Implementation and analysis of an innovative digital charge amplifier for hysteresis reduction in piezoelectric stack actuators

Mohsen Bazghaleh, Steven Grainger, Ben Cazzolato, Lu Tien-Fu, Reza Hashemi Oskouei

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    Smart actuators are the key components in a variety of nanopositioning applications, such as scanning probe microscopes and atomic force microscopes. Piezoelectric actuators are the most common smart actuators due to their high resolution, low power consumption, and wide operating frequency but they suffer hysteresis which affects linearity. In this paper, an innovative digital charge amplifier is presented to reduce hysteresis in piezoelectric stack actuators. Compared to traditional analog charge drives, experimental results show that the piezoelectric stack actuator driven by the digital charge amplifier has less hysteresis. It is also shown that the voltage drop of the digital charge amplifier is significantly less than the voltage drop of conventional analog charge amplifiers.

    Original languageEnglish
    Article number045005
    Pages (from-to)Article: 045005
    Number of pages6
    JournalReview of Scientific Instruments
    Volume85
    Issue number4
    DOIs
    Publication statusPublished - 2014

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