Dynamic stabilisation for an Euler-Bernoulli beam equation with boundary control and matched nonlinear disturbance

• Published in: International journal of control Vol. 95; no. 3; pp. 626 - 640
• Main Author: Mei, Zhan-Dong
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 04.03.2022; Taylor & Francis Ltd
• Subjects: Boundary control; Closed loop systems; Control stability; Control systems; Control theory; disturbance estimator; Euler-Bernoulli beam equation; Euler-Bernoulli beams; exponential stabilisation; Feedback control; High gain; Nonlinear control; Output feedback; Riesz basis; well-posedness
• ISSN: 0020-7179; 1366-5820
• DOI: 10.1080/00207179.2020.1808245

In this paper, we are concerned with dynamic stabilisation for a one-dimensional Euler-Bernoulli beam equation with boundary moment control and matched nonlinear uncertain disturbance. In the case of no disturbance, we show that a boundary feedback control law exponentially stabilises the system and Riesz basis generation holds for the closed-loop system. The well-posedness of the system in the sense of Salamon-Weiss, which is essentially important for the design of observer, is verified. We design an infinite-dimensional disturbance estimator, which doesn't need slow variation or high gain or boundedness of the derivation of the disturbance, to estimate the total disturbance. Based on the disturbance estimator, we design an output feedback control law. The Riesz basis generation and exponential stability of a couple system including the original equation is proved. Moreover, the boundedness of the closed-loop system is verified. Some numerical simulations are presented to illustrate the results.