A Comparative Quantification of Existing Creep Models for Piezoactuators

Shabnam Tashakori* (Corresponding Author), Vahid Vaziri, Sumeet S. Aphale

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingPublished conference contribution


Piezoactuators are popularly employed in precise positioning applications at the micro- and nanometer scales. Their positioning performance, especially for low-frequency responses, is significantly impacted by creep - a phenomenon where the actuator deformation gradually changes in the presence of a persistently applied constant voltage. This change in deformation manifests itself in the gradual drifting of the end-effector position that the piezoactuator is driving. A significant research effort has therefore focussed on the accurate modelling of creep. This paper compares three popularly employed creep models against experimentally measured creep data obtained from a piezo-drive nanopositioner axis and quantifies their modelling accuracy. The quantification demonstrates that the fractional-order model (double logarithmic model) outperforms the other two integer-order models (Logarithmic and LTI models) along multiple, key performance indices.
Original languageEnglish
Title of host publicationRecent Trends in Wave Mechanics and Vibrations. WMVC 2022. Mechanisms and Machine Science
EditorsZ. Dimitrovová, P. Biswas, R. Gonçalves, T. Silva
Number of pages8
ISBN (Electronic)978-3-031-15758-5
ISBN (Print)978-3-031-15757-8
Publication statusPublished - 7 Oct 2022
EventWMVC 2022: 10th International Conference on Wave Mechanics and Vibrations - Lisbon, Portugal
Duration: 4 Jul 20226 Jul 2022
Conference number: 10th

Publication series

NameMechanisms and Machine Science
ISSN (Print)2211-0984
ISSN (Electronic)2211-0992


ConferenceWMVC 2022
Abbreviated titleWMVC 2022
Internet address


  • Creep dynamics
  • Nanopositioning
  • Piezoelectric actuator
  • Fractional-order modelling


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