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Published December 9, 2022 | Version 1
Conference paper Open

Frequency Domain Identification of Multirate Systems: A Lifted Local Polynomial Modeling Approach

  • 1. Eindhoven University of Technology
  • 2. Sioux Technologies


Frequency-domain representations of multirate systems are essential for controller design and performance evaluation of multirate systems and sampled-data control. The aim of this paper is to develop a time-efficient closed-loop identification approach for multirate systems in the frequency-domain. The developed method utilizes local polynomial modeling for lifted representations of LPTV systems, which enables direct identification of closed-loop multirate systems in a single identification experiment. Unlike LTI identification techniques, the developed method does not suffer from bias due to ignored LPTV dynamics. The developed approach is demonstrated on a multirate example, resulting in accurate and fast identification in the frequency domain.



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IMOCO4.E – Intelligent Motion Control under Industry 4.E 101007311
European Commission