1. Mobility Department; AIT Austrian Institute of Technology GmbH; Giefinggasse 2, 1210 Vienna Austria
2. Dipartimento di Ingegneria Elettrica Gestionale e Meccanica; University of Udine; Via delle Scienze 208, 33100 Udine Italy
3. Delft University of Technology, DUWIND; Kluyverweg 1, 2629 HS Delft The Netherlands