BALTHAZAR, JOSE MANOEL, UTFPR –FEDERAL UNIVERSITY OF TECHNOLOGY –PARANÁ, DEPARTMENT OF ELECTRONICS, AV. MONTEIRO LOBATO, KM 04, 84016-210, PONTA GROSSA –PR, BRAZIL / UNESP –SÃO PAULO STATE UNIVERSITY, DEPARTMENT OF MECHANICAL ENGINEERING, AV. ENGENHEIRO LUIZ EDMUNDO CARRIJO COUBE, 14-01, 17033-360, BAURU –SP, BRAZIL, Brazil