A digital charge amplifier for hysteresis elimination in piezoelectric actuators

Mohsen Bazghaleh; Steven Grainger; Morteza Mohammadzaheri; Ben Cazzolato; Tien-Fu Lu

doi:10.1088/0964-1726/22/7/075016

A digital charge amplifier for hysteresis elimination in piezoelectric actuators

Mohsen Bazghaleh, Steven Grainger, Morteza Mohammadzaheri, Ben Cazzolato, Tien-Fu Lu

School of Engineering & Physical Sciences

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

Piezoelectric actuators are commonly used for nanopositioning due to their high resolution, low power consumption and wide operating frequency, but they suffer hysteresis, which affects linearity. In this paper, a novel digital charge amplifier is presented. Results show that hysteresis is reduced by 91% compared with a voltage amplifier, but over long operational periods the digital charge amplifier approach suffers displacement drift. A non-linear ARX model with long-term accuracy is used with a data fusion algorithm to remove the drift. Experimental results are presented.

Original language	English
Article number	075016
Journal	Smart Materials and Structures
Volume	22
Issue number	7
DOIs	https://doi.org/10.1088/0964-1726/22/7/075016
Publication status	Published - 6 Jun 2013

ASJC Scopus subject areas

Signal Processing
Civil and Structural Engineering
Atomic and Molecular Physics, and Optics
General Materials Science
Condensed Matter Physics
Mechanics of Materials
Electrical and Electronic Engineering

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10.1088/0964-1726/22/7/075016

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AB - Piezoelectric actuators are commonly used for nanopositioning due to their high resolution, low power consumption and wide operating frequency, but they suffer hysteresis, which affects linearity. In this paper, a novel digital charge amplifier is presented. Results show that hysteresis is reduced by 91% compared with a voltage amplifier, but over long operational periods the digital charge amplifier approach suffers displacement drift. A non-linear ARX model with long-term accuracy is used with a data fusion algorithm to remove the drift. Experimental results are presented.

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A digital charge amplifier for hysteresis elimination in piezoelectric actuators

Abstract

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