Robust adaptive control of a class of nonlinear systems with unknown dead-zone

  • Authors:
  • Xing-Song Wang;Chun-Yi Su;Henry Hong

  • Affiliations:
  • Department of Mechanical Engineering, Southeast University, Nanjing 210096, PR China;Department of Mechanical Engineering, Concordia University, Montreal, Que., Canada H3G 1M8;Department of Mechanical Engineering, Concordia University, Montreal, Que., Canada H3G 1M8

  • Venue:
  • Automatica (Journal of IFAC)
  • Year:
  • 2004

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Abstract

This paper deals with the adaptive control of a class of continuous-time nonlinear dynamic systems preceded by an unknown dead-zone. By using a new description of a dead-zone and by exploring the properties of this dead-zone model intuitively and mathematically, a robust adaptive control scheme is developed without constructing the dead-zone inverse. The new control scheme ensures global stability of the adaptive system and achieves desired tracking precision. Simulations performed on a typical nonlinear system illustrate and clarify the validity of this approach.