A sensorless angular displacement measurement method for rotational oscillation generation in biomedical applications with Ros-Drill©

Handan Nak, Ali Fuat Ergenc*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

This paper presents a novel measurement method for angular displacement of an oscillation-assisted micro drill device, Ros-Drill©. The device is driven with a brushless dc motor (BLDC) which is desired to track a sinusoidal position reference. The measurement method is based on the principle of monitoring the back-emf voltage that is induced on the non-fed winding of the brushless motor. It offers sensorless analog measurement of the angular displacement of the oscillatory motion which is not possible with optical encoders. The measurement methodology and control algorithms are implemented utilizing a digital signal processor. Experiments reveal that the method is feasible for measuring angular displacements of rotational oscillations during cellular piercing operations. Furthermore, it presents fair performance for frequencies up to 1000 Hz and provides early diagnosis for a potential malfunction of the micro drill.

Original languageEnglish
Pages (from-to)1774-1785
Number of pages12
JournalTransactions of the Institute of Measurement and Control
Volume43
Issue number8
DOIs
Publication statusPublished - May 2021

Bibliographical note

Publisher Copyright:
© The Author(s) 2020.

Funding

This work was supported by the Scientific and Technological Research Council of Turkey (TUBITAK) with the project number 115S546.

FundersFunder number
TUBITAK115S546
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu

    Keywords

    • BLDC
    • micro drill
    • microinjection
    • Rotational oscillations
    • sensorless angular displacement measurement

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