Improved Nonlinear Extended Observer Based Adaptive Fuzzy Output Feedback Control for a Class of Uncertain Nonlinear Systems With Unknown Input Hysteresis
Journal article, 2023

This study focuses on the problem of adaptive fuzzy dynamic surface output feedback control for a class of uncertain nonlinear systems subjected to unknown input hysteresis. A Prandtl-Ishlinskii (PI) model is applied to the uncertain nonlinear system for describing the unknown input hysteresis, making the controller design feasible. In addition, a nonlinear extended state observer (NESO) is designed for simultaneously estimating the unmeasurable states and generalized disturbances, including the nonlinear hysteresis term of the PI model and external disturbances. In addition, a novel nonlinear function is designed to replace fal(ยท) function of the general NESO to address a modification that increases the convergence speed. Considering the incorporation of the improved nonlinear extended state observer (INESO), an adaptive output feedback control scheme is proposed based on fuzzy logic system and dynamic surface techniques. A command filter is employed to avoid the 'explosion of complexity' problem inherent in the backstepping technique, while compensating the filtering error caused by adopting the filter. The Lyapunov approach is used to demonstrate the stability of the entire closed-loop system. Experiments regarding a piezoelectric micropositioning stage are conducted, the results of which illustrate that the proposed adaptive fuzzy output feedback control method can guarantee a satisfactory tracking performance.

Prandtl-Ishlinskii model

extended state observer

hysteresis nonlinearity

fuzzy logic system

Dynamic surface control

Author

Linlin Nie

Jilin University

Miaolei Zhou

Jilin University

Wenjing Cao

Sophia University

Xiaoliang Huang

Chalmers, Electrical Engineering, Electric Power Engineering

Volvo

IEEE Transactions on Fuzzy Systems

1063-6706 (ISSN) 19410034 (eISSN)

Vol. 31 10 3679-3689

Subject Categories

Control Engineering

DOI

10.1109/TFUZZ.2023.3267549

More information

Latest update

11/6/2023