[1] Sao Paulo State Univ, Fac Mech Engn, BR-17033360 Bauru, SP, Brazil
[2] Fed Univ Technol Parana UTFPR, Dept Elect, BR-84017220 Ponta Grossa, PR, Brazil
[3] Fed Univ Technol Parana UTFPR, Dept Math, BR-84016210 Ponta Grossa, PR, Brazil
[4] Univ Sao Paulo EP USP, Dept Telecommun & Control Engn PTC, Automat & Control Lab LAC, Polytech Sch, BR-05508010 Sao Paulo, SP, Brazil
[5] Fed Univ Mato Grosso UFMS, Phys Inst, BR-79070900 Campo Grande, MS, Brazil