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dc.contributor.authorGarmendia, Iñaki
dc.contributor.authorAnglada, Eva
dc.date.accessioned2022-09-06T14:48:46Z
dc.date.available2022-09-06T14:48:46Z
dc.date.issued2022-10
dc.identifier.issn0094-5765en
dc.identifier.urihttp://hdl.handle.net/11556/1401
dc.description.abstractThere are always differences between the computer predicted temperatures of a spacecraft thermal model and the temperatures measured during the mandatory laboratory thermal tests. As a consequence, the model must be correlated before the spacecraft is launched to space, in order to identify the correct parameters that match the experimentally measured temperatures. A new technique is presented to identify the parameters, based on the minimization of the error of the transient equations which governs the heat transfer in the spacecraft. The steady state minimization was presented in a previous work, but the transient techniques presented hereafter enable a better and more extended identification of parameters despite the higher complexity of the computational problem. The use of a set of available subroutines (TOLMIN), which permits the constrained optimization of a general function, makes possible to ensure that the obtained parameters are non-negative, a requirement to have physical sense. The gradient function must be calculated for each problem, but this can be done automatically. Results show that for small and medium size transient Thermal Mathematical Models (TMM), a good correlation of thermal parameters can be achieved even if some of the nodes temperatures are not measured in the thermal tests.en
dc.description.sponsorshipThe findings presented in this paper are fruit of independent research. No financial assistance was received. I.G. wants to thank Dr. A. Usarraga for helping with a friendly environment where initial steps of this work were devised.en
dc.language.isoengen
dc.publisherElsevier Ltden
dc.titleTransient thermal parameters correlation of spacecraft thermal models against test resultsen
dc.typejournal articleen
dc.identifier.doi10.1016/j.actaastro.2022.07.014en
dc.rights.accessRightsopen accessen
dc.subject.keywordsModel correlationen
dc.subject.keywordsThermal mathematical modelen
dc.subject.keywordsTransient problemen
dc.subject.keywordsThermal controlen
dc.subject.keywordsGradient based algorithmen
dc.journal.titleActa Astronauticaen
dc.page.final57en
dc.page.initial49en
dc.volume.number199en


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