Multi-Rotor Wind Turbine Control Challenge - A Benchmark for Advanced Control Development. - Sorenserr, Kim Hylling; Knudsen, Torben; Filsoof, Oliver Tierdad; Hovgaard, Tobias Gybel; Grunnet, Jacob Deleuran; Neto, Julio Xavier Vianna; Wisniewski, Rafal (2018)