2020-08-13T20:14:58Z
http://oa.upm.es/cgi/oai2
oai:oa.upm.es:50247
2019-12-01T23:30:05Z
7374617475733D707562
7375626A656374733D6165726F6E617574696361
747970653D61727469636C65
Correlation of spacecraft thermal mathematical models to reference data
Torralbo Gimeno, Ignacio
Perez Grande, M. Isabel
Sanz Andres, Angel Pedro
Piqueras Carreño, Javier
Aeronautics
Model-to-test correlation is a frequent problem in spacecraft-thermal control design. The idea is to determine the values of the parameters of the thermal mathematical model (TMM) that allows reaching a good ?t between the TMM results and test data, in order to reduce the uncertainty of the mathematical model. Quite often, this task is performed manually, mainly because a good engineering knowledge and experience is needed to reach a successful compromise, but the use of a mathematical tool could facilitate this work. The correlation process can be considered as the minimization of the error of the model results with regard to the reference data. In this paper, a simple method is presented suitable to solve the TMM-to-test correlation problem, using Jacobian matrix formulation and Moore-Penrose pseudo-inverse, generalized to include several load cases. Aside, in simple cases, this method also allows for analytical solutions to be obtained, which helps to analyze some problems that appear when the Jacobian matrix is singular. To show the implementation of the method, two problems have been considered, one more academic, and the other one the TMM of an electronic box of PHI instrument of ESA Solar Orbiter mission, to be ?own in 2019. The use of singular value decomposition of the Jacobian matrix to analyze and reduce these models is also shown. The error in parameter space is used to assess the quality of the correlation results in both models.
E.T.S.I. Aeronáuticos (UPM)
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
2017-11
info:eu-repo/semantics/article
Article
Acta Astronautica, ISSN 0094-5765, 2017-11, No. 144
PeerReviewed
application/pdf
eng
https://www.sciencedirect.com/science/article/pii/S0094576517313334
ESP2013-47439-C6-4-R
ESP2014-56169-C6-6-R
2016-77548-C5-3-R
FPU15/05618
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.actaastro.2017.12.033
http://oa.upm.es/50247/