Active damping of dynamical structures using piezo self sensing

Bas Jansen (Corresponding author), Hans Butler (Corresponding author), Ruben Di Filippo (Corresponding author)

Research output: Contribution to journalConference articlepeer-review

Abstract

Piezo actuators are widely used in high-precision equipment where accurate nanometer positioning is required. Piezo material, like PZT, show significant hysteretic behaviour, typically needing position feedback control or solutions like charge amplification to minimize hysteresis effects. Other materials like LiNbO3 show linear behaviour themselves. Both, however, have an inherent high stiffness and lightly damped mechanical resonances leading to unwanted vibration. This paper investigates the use of self sensing in piezo's, using current and voltage in the electrical domain, for active damping purposes. In particular, the combination with charge control is shown, and a hysteresis cancellation technique is proposed.

Original languageEnglish
Pages (from-to)543-548
Number of pages6
JournalIFAC-PapersOnLine
Volume52
Issue number15
DOIs
Publication statusPublished - Sep 2019
Event8th IFAC Symposium on Mechatronic Systems, MECHATRONICS 2019 - Vienna, Austria
Duration: 4 Sep 20196 Sep 2019

Keywords

  • Active damping
  • LiNbO
  • Piezo
  • PZT
  • Self-sensing

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