1. Technology Center, Federal University of Santa Maria (UFSM), Santa Maria 97105-900, Brazil
2. Automation and Intelligent Systems, ITR-Norte, Technological University of Uruguay (UTEC), Rivera 40000, Uruguay
3. Department of Electrical Engineering, Federal Technological University of Paraná (UTFPR), Campus Pato Branco, Pato Branco 85503-390, Brazil
4. Department of Electrical Engineering, Electronics, Communications and Systems, University of Oviedo (UNIOVI), 33204 Gijón, Spain