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GoSolAr – A Gossamer Solar Array Concept for High Power Spacecraft Applications using flexible Photovoltaics

Spröwitz, Tom and Grundmann, Jan Thimo and Haack, Frederik and Hillebrandt, Martin and Martens, Hauke and Meyer, Sebastian and Reershemius, Siebo and Reininghaus, Nies and Sasaki, Kaname and Seefeldt, Patric and Sergeev, Oleg and Spietz, Peter and Sznajder, Maciej and Toth, Norbert and Vehse, Martin and Wippermann, Torben and Zander, Martin E. (2019) GoSolAr – A Gossamer Solar Array Concept for High Power Spacecraft Applications using flexible Photovoltaics. In: IEEE aerospace. IEEE Aerospace Conference, 03.-08. März 2019, Big Sky, USA.

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Abstract

The power demand for future satellite applications will continue to rise. Geostationary telecom-munication satellites currently approach a power level of up to 20 kW. Future spacecraft will provide yet more transponders and/or direct mobile-satellite services. Electric propulsion is in-creasingly used for station keeping, attitude control and GEO circularization. Interplanetary mis-sions already use kW-range electric propulsion. Space Tugs are studied for several fields. Suitable engines require 100 kW or more. The envisaged use of such engines and the operation of future GEO satellites lead to a renewed interest in large, deployable and ultra-lightweight power gen-erators in space. Within the GoSolAr (Gossamer Solar Array) activity, DLR develops a new photovoltaic array technology for power generation. It is based on the DLR Gossamer approach using lightweight, deployable CFRP booms and a polymer membrane covered with thin-film CIGS photovoltaics. The booms are arranged in a crossed configuration with a central deployment unit. The photovol-taic area is composed of one large square membrane with double folding using two-dimensional deployment. Even though the efficiency of thin-film photovoltaics is currently only about 1/3 of that of con-ventional photovoltaics, a membrane based array can already achieve better mass/power ratios. A 50 kW array requires an area of approximately 20 m x 20 m. In a first step, DLR develops a fully functional 5 m x 5 m demonstrator partially covered with thin-film photovoltaics, using the DLR small satellite platform S2TEP. Space compatible thin-film photovoltaics need to be select-ed and tested. They are integrated on standardized generator modules that will be assembled into a large, foldable and deployable membrane. A controlled deployment of structure and membrane, and a sufficiently stiff support structure for operation are key development topics. We present the conceptual design of the GoSolAr demonstrator, the main requirements, prelimi-nary technical budgets and the development strategy. An overview will be given on the selection and the maturity of the key technologies and subsystems, such as deployable membrane with in-tegrated photovoltaic generators; deployable CFRP booms including deployment mechanisms; photovoltaic cell selection and integration to generator units; the array harness concept as well as the electronics concept, for operation and photovoltaics characterization. Furthermore, an over-view of the first manufactured breadboard models and their testing will be presented, e.g. com-bined testing of booms and mechanically representative generator arrays to evaluate deployment and interface forces for the preliminary design.

Item URL in elib:https://elib.dlr.de/126841/
Document Type:Conference or Workshop Item (Speech)
Title:GoSolAr – A Gossamer Solar Array Concept for High Power Spacecraft Applications using flexible Photovoltaics
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Spröwitz, TomTom.Sproewitz (at) dlr.dehttps://orcid.org/0000-0001-5369-6919
Grundmann, Jan Thimojan.grundmann (at) dlr.dehttps://orcid.org/0000-0002-8809-0981
Haack, Frederikfrederik.haack (at) dlr.deUNSPECIFIED
Hillebrandt, MartinMartin.Hillebrandt (at) dlr.deUNSPECIFIED
Martens, HaukeHauke.Martens (at) dlr.deUNSPECIFIED
Meyer, SebastianSebastian.Meyer (at) dlr.deUNSPECIFIED
Reershemius, SieboSiebo.Reershemius (at) dlr.deUNSPECIFIED
Reininghaus, NiesNies.reininghaus (at) dlr.deUNSPECIFIED
Sasaki, KanameKaname.Sasaki (at) dlr.deUNSPECIFIED
Seefeldt, Patricpatric.seefeldt (at) dlr.deUNSPECIFIED
Sergeev, Olegoleg.sergeev (at) dlr.deUNSPECIFIED
Spietz, PeterPeter.Spietz (at) dlr.deUNSPECIFIED
Sznajder, MaciejMaciej.Sznajder (at) dlr.dehttps://orcid.org/0000-0002-9917-0581
Toth, NorbertNorbert.Toth (at) dlr.deUNSPECIFIED
Vehse, Martinmartin.vehse (at) dlr.deUNSPECIFIED
Wippermann, TorbenTorben.Wippermann (at) dlr.dehttps://orcid.org/0000-0002-0354-6557
Zander, Martin E.Martin.Zander (at) dlr.dehttps://orcid.org/0000-0001-5972-2938
Date:March 2019
Journal or Publication Title:IEEE aerospace
Refereed publication:Yes
Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Solar Arrays, deployment Systems, flexible photovoltaic, environmental testing, deployment testing
Event Title:IEEE Aerospace Conference
Event Location:Big Sky, USA
Event Type:international Conference
Event Dates:03.-08. März 2019
Organizer:AIAA
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):Huge Solar Array
Location: Bremen
Institutes and Institutions:Institute of Space Systems > Mechanic and Thermal Systems
Institute of Space Systems > Systems Engineering and Project Office
Institute of Space Systems > Avionics Systems
Institute of Composite Structures and Adaptive Systems
Deposited By: Spröwitz, Tom
Deposited On:20 Mar 2019 12:38
Last Modified:20 Mar 2019 12:38

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