“…When the system is subject to unstructured uncertainties in addition to parametric uncertainties, robust adaptive control is usually the preferred method. Robust adaptive control was applied to surface vessels (Annamalai, Sutton, Yang, Culverhouse, & Sharma, 2015;Do, 2016), robot manipulators (Carrasco-Elizalde & Goldsmith, 2015;Tatlicioglu, 2010;Yu, Fei, Sun, Huang, & Yang, 2014, mechatronic systems (Bidikli, Tatlicioglu, & Zergeroglu, 2015;Fei & Zhou, 2012), electrical systems (Khooban, Niknam, Blaabjerg, Davari, & Dragicevic, 2016;Tan, Su, Zhao, & Tan, 2015), multi-input multi-output nonlinear systems Hussain, Annaswamy, & Lavretsky, 2016;Jafari & Ioannou, 2016;Yildiz & Annaswamy, 2015;, and aerial vehicles (Wise, Lavretsky, Gadient, & Ioannou, 2015;Xu, 2015;Zhao, Xian, Zhang, & Zhang, 2015;Zou, Wang, Zou, & Zong, 2015;Zou, 2016). In the controller design, an adaptive term fused with integral of the sign of the tracking error feedback is utilised.…”