A smooth model for periodically switched descriptor systems

Elisa Mostacciuolo, Stephan Trenn*, Francesco Vasca

*Corresponding author for this work

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Abstract

Switched descriptor systems characterized by a repetitive finite sequence of modes can exhibit state discontinuities at the switching time instants. The amplitudes of these discontinuities depend on the consistency projectors of the modes. A switched ordinary differential equations model whose continuous state evolution approximates the state of the original system is proposed. Sufficient conditions based on linear matrix inequalities on the modes projectors ensure that the approximation error is of linear order of the switching period. The theoretical findings are applied to a switched capacitor circuit and numerical results illustrate the practical usefulness of the proposed model.

Original languageEnglish
Article number110082
Number of pages8
JournalAutomatica
Volume136
DOIs
Publication statusPublished - Feb-2022

Keywords

  • Descriptor systems
  • Differential algebraic equations
  • Linear/nonlinear models
  • Non-smooth and discontinuous problems
  • Power electronics
  • Switched systems

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