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Ultralight Deployable Booms for Solar Sails and Other Large Gossamer Structures in Space

Block, Joachim and Straubel, Marco and Wiedemann, Martin (2009) Ultralight Deployable Booms for Solar Sails and Other Large Gossamer Structures in Space. 60th International Astronautical Congress, 12. - 16. October 2009, Daejeon, Republic of Korea.

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Future solar sail spacecraft which do not need any rocket motors and propellants are a promising option for long-term exploration missions in the solar system. However, they will require ultralight reflective foils and deployable booms which will allow for the unfolding of huge sails. The achievement of an acceptable ratio of reflective sail area and structural mass, which results in a still small, but significant acceleration under the photon pressure of sunlight, is extremely challenging. The same challenging deployment technique is required for the unfolding of large reflector membranes or antennas (gossamer structures). The key elements are the booms which must be stowable in a very small envelope before they reach their destination in space. Such booms were developed by DLR and have been successfully tested under zero-g-conditions during a parabolic flight campaign in February 2009. It could be convinc-ingly demonstrated that the unfolding process is both controllable and reproducible. The booms consisted of two co-bonded omega-shaped carbonfiber half shells with 0.1 mm wall thickness each and had a weight of only 62 grams per meter. Two different deployment technologies were tested, one based upon an inflatable 12μm thick polymer hose inside the boom, the other one using an electromechanical uncoiling device at the tip of each boom. In the latter case, the uncoiling devices will radially fly away from the spacecraft, such that they become “expendable deploy-ment mechanisms” and their mass does not count any more for the spacecraft mass that needs to be accelerated or actively controlled.

Item URL in elib:https://elib.dlr.de/63842/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Ultralight Deployable Booms for Solar Sails and Other Large Gossamer Structures in Space
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Date:October 2009
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Solar Sail, Gossamer, Structure, Space, Deployable, CFRP, Booms
Event Title:60th International Astronautical Congress
Event Location:Daejeon, Republic of Korea
Event Type:international Conference
Event Dates:12. - 16. October 2009
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W SY - Technik für Raumfahrtsysteme
DLR - Research area:Space
DLR - Program:W SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):W - Entfaltungstechnologie . Solar Sail (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Deposited By: Ries, Doris
Deposited On:01 Apr 2010 09:21
Last Modified:01 Apr 2010 09:21

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