Nonlinear Optimal Control of Plate Structures Using Magnetostrictive Actuators

Abstract

A nonlinear optimal control method is developed for magnetostrictive actuators used to actively attenuate plate vibration. Significant improvements in vibration control can be achieved when the magnetostrictive actuators are driven at moderate to high levels. This results in nonlinearity and hysteresis which cannot be effectively compensated using linear control theory. This issue is address by introducing a homogenized energy model that accounts for nonlinear, hysteretic constitutive behavior into the control design. Numerical examples illustrate significant improvements in vibration attenuation when the nonlinear control method is implemented.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2005
Accession Number
ADA443741

Entities

People

  • Ralph C. Smith
  • William S Oates

Organizations

  • North Carolina State University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Actuators
  • Boundary Value Problems
  • Control Systems
  • Displacement
  • Domain Walls
  • Energy
  • Equations
  • Feedback
  • Free Energy
  • Geometry
  • Hysteresis
  • Magnetic Fields
  • Magnetization
  • Materials
  • Modulus Of Elasticity
  • Nonlinear Dynamics
  • Transducers

Fields of Study

  • Engineering

Readers

  • Control Systems Engineering.
  • Structural Dynamics.
  • Systems Analysis and Design