Event-triggered active disturbance rejection control for a class of networked systems with unmatched uncertainties: Theoretic and experimental results. (October 2021)

• Record Type: Journal Article
• Authors: Cui, Kaixin; Tang, Shu-Xia; Huang, Yuan; Yu, Hao; Shi, Dawei
• Is Part Of: Control engineering practice. Volume 115(2021)
• Publication Date: 2021-10
• Subjects: Event-triggered control -- Networked system -- Active disturbance rejection control -- Unmatched uncertainty -- Backstepping; Automatic control -- Periodicals; 629.89
• DOI: 10.1016/j.conengprac.2021.104907
• Languages: English
• ISSNs: 0967-0661

Abstract

Abstract: In this work, an event-triggered control problem for a class of networked systems with unmatched uncertainties is investigated based on an active disturbance rejection control approach. To estimate the effect of unmatched uncertainties, a bank of extended state observers with guaranteed convergence is proposed. Based on the obtained estimates, a tracking-differentiator-enabled Zeno-free event-triggering condition is introduced with reduced sampling cost. An event-triggered controller is then designed to guarantee the closed-loop stability of the networked system with unmatched uncertainties, leveraging a backstepping control approach. Implementation issues of the proposed approach are discussed, and the effectiveness of the results is illustrated through experimental results on a DC torque motor platform.