Acceleration of finite-time stable homogeneous systems

Y. Dvir, A. Levant, D. Efimov, A. Polyakov, W. Perruquetti

Research output: Contribution to journalArticlepeer-review

Abstract

Stabilization rates of power-integrator chains are easily regulated. It provides a framework for acceleration of uncertain multiple-input–multiple-output dynamic systems of known relative degrees (RDs). The desired rate of the output stabilization (sliding-mode control) is ensured for an uncertain system if its RD is known, and a rough approximation of the high-frequency gain matrix is available. The uniformly bounded convergence time (fixed-time stability) is obtained as a particular case. The control can be kept continuous everywhere except the sliding-mode set if the partial RDs are equal. Similarly, uncertain smooth systems of complete multiple-input–multiple-output RDs (ie, lacking zero dynamics) are stabilized by continuous control at their equilibria in finite time and are accelerated. Output-feedback controllers are constructed. Computer simulation demonstrates the efficiency of the proposed approach.

Original languageEnglish
Pages (from-to)1757-1777
Number of pages21
JournalInternational Journal of Robust and Nonlinear Control
Volume28
Issue number5
DOIs
StatePublished - 25 Mar 2018

Keywords

  • finite-time stability
  • homogeneous systems
  • sliding-mode control
  • uncertain systems

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