Adaptive control of a class of strict-feedback time-varying nonlinear systems with unknown control coefficients. (July 2018)

• Record Type: Journal Article
• Authors: Huang, Jiangshuai; Wang, Wei; Wen, Changyun; Zhou, Jing
• Is Part Of: Automatica. Volume 93(2018)
• Page Start: 98
• Page End: 105
• Publication Date: 2018-07
• Subjects: Adaptive control -- Unknown control directions -- Nussbaum function; Automatic control -- Periodicals; Automation -- Periodicals; 629.805
• DOI: 10.1016/j.automatica.2018.03.061
• Languages: English
• ISSNs: 0005-1098

Abstract

Abstract: In this paper, robust adaptive control of a class of strict-feedback nonlinear systems with unknown control directions is investigated. A novel Nussbaum-type function is developed and a key theorem is drawn which involves quantifying the addition of multiple Nussbaum functions with different control directions in a single inequality. Global stability of the closed-loop system and asymptotic stabilization of system output are proved. A simulation example is given to illustrate the effectiveness of the proposed control scheme.