Adaptive Continuous Barrier Function Terminal Sliding Mode Control Technique for Disturbed Robotic Manipulator

Journal article

Authors/Editors

WUDHICHAI ASSAWINCHAICHOTE

Strategic Research Themes

Other (Strategic Research Themes)

Publication Details

Author list: Mobayen S., Alattas K.A., Assawinchaichote W.

Publisher: Institute of Electrical and Electronics Engineers

Publication year: 2021

Journal: IEEE Transactions on Circuits and Systems I: Regular Papers (1549-8328)

Volume number: 68

Issue number: 10

Start page: 4403

End page: 4412

Number of pages: 10

ISSN: 1549-8328

eISSN: 1558-0806

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85116197590&doi=10.1109%2fTCSI.2021.3101736&partnerID=40&md5=715c40894691df49a14f50770adcadcb

Languages: English-Great Britain (EN-GB)

View in Web of Science | View on publisher site | View citing articles in Web of Science

Abstract

This paper offers an improved finite time sliding mode controller scheme for a class of robotic manipulators with external disturbances. Since conventional sliding mode controllers have a discontinuous signum function, an important problem called chattering phenomenon can occur in them. The proposed scheme presents a new Lyapunov candidate functional containing an absolute function based on a fractional power of the switching surface such that the designed control law is continuous and smooth. The recommended control technique is designed using the Lyapunov stability theory and satisfies the presence of the sliding mode around designed switching surface in the finite time. The presented method eliminates the chattering problem produced by the switching controller and satisfies high precision action. Besides, the adaptive tuning controllers are designed to approximate the unknown bound of external disturbance. An extension of the proposed control technique based on the barrier function adaptive terminal sliding mode control is also suggested for better performance and robust tracking control of the nonlinear systems with external disturbances. Some simulation and experimental outcomes exhibit the efficacy of the planned technique. © 2004-2012 IEEE.

Keywords

chattering phenomenon, continuous sliding mode control, finite time convergence, second-order dynamics