Robust Nonlinear Control of a Three-Tank System in the Presence of Mismatched Uncertainties. Issue 1 (July 2017)

• Record Type: Journal Article
• Authors: Yang, Zi-Jiang; Sugiura, Hiroyuki
• Is Part Of: IFAC-PapersOnLine. Volume 50:Issue 1(2017)
• Page Start: 4088
• Page End: 4093
• Publication Date: 2017-07
• Subjects: Three-tank system -- finite-time disturbance observer -- dynamic surface control -- backstepping design -- mismatched uncertainty; Automatic control -- Periodicals; 629.805
• DOI: 10.1016/j.ifacol.2017.08.793
• Languages: English
• ISSNs: 2405-8963

Abstract

Abstract: In this paper, we propose a finite-time disturbance observer-based robust control method for output tracking of the Inteco three-tank system in the presence of mismatched uncertainties. The controller is designed in a backstepping manner. At each step of the virtual controller design, a robust feedback controller with some effective nonlinear damping terms is designed so that the system states remain in the feasible domain. The virtual controller is enhanced by a finite-time disturbance observer, and the dynamic surface control technique is adopted for the virtual controller to avoid the shortcoming of "explosion of terms". Theoretical analysis is performed and simulation studies on the Inteco three-tank system model are included.