Multi-kite airborne wind energy systems (MAWES)

[Windy_Skies]

Posted before, several times, but here it is again with some extra links:

Multiple Wing Systems – an Alternative to Upscaling?

After around 11:30 in the talk Moritz Diehl mentions:

https://web.casadi.org/

Applications

CasADi saves time prototyping formulations, solving complex engineering problems, and building professional optimization tools.

The landscape of its academic and industrial applications is diverse:

https://www.youtube.com/watch?v=JI-AyLv68Xs

He also mentions Dynobud, in use at Makani at the time:

GitHub - ghorn/dynobud: your dynamic optimization buddy

And at 14:15 in the talk:

And he was presenting the result from this 2013 study:

https://homes.esat.kuleuven.be/~highwind/wp-content/uploads/2013/08/Zanon2013a.pdf

Airborne Wind Energy Based on Dual Airfoils

Mario Zanon, Sebastien Gros, Joel Andersson and Moritz Diehl

Abstract—The Airborne Wind Energy paradigm proposes to generate energy by flying a tethered airfoil across the wind flow at a high velocity. While Airborne Wind Energy enables flight in higher-altitude, 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. While this technique may improve the efficiency of AWE systems, such improvement can only be achieved through properly balancing the system trajectories and parameters. This paper 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.

Index Terms—Airborne wind energy, dual airfoil, power optimization,
large-scale optimization