eprintid: 4025 rev_number: 8 eprint_status: archive userid: 87 dir: disk0/00/00/40/25 datestamp: 2018-03-12 10:50:31 lastmod: 2018-03-12 10:50:31 status_changed: 2018-03-12 10:50:31 type: article metadata_visibility: show creators_name: Zanon, Mario creators_name: Gros, Sebastien creators_name: Andersson, Joel creators_name: Diehl, Moritz creators_id: mario.zanon@imtlucca.it creators_id: creators_id: creators_id: title: Airborne Wind Energy Based on Dual Airfoils ispublished: pub subjects: T1 divisions: CSA full_text_status: public abstract: The airborne wind energy (AWE) paradigm proposes to generate energy by flying a tethered airfoil across the wind flow at a high velocity. Although AWE enables flight in higher altitude and stronger wind layers, the extra drag generated by the tether motion imposes a significant limit to the overall system efficiency. To address this issue, two airfoils with a shared tether can reduce overall system drag. Although this technique may improve the efficiency of AWE systems, such improvement can only be achieved through properly balancing the system trajectories and parameters. This brief tackles that problem using optimal control. A generic procedure for modeling multiple-airfoil systems with equations of minimal complexity is proposed. A parametric study shows that at small and medium scales, dual-airfoil systems are significantly more efficient than single-airfoil systems, but they are less advantageous at very large scales. date: 2013 date_type: published publication: IEEE Transactions on Control Systems Technology volume: 21 number: 4 publisher: IEEE pagerange: 1215-1222 id_number: doi:10.1109/TCST.2013.2257781 refereed: TRUE issn: 1063-6536 official_url: http://doi.org/10.1109/TCST.2013.2257781 citation: Zanon, Mario and Gros, Sebastien and Andersson, Joel and Diehl, Moritz Airborne Wind Energy Based on Dual Airfoils. IEEE Transactions on Control Systems Technology, 21 (4). pp. 1215-1222. ISSN 1063-6536 (2013) document_url: http://eprints.imtlucca.it/4025/1/12-83.pdf