Output feedback stabilization for multi-dimensional Kirchhoff plate with general corrupted boundary observation

• Published in: European journal of control Vol. 28; pp. 38 - 48
• Main Authors: Guo, Bao-Zhu, Zhou, Hua-Cheng
• Format: Journal Article
• Language: English
• Published: Philadelphia Elsevier Ltd 01.03.2016; Elsevier Limited
• Subjects: Boundary control; Closed loop systems; Disturbance rejection; Feedback control systems; Kirchhoff plate; Mathematical models; Partial differential equations; Stabilization; Vibration analysis; Boundary control; Disturbance rejection; Stabilization; Kirchhoff plate
• ISSN: 0947-3580; 1435-5671
• DOI: 10.1016/j.ejcon.2015.12.004

We consider boundary output feedback stabilization for a multi-dimensional Kirchhoff plate with boundary observation suffered from a general external disturbance. We adopt for the first time the active disturbance rejection control approach to stabilization of multi-dimensional partial differential equations under corrupted output feedback. In terms of this approach, the disturbance is estimated by a relatively independent estimator, based on (possibly) an infinite number of ordinary differential equations reduced from the original PDEs by infinitely many time-dependent test functions. This gives a state observer, an additional result via this approach. The disturbance is compensated in the feedback-loop. As a result, the control law can be designed almost as the same as that for the system without disturbance. We show that with a time varying gain properly designed, the observer driven by the disturbance estimator is convergent; and that all subsystems in the closed-loop are asymptotically stable. We also provide numerical simulations which demonstrate the convergence results and underline the effect of the time varying high gain estimator.