Modeling and Adaptive Control of Magnetostrictive Actuators

Abstract

In this dissertation, we propose a model and formulate a control methodology for a thin magnetostrictive rod actuator. The goal is to obtain a bulk, low dimensional model that can be used for real-time control purposes. Previous and concurrent research in the modeling of magnetostrictive actuators and the related area of electrostrictive actuators have produced models that are of low order and reproduce their quasi-static response reasonably well. But the main interest in using these and other smart actuators is at a high frequency - for producing large displacements with mechanical rectification, producing sonar signals etc. The well known limitation of smart actuators that are based on electro-magnetothermo-elastic behaviors of smart materials is the complex, input-rate dependent, hysteretic behavior of the latter.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1999
Accession Number
ADA439896

Entities

People

  • Ramakrishnan Venkataraman

Organizations

  • Harvard University

Tags

Communities of Interest

  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Actuators
  • Banach Space
  • Closed Loop Systems
  • Computational Science
  • Control Systems
  • Differential Equations
  • Domain Walls
  • Equations Of State
  • Ferromagnetic Materials
  • Magnetic Fields
  • Magnetic Flux Density
  • Phase Transformations
  • Point Theorem
  • Theorems
  • Time Intervals
  • Two Dimensional
  • Vector Spaces

Readers

  • Materials Science and Engineering.
  • Robotics and Automation.