A variable-resistance digital charge estimator for piezoelectric actuators: An alternative to maximise accuracy and curb voltage drop

Morteza Mohammadzaheri*, Mohammadreza Emadi, Mojtaba Ghodsi, Ehsan Jamshidi, Issam Bahadur, Ashraf Saleem, Musaab Zarog

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

This article (1) proposes the use of a varying sensing resistor for digital charge estimators of piezoelectric actuators, (2) shows the usefulness of this proposal and (3) derives formulae to estimate the proposed varying sensing resistor. Digital charge estimators are used for charge-based precise position control of piezoelectric actuators. In existing digital charge estimators, an uncalculated resistor is used for a wide range of operating areas. Improper choice of the sensing resistor causes excessive drop in accuracy of charge estimation and/or in the driver voltage across the actuator. These issues are shown to nearly vanish with the use of proposed varying resistors.

Original languageEnglish
Pages (from-to)1699-1705
Number of pages7
JournalJournal of Intelligent Material Systems and Structures
Volume30
Issue number11
DOIs
Publication statusPublished - Jul 1 2019

Keywords

  • charge
  • digital
  • Piezoelectric actuator
  • voltage drop

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanical Engineering

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