Two-sensor control in active vibration isolation using hard mounts

Michiel A. Beijen*, Dirk Tjepkema, Johannes van Dijk

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    16 Citations (Scopus)

    Abstract

    To isolate precision machines from floor vibrations, active vibration isolators are often applied. In this paper, a two-sensor control strategy, based on acceleration feedback and force feedback, is proposed for an active vibration isolator using a single-axis active hard mount. The hard mount provides a stiff support while an active control system is used to get the desired isolation performance. In our previous work, we showed that a sensor fusion control strategy for active hard mounts can be used to realize three performance objectives simultaneously: providing isolation from floor vibrations, achieving a low sensitivity for direct disturbance forces, and adding damping to internal modes of the supported precision machine. In the present work, an enhanced control strategy is presented, referred to as two-sensor control. We will show that two-sensor control outperforms sensor fusion, because it has more possibilities for loop-shaping and has better stability properties. The two-sensor control strategy is successfully validated on an experimental setup.

    Original languageEnglish
    Pages (from-to)82-90
    Number of pages9
    JournalControl engineering practice
    Volume26
    Issue number1
    DOIs
    Publication statusPublished - May 2014

    Keywords

    • Active vibration isolation
    • Hard mount
    • Two-sensor control
    • Vibration control

    Cite this