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Time Delay Aeroelastic Feedback Control of 2-D Lifting Surfaces

[+] Author Affiliations
Liviu Librescu, Piergiovanni Marzocca

Virginia Polytechnic Institute and State University, Blacksburg, VA

Walter A. Silva

NASA Langley Research Center, Hampton, VA

Paper No. IMECE2002-32971, pp. 39-50; 12 pages
doi:10.1115/IMECE2002-32971
From:
  • ASME 2002 International Mechanical Engineering Congress and Exposition
  • 5th International Symposium on Fluid Structure Interaction, Aeroelasticity, and Flow Induced Vibration and Noise
  • New Orleans, Louisiana, USA, November 17–22, 2002
  • Conference Sponsors: Applied Mechanics Division
  • ISBN: 0-7918-3659-2 | eISBN: 0-7918-1691-5, 0-7918-1692-3, 0-7918-1693-1
  • Copyright © 2002 by ASME

abstract

Two basic issues related to the open/closed loop aeroelasticity of 2-D lifting surfaces in an incompressible flow field are considered in this paper. These concern the subcritical aeroelastic response to external time-dependent excitations, and the flutter instability of actively controlled airfoils involving a delayed feedback control. Results and comparisons regarding the flutter instability obtained via the first Volterra kernel in conjunction with a frequency eigenvalue analysis are presented. In the same context, the implications of the presence of time delays in the feedback control on the instability boundary and aeroelastic response are investigated and pertinent conclusions are supplied.

Copyright © 2002 by ASME
Topics: Delays , Feedback

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