Multi-disciplinary shape optimization of an entry capsule integrated with custom neural network approximation and multi-delity approach

Claudio Cavallero, Cosimo Chiarelli, Vincenzo Mareschi, Alessio Davite, Federico Gallizio, Edmondo Minisci, Martins Sudars

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Abstract

This paper describes a new integrated approach for the multi-disciplinary optimization of a entry capsule’s shape. Aerothermodynamics, Flight Mechanics and Thermal Protection System behaviour of a reference spaceship when crossing Martian atmosphere are considered, and several analytical, semi-empirical and numerical models are used. The multi-objective and multi-disciplinary optimization process implemented in Isight software environment allows finding a Pareto front of best shapes. The optimization process is integrated with a set of artificial neural networks, trained and updated by a multi-fidelity evolution control approach, to approximate the objective and constraint functions. Results obtained by means of the integrated approach with neural networks approximators are described and compared to the results obtained by a different optimization process, not using the approximators. The comparison highlights advantages and possible drawbacks of the proposed method, mainly in terms of calls to the true model and precision of the obtained Pareto front.
Original languageEnglish
Number of pages16
Publication statusPublished - 14 Sep 2011
EventEurogen 2011 Conference - Capua, Italy
Duration: 14 Sep 201116 Nov 2011

Conference

ConferenceEurogen 2011 Conference
CountryItaly
CityCapua
Period14/09/1116/11/11

Keywords

  • spacecraft shape optimization
  • multi-disciplinary optimization
  • meta-modelling
  • artificial neural networks
  • Isight

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    Cavallero, C., Chiarelli, C., Mareschi, V., Davite, A., Gallizio, F., Minisci, E., & Sudars, M. (2011). Multi-disciplinary shape optimization of an entry capsule integrated with custom neural network approximation and multi-delity approach. Paper presented at Eurogen 2011 Conference, Capua, Italy.