Geometrical amplification of SMA actuator displacement using externally actuated beam

Elwaleed Awad Khidir, Nik Abdullah Mohamed, Sallehuddin Mohamed Haris

Research output: Contribution to journalArticle

Abstract

A major deficiency of shape memory alloy (SMA) actuators is that their displacement is limited. This paper discusses the utilization of deflected flexible beams to amplify the displacement of a SMA actuator. The actuator is composed of a SMA wire fixed eccentrically along a flexible beam dividing it into equally spaced segments. A geometrical model based on the assumption that the geometry of the beam when subjected to bending can be approximated by an arc (part of a circle). The model is built to compute the beam end displacement and deflection upon heating the SMA wire for different number of segments and different eccentricities. The model has been experimentally verified and the results showed that the model is useful to predict the geometrical behavior of the actuator.

Original languageEnglish
Pages (from-to)92-100
Number of pages9
JournalSensors and Transducers
Volume144
Issue number9
Publication statusPublished - 2012

Fingerprint

Shape memory effect
Amplification
Actuators
Wire
Heating
Geometry

Keywords

  • Amplification
  • Beam
  • Shape memory alloy

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Control and Systems Engineering

Cite this

Geometrical amplification of SMA actuator displacement using externally actuated beam. / Khidir, Elwaleed Awad; Mohamed, Nik Abdullah; Mohamed Haris, Sallehuddin.

In: Sensors and Transducers, Vol. 144, No. 9, 2012, p. 92-100.

Research output: Contribution to journalArticle

Khidir, Elwaleed Awad ; Mohamed, Nik Abdullah ; Mohamed Haris, Sallehuddin. / Geometrical amplification of SMA actuator displacement using externally actuated beam. In: Sensors and Transducers. 2012 ; Vol. 144, No. 9. pp. 92-100.
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