1. Engineering Materials Group, Faculty of Engineering and Physical Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
2. Department of Control Engineering, Faculty of Electrical Engineering, Czech Technical University in Prague, Technicka 2, Prague 616627, Czech Republic
3. Department of Mechanical Engineering, SEG-CEMMPRE, University of Coimbra, Rua Luís Reis Santos, Coimbra 3030-788, Portugal