Design of a two degree-of-freedom, MRI-compatible actuator

Author

Elbannan, K.M. ; Salisbury, Shaun P.

Author_Institution

Dept. of Mech. & Mater. Eng., Univ. of Western Ontario, London, ON, Canada

fYear

2012

fDate

Aug. 28 2012-Sept. 1 2012

Firstpage

940

Lastpage

943

Abstract

A novel compact piezoworm actuator for the MRI (Magnetic Resonance Imaging) environment is presented which is capable of both linear and rotary motion. The actuator will be fabricated from beryllium copper for minimal image distortion. Complementary clamps are integrated to minimize the number of drive channels and to act as a brake in case of a malfunction. Analysis was employed to optimize the selection of the piezostacks and flexures depending on their functional requirements. The device is targeting a maximum speed of 5 mm/s, a force thrust of 9 N and 5 rpm of rotational speed.

Keywords

biomedical MRI; biomedical equipment; brakes; clamps; piezoelectric actuators; MRI environment; beryllium copper; brake; compact piezoworm actuator; complementary clamps; drive channels; flexures; force thrust; linear motion; magnetic resonance imaging; minimal image distortion; piezostacks; rotary motion; rotational speed; two degree-of-freedom MRI-compatible actuator; Actuators; Clamps; Force; Magnetic resonance imaging; Materials; Needles; Shafts; Humans; Magnetic Resonance Imaging;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society (EMBC), 2012 Annual International Conference of the IEEE

Conference_Location

San Diego, CA

ISSN

1557-170X

Print_ISBN

978-1-4244-4119-8

Electronic_ISBN

1557-170X

Type

conf

DOI

10.1109/EMBC.2012.6346087

Filename

6346087