Multiobjective Optimization of Thermal Control Strategies for Multifunctional Structures
Publication: Journal of Aerospace Engineering
Volume 27, Issue 4
Abstract
A thermomechanical electronic multifunctional structure prototype has been modeled and optimized. The model focuses on the description of thermal and electrical phenomena, but leaves aside structural issues. It couples a three-dimensional thermal network with representations of different possible thermal control laws, namely on/off control, proportional logic, proportional-integral-derivative strategy, and the usage of positive temperature coefficient heaters. The parametric model was first validated and correlated through a comparison with simple physical solutions, and then with the actual results of a thermal vacuum test. Multiobjective optimization (based on genetic algorithms) has been used to define the best heater layout options, to identify the best control strategy in terms both of panel isothermia and energy consumption, and to fine-tune the parameters of the selected control strategy. The research reported in this paper has led to the definition of an optimal thermal control solution. An examination of the optimization results has shown that the simultaneous adjustment of the geometrical layout as well as the control strategy and its parameters can lead to energy savings of about 52%.
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Acknowledgments
The research reported in this paper, which was carried out at the Politecnico di Torino, is based on a demonstrator breadboard that was designed and built by Thales Alenia Space, Italia (BSSIT Thermal Systems, Turin). The writers wish to thank the BSSIT Thermal Systems group of Thales Alenia Space, Italy, for the disclosure on the ABB technical data and on the technologies under development in the framework of the ROV-E EC FP-7 Project.
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Published In
Journal of Aerospace Engineering
Volume 27 • Issue 4 • July 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Sep 11, 2012
Accepted: Mar 4, 2013
Published online: Apr 17, 2014
Published in print: Jul 1, 2014
Discussion open until: Sep 17, 2014
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