Elimination of thermal instability in precise positioning of Galfenol actuators

Mojtaba Ghodsi, Ashraf Saleem, Abdullah Özer, Issam Bahadur, Khurshid Alam, Amur Al-Yahmadi, Mohammad Hadi Ghodsi, Hamidreza Hoshyarmanesh, Mohammad Reza Sheykholeslami

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents a new method to eliminate deviation in positioning caused by coil's heat generation in magnetostrictive actuators. The advantages of the proposed system are compactness, high controllability and high reliability. The actuator package consists of Galfenol as active element and a magnification mechanism combined with a Peltier element or thermoelectric cooler (TEC). By using the temperature sensor, a thermoelectric cooler (TEC) is activated to reduce the temperature of the coil. However, the reduction of temperature by TEC alone is not enough to eliminate the error and controlling of applied voltage is also required. A simple PI controller for coil's current is combined with TEC and by reducing the temperature and current simultaneously, the positioning error is vanished completely.

Original languageEnglish
Title of host publicationBehavior and Mechanics of Multifunctional Materials and Composites 2016
PublisherSPIE
Volume9800
ISBN (Electronic)9781510600416
DOIs
Publication statusPublished - 2016
EventBehavior and Mechanics of Multifunctional Materials and Composites 2016 - Las Vegas, United States
Duration: Mar 21 2016Mar 23 2016

Other

OtherBehavior and Mechanics of Multifunctional Materials and Composites 2016
CountryUnited States
CityLas Vegas
Period3/21/163/23/16

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Keywords

  • Galfenol
  • Peltier element (TEC)
  • Precise positioning
  • Thermal instability

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Ghodsi, M., Saleem, A., Özer, A., Bahadur, I., Alam, K., Al-Yahmadi, A., Ghodsi, M. H., Hoshyarmanesh, H., & Sheykholeslami, M. R. (2016). Elimination of thermal instability in precise positioning of Galfenol actuators. In Behavior and Mechanics of Multifunctional Materials and Composites 2016 (Vol. 9800). [980008] SPIE. https://doi.org/10.1117/12.2222990