Adaptive control allocation

  • Authors:
  • Johannes Tjønnås;Tor A. Johansen

  • Affiliations:
  • Department of Engineering Cybernetics, Norwegian University of Science and Technology, Trondheim, Norway;Department of Engineering Cybernetics, Norwegian University of Science and Technology, Trondheim, Norway

  • Venue:
  • Automatica (Journal of IFAC)
  • Year:
  • 2008

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Abstract

In this work we address the control allocation problem for a nonlinear over-actuated time-varying system where parameters affine in the effector model may be assumed unknown. Instead of optimizing the control allocation at each time instant, a dynamic approach is considered by constructing update-laws that represent asymptotically optimal allocation search and adaptation. Using Lyapunov analysis for cascaded set-stable systems, uniform global/local asymptotic stability is guaranteed for the sets described by the system, the optimal allocation update-law and the adaptive update-law.