SP - 3087 PB - Curran CY - Red Hook, NY ER - TY - CHAP A1 - Gömmel, Andreas A1 - Niendorf, Thoralf A1 - Frauenrath, Tobias A1 - Otten, Mario A1 - Butenweg, Christoph A1 - Kob, Malte T1 - 3D vocal fold geometry mapping using Magnetic Resonance Imaging T2 - Fortschritte der Akustik : 36. Deutsche Jahrestagung für Akustik ; 15.-18. März 2010, [Berlin ; DAGA 2010] / DEGA ... Wiss. Ed. Michael Möser ... Band 1 Y1 - 2010 SN - 978-3-9808659-8-2 SP - 271 EP - 272 PB - Deutsche Gesellschaft für Akustik CY - Berlin ER - TY - CHAP A1 - Kirsch, Ansgar A1 - Marcher, Thomas T1 - Numerical prediction of time-dependent rock swelling based on an example of a major tunnel project in Ontario/Canada T2 - Numerical methods in geotechnical engineering : (NUMGE 2010) : proceedings of the seventh European Conference on Numerical Methods in Geotechnical Engineering, Trondheim, Norway, 2 - 4 June 2010 / ed. by Thomas Benz ... Y1 - 2010 SN - 978-0-415-59239-0 SP - 297 EP - 302 PB - Taylor and Francis CY - London ER -