Event-triggered adaptive prescribed performance control of uncertain nonlinear systems with unknown control directions

Nan-Nan Zhao; Xin-Yu Ouyang; Li-Bing Wu; Feng-Rui Shi

doi:10.1016/j.isatra.2020.08.027

Event-triggered adaptive prescribed performance control of uncertain nonlinear systems with unknown control directions

ISA Trans. 2021 Feb:108:121-130. doi: 10.1016/j.isatra.2020.08.027. Epub 2020 Aug 22.

Authors

Nan-Nan Zhao¹, Xin-Yu Ouyang², Li-Bing Wu³, Feng-Rui Shi⁴

Affiliations

¹ School of Electronic and Information Engineering, University of Science and Technology Liaoning, Anshan, Liaoning, 114051, PR China. Electronic address: zhaonannan@ustl.edu.cn.
² School of Electronic and Information Engineering, University of Science and Technology Liaoning, Anshan, Liaoning, 114051, PR China. Electronic address: ouyangxinyu@ustl.edu.cn.
³ School of Science, University of Science and Technology Liaoning, Anshan, Liaoning, 114051, PR China. Electronic address: beyondwlb@163.com.
⁴ School of Electronic and Information Engineering, University of Science and Technology Liaoning, Anshan, Liaoning, 114051, PR China. Electronic address: 812742294@qq.com.

PMID: 32861476
DOI: 10.1016/j.isatra.2020.08.027

Abstract

The problem of event-triggered prescribed performance control for a class of uncertain nonlinear systems with unknown control directions and faults is investigated. Compared with the existing methods, a new set of error transformation functions is defined for the first time. Although no approximate structure is adopted, prescribed performance control (PPC) and event triggered control (ETC) are realized simultaneously for the nonlinear system considered in this paper for the first time. The proposed control scheme can guarantee that all closed-loop signals are bounded, and the tracking error, as well as all state errors, converges within the adjustable constraint functions. Finally, two simulation experiments verify the effectiveness of the proposed algorithm.

Keywords: Event-triggered control (ETC); Fault-tolerant control (FTC); Nonlinear systems; Prescribed performance control (PPC); Unknown control direction.