articleIEEE Transactions on CyberneticsMar 18, 2020Closed access

Observer-Based Adaptive Fuzzy Tracking Control for Strict-Feedback Nonlinear Systems With Unknown Control Gain Functions

STShaocheng TongXMXiao MinYLYuan‐Xin Li

Liaoning University of Technology · Dalian Maritime University

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Abstract

This article investigates the adaptive fuzzy output-feedback backstepping control design problem for uncertain strict-feedback nonlinear systems in the presence of unknown virtual and actual control gain functions and unmeasurable states. A fuzzy state observer is designed via fuzzy-logic systems, thus the unmeasurable states are estimated based on the designed fuzzy state observer. By constructing the logarithm Lyapunov functions and incorporating the property of the fuzzy basis functions and bounded control design technique into the adaptive backstepping recursive design, a novel observer-based adaptive fuzzy output-feedback control method is developed. The proposed fuzzy adaptive output-feedback…

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Topics & keywords

Topics
Keywords
  • Backstepping
  • Control theory (sociology)
  • Fuzzy logic
  • Observer (physics)
  • Fuzzy control system
  • Bounded function
  • Adaptive control
  • Nonlinear system
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