Computer Science – Performance
Scientific paper
Jul 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.509e..54r&link_type=abstract
In: Proceedings of DASIA 2002, 13 - 16 May 2002, Dublin, Ireland. Ed.: R. A. Harris. ESA SP-509, Noordwijk, Netherlands: ESA Pub
Computer Science
Performance
Space Research: Computing, Software
Scientific paper
A research is being carried out at the Turin Polytechnic University aiming at the design of an HAVE/UAV (High Altitude Very-long Endurance/Uninhabited Air Vehicle) and manufacturing of a scale-sized solar-powered prototype. The vehicle should climg to 17-20 km by taking advantage, mainly, of direct sun radiation and maintaining; electric energy not requeired for propulsion and payload operation is pumped back into the fuel cells energy storage system for the night. A computer program has been developed for carrying out a parametric study for the platform design, by taking into account the solar radiation change over one year, the altitude, masses and efficiencies of solar cells and fuel cells, aerodynamic performances, etc. A parametric study shows as fuel cells and solar cells efficiency and mass give the most influence on the platform dimensions. A wide use of high modulus CFRP has been made in designing the structure in order to minimise the airframe weight. The whole mass resulted of 70 kg. The classical hydraulic loading rig was designed for applying the ultimate shear-bending-torsion load to the structure and to verify the theoretical behaviour. A finite element analysis has been carried out by using the MSC/PATRAN/NASTRAN code in order to predict th static and dynamic behaviour. A good correlation has been obtained between the theoretical, numerical and experimental results up to a load corresponding to 5g.
Frulla Giacomo
Romeo Giulio
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