“…In this paper, a fuzzy controller is designed by considering the lateral velocity estimated using a nonlinear observer. In the analysis and design, the vehicle lateral will be represented by a switching systems (Chadli and Darouach, 2011) or by a Takagi-Sugeno (T-S) fuzzy model (Takagi and Sugeno, 1985), largely used these last years (Xioodong and Qingling, 2003;Chadli, Maquin and Ragot, 2005;Kirakidis, 2001;Tanaka and Wang, 1998;Chadli and El Hajjaji, 2006;Guerra and al, 2011;Chadli and Guerra, 2012). It is usually referred to as the bicycle model.…”