1. Federal Institute of Education, Science and Technology of Ceará – IFCEFortaleza‐CeBrazil
2. Department of Electrical EngineeringFederal University of CearáCaixa Postal 6001 – Campus do Pici60455‐760Fortaleza – CeBrazil
3. Department of Agricultural EngineeringFederal University of CearáCaixa Postal 6001 – Campus do Pici60455‐760Fortaleza – CeBrazil
4. Department of Mechanical EngineeringFederal University of Sergipe49100‐000Aracajú – SeBrazil