Adaptive second-order sliding mode control with uncertainty compensation

G. Bartolini, A. Levant, A. Pisano*, E. Usai

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

47 Scopus citations

Abstract

This paper endows the second-order sliding mode control (2-SMC) approach with additional capabilities of learning and control adaptation. We present a 2-SMC scheme that estimates and compensates for the uncertainties affecting the system dynamics. It also adjusts the discontinuous control effort online, so that it can be reduced to arbitrarily small values. The proposed scheme is particularly useful when the available information regarding the uncertainties is conservative, and the classical `fixed-gain’ SMC would inevitably lead to largely oversized discontinuous control effort. Benefits from the viewpoint of chattering reduction are obtained, as confirmed by computer simulations.

Original languageEnglish
Pages (from-to)1747-1758
Number of pages12
JournalInternational Journal of Control
Volume89
Issue number9
DOIs
StatePublished - 1 Sep 2016

Keywords

  • Second-order sliding modes
  • adaptation
  • nonlinear systems
  • uncertain systems

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