Evolutionary design of a satellite thermal control system: Real experiments for a CubeSat mission
Author
dc.contributor.author
Escobar, Emanuel
Author
dc.contributor.author
Díaz, Marcos
Author
dc.contributor.author
Zagal Montealegre, Juan
Admission date
dc.date.accessioned
2016-12-23T16:34:02Z
Available date
dc.date.available
2016-12-23T16:34:02Z
Publication date
dc.date.issued
2016
Cita de ítem
dc.identifier.citation
Applied Thermal Engineering. Volumen: 105 Páginas: 490-500 Número especial: SI
es_ES
Identifier
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10.1016/j.applthermaleng.2016.03.024
Identifier
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https://repositorio.uchile.cl/handle/2250/142068
Abstract
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This paper studies the use of artificial evolution to automate the design of a satellite passive thermal control system. This type of adaptation often requires the use of computer simulations to evaluate fitness of a large number of candidate solutions. Simulations are required to be expedient and accurate so that solutions can be successfully transferred to reality. We explore a design process that involves three steps. On a first step candidate solutions (implemented as surface paint tiling patterns) are tested using a FEM model and ranked according to their quality to meet mission temperature requirements. On a second step the best individual is implemented as a real physical satellite mockup and tested inside a vacuum chamber, having light sources imitating the effect of solar light. On a third step the simulation model is adapted with data obtained during the real evaluation. These updated models can be further employed for continuing genetic search. Current differences between our simulation and our real physical setup are in the order of 1.45 K mean squared error for faces pointing toward the light source and 2.4 K mean squared errors for shadowed faces. We found that evolved tiling patterns can be 5 K below engineered patterns and 8 K below using unpainted aluminum satellite surfaces. (C) 2016 Elsevier Ltd. All rights reserved.