A Novel Nonlinear Disturbance Observer Embedded Second-Order Finite Time Tracking-Based Controller for Robotic Manipulators

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Article number061005
Journal / PublicationJournal of Computing and Information Science in Engineering
Issue number6
Online published13 May 2021
Publication statusPublished - Dec 2021


Robotic manipulators are complex and dynamic nonlinear mechanical systems subject to numerous uncertainties, such as payload variations, frictions, and unmodeled dynamics. To mitigate the uncertainty caused by these disturbances and minimize the tracking errors of the controllers, this study proposed a finite time tracking-based controller (FTC) that embeds a (NDO) and a second-order sliding-mode modifier (SOSM). The NDO was incorporated to compensate for the system's global bounded uncertainty and the SOSM used a robust nonsingular terminal sliding-mode modifier to stabilize the controller. The theoretical analysis showed that the tracking error could quickly converge in finite time. Simulation on a typical robotics manipulator demonstrated the practical appeal of the proposed scheme.

Research Area(s)

  • Finite time tracking-based controller (ftc), Human computer interfaces/interactions, Manufacturing automation, Nonlinear disturbance observer (ndo), Robotic manipulator, Second-order sliding-mode modifier (sosm)

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