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- W2274702346 abstract "MASCOT is a lander built by DLR, embarked on JAXA’s Hayabusa-2, a scientific mission to study theasteroid 162173 1999 JU3. It is a small lander, less than 300x300x200mm?, with onboard payloads(camera, magnetometer, radiometer and IR spectrometer), developed in collaboration by DLR andCNES. MASCOT lands on the asteroid surface, after being released by Hayabusa-2 from a very closeposition above the asteroid surface, and investigates the asteroid surface. The thermal design of the landerrepresents one of the main challenges in the whole project because of multiple constraints, depending onthe mission phase, mass, power and free space available.MASCOT, notwithstanding its small size, is equipped with redundant heat-pipe system, MLI blanket,heaters. The thermal design of the lander has been chosen after a trade-off phase concerning thetechnology which could suit better the opposing requirements of the mission: low heat exchange betweenthe lander and the exterior (including the main spacecraft) in cruise, possibility to transfer all the heatdissipated by the internal paylaods and electronic boards during operations on asteroid surface. Afterselecting the heat-pipe technology as baseline, a development phase was undertaken by the partners bothin terms of manufacturing, testing, thermal characterization phase and analitical modelling in order tomatch the thermal requirements.Heaters are used to assure the survival of the most delicated parts of the lander during cold cruise phases:the battery cells (only primary battery on-board), the electronic boards and the main payload. Strictrequirements are given by the main spacecraft in terms of maximum power available to heat the landerduring cruise. MLI blankets are used where the available space allows it, e.g. to extra insulate the Eboxfrom the rest of the lander creating a „hot compartment and between the lander and the main spacecraftto reduce the heat exchange with it during cruise below the given limits. The whole thermal concept inall its parts undertook a detailed modelling phase in parallel to an experimental phase in vacuum chamberto improve the model and to qualify the system." @default.
- W2274702346 created "2016-06-24" @default.
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- W2274702346 date "2014-02-01" @default.
- W2274702346 modified "2023-09-26" @default.
- W2274702346 title "MASCOT Thermal subsystem design" @default.
- W2274702346 hasPublicationYear "2014" @default.
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