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A trade-off study on the mechanical support structure of the MASCOT-2 small body lander package

Lange, Michael and Hühne, Christian and Lange, Caroline and Mierheim, Olaf (2017) A trade-off study on the mechanical support structure of the MASCOT-2 small body lander package. IAC 2017, 25.-29.09.2017, Adelaide, Australien.

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Abstract

The Mobile Asteroid surface SCOuT (MASCOT) is a 11 kg small body lander package developed under DLR lead for the Japanese space probe Hayabusa2. Based on MASCOT a modified MASCOT-2 lander package was studied for the AIM (Asteroid Impact Mission) mission study. The objective of the study was to develop a lander package, which maximizes heritage and reuse from the MASCOT predecessor. Thus the landing module’s framework structure retained the MASCOT design variant, being up-scaled by approx. 20% (MASCOT-2: 330mm x 300mm x 210mm, 13 kg). In contrast, the interface structure called Mechanical and Electrical Support Structure (MESS) experienced a more significant re-design, due to the need of interface simplification and the peculiarities of the lander deployment for AIM mission and the Didymos system. This paper introduces three possible design variants for the MESS, which are later narrowed down to two and presented in greater detail: a CFRP-honeycomb sandwich plate with additional unidirectional stiffening plies and an X-shaped solid CFRP hat beam structure. Both variants are much simplified compared to the MASCOT support structure, but retain the overall mounting variant. This conceptual discussion is followed by a detailed structural analysis of both mechanical support structures. Provided by a set of mechanical loads and stiffness requirements, the sandwich and beam interface structures are separately simulated in a finite element model, consisting of shell and beam elements, respectively. The attached landing module is modelled with both, shell and beam elements, allowing a coupled structural analysis of the system. By varying geometrical and material parameters in the structural MESS models, a trade-off between the resulting minimal masses, the stiffness and the strength requirements is performed. Specifically considering also development risks it is concluded that the sandwich design variant shows an overall better performance.

Item URL in elib:https://elib.dlr.de/114113/
Document Type:Conference or Workshop Item (Speech)
Title:A trade-off study on the mechanical support structure of the MASCOT-2 small body lander package
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lange, MichaelM.Lange (at) dlr.dehttps://orcid.org/0000-0003-0095-3605
Hühne, ChristianChristian.Huehne (at) dlr.deUNSPECIFIED
Lange, CarolineCaroline.Lange (at) dlr.dehttps://orcid.org/0000-0002-1709-3667
Mierheim, OlafOlaf.Mierheim (at) dlr.deUNSPECIFIED
Date:September 2017
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Accepted
Keywords:MASCOT, AIM, interface structure, CFRP, finite element simulation
Event Title:IAC 2017
Event Location:Adelaide, Australien
Event Type:international Conference
Event Dates:25.-29.09.2017
Organizer:IAF
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):R - Projekt Mascot (Bus)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Institute of Space Systems > Land and Exploration Technology
Deposited By: Lange, Michael
Deposited On:17 Oct 2017 11:44
Last Modified:31 Jul 2019 20:11

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