Laboratory experiments with a laser-based attachment mechanism for spacecraft at small bodies

Show simple item record Anthony, Niklas Frostevarg, Jan Suhonen, Heikki Granvik, Mikael 2021-10-21T05:40:02Z 2021-10-21T05:40:02Z 2021-12
dc.identifier.citation Anthony , N , Frostevarg , J , Suhonen , H & Granvik , M 2021 , ' Laboratory experiments with a laser-based attachment mechanism for spacecraft at small bodies ' , Acta Astronautica , vol. 189 , pp. 391-397 .
dc.identifier.other PURE: 169656755
dc.identifier.other PURE UUID: 4bbad001-b3f1-496a-a103-2b1bf639a53d
dc.identifier.other WOS: 000703817900035
dc.identifier.other ORCID: /0000-0002-5624-1888/work/101863721
dc.identifier.other ORCID: /0000-0002-0337-6308/work/101865520
dc.description.abstract We present the results of two sets of experiments that investigate laser-based metal-to-rock attachment techniques. Asteroids and comets have low surface gravity which pose a challenge to landers with moving parts. Such parts can generate torques and forces which may tip the lander over or launch it into deep space. Thus, if a lander on a small body is to have moving parts, the spacecraft must be equipped with an anchoring mechanism. To this end, we sought to use a laser to melt and bind a piece of metal mimicking a part of a spacecraft to a rock mimicking the surface of a typical asteroid. In the first set of experiments, extra material was not fed in during the processing. The second set were performed using a standard wire feeder used in laser welding, which added metal to the experiment during processing. During the first experiments, we discovered that a traditional weld, where two melt pools mix and solidify to form a strong bond, was not possible-the melt pools would not mix, and when they did, the resulting weld was extremely brittle. The second set of experiments resulted in a physico-mechanical bond, where a hole was drilled with a laser, and a wire was melted and fed into the hole. These latter experiments were successful in forming bonds as strong as 115 N. Such an attachment mechanism can also be used to maneuver small boulders on asteroid surfaces, to redirect small, monolithic asteroids, or in space-debris removal. en
dc.format.extent 7
dc.language.iso eng
dc.relation.ispartof Acta Astronautica
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject Spacecraft anchoring
dc.subject Laser drilling
dc.subject High-speed imaging
dc.subject X-ray micro-tomography
dc.subject Asteroid mining
dc.subject 115 Astronomy, Space science
dc.title Laboratory experiments with a laser-based attachment mechanism for spacecraft at small bodies en
dc.type Article
dc.contributor.organization Department of Physics
dc.contributor.organization Planetary-system research
dc.description.reviewstatus Peer reviewed
dc.relation.issn 0094-5765
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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