Dynamics and Control of Nonlinear Fluid-Structure Interaction

Abstract

Experimental and theoretical studies of the nonlinear dynamics and control of aeroelastic systems including airfoils and wings have been conducted. Nonlinear geometric stiffness and freeplay have been considered specifically and good theoretical / experimental correlation obtained. Active control systems have been designed, built and tested to increase flutter speed and reduce limit cycle oscillations (LCO). Our most recent work includes theoretical studies of aerodynamic nonlinearities in the transonic range and their effect on flutter and LCO.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 2003
Accession Number
ADA418098

Entities

People

  • Earl H. Dowell
  • Lawrence N. Virgin
  • Robert L. Clark Jr.

Organizations

  • Duke University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Aircrafts
  • Control Surfaces
  • Control Systems
  • Delta Wings
  • Dynamics
  • Engineering
  • Flow
  • Materials
  • Materials Science
  • Mechanical Engineering
  • Nonlinear Dynamics
  • Nonlinear Systems
  • Oscillation
  • Stiffness
  • Unsteady Aerodynamics
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.
  • Control Systems Engineering.