1. Department of Mechanical and Materials Engineering; Universitat Politècnica de València; Plaça Ferrandis i Carbonell, 2 03801 Alcoi Alicante Spain
2. Departament of Applied Mathematics; Universitat Politècnica de València; Plaça Ferrandis i Carbonell, 2 03801 Alcoi Alicante Spain
3. Department of Electronics and Electromechanical Engineering; University of Extremadura; Avda Elvas 06071 Badajoz Spain