Reset control performance improvement using fractional derivatives

Duarte Valério*, Niranjan Saikumar, Ali Ahmadi Dastjerdi, Nima Karbasizadeh, S. Hassan Hosseinnia*

*Corresponding author for this work

Research output: Contribution to journalConference articleScientificpeer-review

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Abstract

When a linear controller is replaced by a reset controller, it is possible to keep the gain behaviour essentially the same, while improving the phase behaviour. However, because reset control is nonlinear, higher order harmonics appear, which may deteriorate the results. In this paper, reset controllers are combined with fractional derivatives, decreasing the magnitude of higher order harmonics. In this way, better results are found in simulations of a Clegg integrator, of a FORE (first order reset element), and of a CgLp (constant in gain lead in phase) controller. The reason why better results are found is explained.
Original languageEnglish
Pages (from-to)243-248
Number of pages6
JournalIFAC-PapersOnline
Volume58
Issue number12
DOIs
Publication statusPublished - 2024
Event12th IFAC Conference on Fractional Differentiation and its Applications ICFDA 2024 - Bordeaux, France
Duration: 9 Jul 202412 Jul 2024

Keywords

  • Clegg integrator
  • Describing function
  • Discontinuous control
  • Fractional-order systems
  • Reset control

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