Open AccessFault-tolerant control for a class of n-order systems based on fast terminal sliding mode and extended state observer
Author(s) -
Pu Yang,
Peng Liu,
ChenWan Wen,
Huilin Geng
Publication year - 2021
Publication title -
measurement + control/measurement and control
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.286
H-Index - 21
eISSN - 2051-8730
pISSN - 0020-2940
DOI - 10.1177/00202940211028613
Subject(s) - control theory (sociology) , terminal sliding mode , state observer , observer (physics) , sliding mode control , convergence (economics) , nonlinear system , actuator , lyapunov function , lyapunov stability , fault (geology) , computer science , mode (computer interface) , mathematics , control (management) , physics , economics , economic growth , operating system , quantum mechanics , artificial intelligence , seismology , geology
This paper focuses on fast terminal sliding mode fault-tolerant control for a class of n-order nonlinear systems. Firstly, when the actuator fault occurs, the extended state observer (ESO) is used to estimate the lumped uncertainty and its derivative of the system, so that the fault boundary is not needed to know. The convergence of ESO is proved theoretically. Secondly, a new type of fast terminal sliding surface is designed to achieve global fast convergence, non-singular control law and chattering reduction, and the Lyapunov stability criterion is used to prove that the system states converge to the origin of the sliding mode surface in finite time, which ensures the stability of the closed-loop system. Finally, the effectiveness and superiority of the proposed algorithm are verified by two simulation experiments of different order systems.