Fuzzy adaptive observer backstepping control for MIMO nonlinear systems

  • Authors:
  • Tong Shaocheng;Li Changying;Li Yongming

  • Affiliations:
  • Department of Basic Mathematics, Liaoning University of Technology, Jinzhou 121001, China;Department of Basic Mathematics, Liaoning University of Technology, Jinzhou 121001, China;Department of Basic Mathematics, Liaoning University of Technology, Jinzhou 121001, China

  • Venue:
  • Fuzzy Sets and Systems
  • Year:
  • 2009

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Abstract

In this paper, a fuzzy adaptive backstepping output feedback control approach is developed for a class of multi-input and multi-output (MIMO) nonlinear systems with unmeasured states. Using fuzzy logic systems to approximate the unknown nonlinear functions, a fuzzy adaptive observer is designed for state estimation as well as system identification. Combining with the backstepping design techniques, a fuzzy adaptive output feedback control is constructed recursively. It is proved that the proposed fuzzy adaptive control approach can guarantee the semi-global uniform ultimate boundedness for all the signals and the tracking error to a small neighborhood of the origin. Simulation studies illustrate the effectiveness of the proposed approach.