“…The multivariable adaptive control research has tackled many important and challenging problems and derived numerous rigorous and promising solutions, for example: pole placement control (Arruti & Florez, 1992); adaptive H ∞ tracking control (Chang, 2001); data-based adaptive switching control (Chai, Zhang, & Su, 2011); adaptive switching control (Chang & Davison, 1999;Kosmatopoulos & Ioannou, 2002); adaptive control of nonlinear systems with input constraints (Chen, Ge, & Ren, 2011;Leonessa, Haddad, Hayakawa, & Morel, 2009); adaptive control of time-delay systems (Chen, Liu, Liu, & Lin, 2009;Ohkawa & Yonezawa, 1982;Zhang & Ge, 2007); variable structure adaptive control (Chien, Sun, Wu, & Fu, 1996;Zinober, El-Ghezawi, & Billings, 1982); multivariable adaptive control of discrete-time systems (de la Sen & Paz, 1985;Garrido & Lozano, 1994;Li & Yang, 2013;Liang, Ishitobi, & Zhu, 2003;Moctezuma & Lozano, 1995;Shah, Mohtadi, & Clarke, 1987;Thathachar & Gajendran, 1981;Wang & Lang, 1990); parameter convergence in multivariable recursive identification (de Mathelin & Bodson, 1990;Ding & Chen, 2005); composite adaptive posicast control (Dydek, Annaswamy, Slotine, & Lavretsky, 2013); adaptive observers for nonlinearly parametrized systems (Farza, M'Saad, Maatoug, & Kamoun, 2009); adaptive stabilization via switching control (Fu & Barmish, 1986); adaptive control of stochastic systems with backlash inputs (Han, Zhang, & Gu, 1993); sliding mode control (Bartolini, Ferrara, & Utkin, 1995;Chen, 2006;Hsu, Costa, & Cunha, 2003;…”