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Adaptive Actuator Failure Compensation for a Class of Nonlinear Systems with Unknown Control Direction

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Abstract

In this note, a novel adaptive compensation control scheme is proposed for a class of nonlinear systems with unknown control direction and a possibly infinite number of unknown actuator failures. By introducing a bound estimation approach, high-order Lyapunov functions and a Nussbaum function with faster growth rate, the obstacle caused by unknown failures and unknown control direction is successfully circumvented and all signals of the closed-loop system are proved to be globally uniformly bounded. Moreover, the proposed scheme is able to steer the tracking error into a predefined small residue set. Simulation results are presented to illustrate the effectiveness of the proposed scheme.

Original languageEnglish
Article number7397932
Pages (from-to)385-392
Number of pages8
JournalIEEE Transactions on Automatic Control
Volume62
Issue number1
DOIs
StatePublished - Jan 2017

Keywords

  • Actuator failures
  • adaptive control
  • nonlinear systems
  • unknown control direction

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