elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

FULL SCALE FLAT FLOOR TESTING OF A 500-M²-CLASS SOLAR SAIL DEPLOYER

Richter, Martin and Straubel, Marco and Fernandez, Juan M. and Müller, Daniel Robert (2021) FULL SCALE FLAT FLOOR TESTING OF A 500-M²-CLASS SOLAR SAIL DEPLOYER. ECSSMET 2021, 23.03.2021 - 25.03.2021, Online, Germany.

[img] PDF - Only accessible within DLR
675kB

Abstract

Solar sailing missions rely on deployable systems for large area to mass ratios once in space, while still being small enough for launcher envelopes in the stowed configuration. Many of these deployable systems feature booms that are flattened and subsequently coiled onto a spool/hub. As part of a collaborative deployable space structures research effort of NASA and DLR, a boom deployment mechanism for a future 500 m² solar sail has been developed since 2017. To achieve the respective solar sail size goal, 16.5 m long booms produced by NASA were integrated into a DLR-designed deployer. This considerable size, as well as the lightweight construction of the booms and respective deployable systems makes ground testing a significant challenge. Some systems for gravity compensation and boom alignment will be presented in the paper. However, the main focus is the functional flat floor testing of the integrated boom-deployment mechanism system, as well as its challenges. The testing performed includes full deployment as well as stowage of the booms. Both have been performed multiple times. The latter is one of the key parameters determining packaging efficiency, which in turn confirms design assumptions. During system development, small scale tests and models have been used in preparation of flat floor testing of the 33 m span cross of the full-scale booms and deployment mechanism. Hence a small chapter is also devoted to analysing the differences in behaviour between small- and full-scale deployment systems. More parameters that are vital to design decisions have been determined this way, such as driving belt force or hub brake torque. This paper also focuses on development goals and needs for future steps to achieve higher levels of technology readiness, such as the balancing of driving motor force, synchronisation of its transmission and the countering hub brake torque.

Item URL in elib:https://elib.dlr.de/142596/
Document Type:Conference or Workshop Item (Speech)
Title:FULL SCALE FLAT FLOOR TESTING OF A 500-M²-CLASS SOLAR SAIL DEPLOYER
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Richter, MartinMartin.Richter (at) dlr.deUNSPECIFIED
Straubel, MarcoMarco.Straubel (at) dlr.deUNSPECIFIED
Fernandez, Juan M.juan.m.fernandez (at) nasa.govUNSPECIFIED
Müller, Daniel RobertDaniel.Mueller (at) dlr.deUNSPECIFIED
Date:24 March 2021
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Deployment mechanism, deployable systems, solar sails, carbon fibre booms, functional testing
Event Title:ECSSMET 2021
Event Location:Online, Germany
Event Type:international Conference
Event Dates:23.03.2021 - 25.03.2021
Organizer:DLR, ESA, CNES
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space System Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Space System Technology
DLR - Research theme (Project):R - NASA-DLR Collaboration Deployable Structures JDDS
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Deposited By: Richter, Martin
Deposited On:14 Jun 2021 16:24
Last Modified:14 Jun 2021 16:24

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.