Adaptive charge estimation of piezoelectric actuators, a radial basis function approach

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Experiments have shown charge of a piezoelectric actuator is proportional to its displacement for an extensive area of operating. As a result, accurate estimation of charge can be an equivalent of displacement/position estimation for piezoelectric actuators, a key advancement towards precise sensorless nanopositioning. As a drawback, existing charge estimation methods take a significant portion of the excitation voltage, i.e. voltage drop. Digital charge estimation have been shown, in the literature, to have the least voltage drop compared to other methods. Digital charge estimators have only one analogue element, a sensing resistor. This paper initially investigates digital charge estimators of piezoelectric actuators to extract an aptness criterion to (i) maximise the accuracy and (ii) minimise the voltage drop. Experiments show that estimators with a constant sensing resistance cannot satisfy the aptness criterion at different operating conditions; while, all existing digital charge estimators use one or, exceptionally, a few intuitive uncalculated sensing resistances. That is, existing estimators witness evitable inaccuracy and/or unnecessarily high voltage drop. This research tackles this defect through development of adaptive charge estimators with varying resistors, which fulfil the aptness criterion in the entire operating area.

Original languageEnglish
Title of host publicationProceedings of the 2019 20th International Conference on Research and Education in Mechatronics, REM 2019
EditorsPeter Hehenberger
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538692578
DOIs
Publication statusPublished - May 2019
Event20th International Conference on Research and Education in Mechatronics, REM 2019 - Wels, Austria
Duration: May 23 2019May 24 2019

Publication series

NameProceedings of the 2019 20th International Conference on Research and Education in Mechatronics, REM 2019

Conference

Conference20th International Conference on Research and Education in Mechatronics, REM 2019
Country/TerritoryAustria
CityWels
Period5/23/195/24/19

Keywords

  • Charge
  • Digital
  • Piezoelectric Actuator
  • Radial Basis Function Network
  • Voltage Drop

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Education
  • Electrical and Electronic Engineering
  • Mechanical Engineering

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