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Active Control of Flexible Structures Submitted to Incompressible Flows

[+] Author Affiliations
C. C. Machado, A. L. De Bortoli

UFRGS-PPGMAp, Porto Alegre, RS, Brazil

S. C. P. Gomes

FURG-DMAT, Rio Grande, RS, Brazil

Paper No. IMECE2002-33624, pp. 559-564; 6 pages
doi:10.1115/IMECE2002-33624
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

This work presents a survey on the control law development to actively attenuate the vibrations of a flexible structure submitted to fluid flow. Firstly, a robust controller with LQG/LTR approach was developed. Numerical tests were carried out being robustness characteristics to flow induced vibration and to noise rejection verified, for the case of equal nominal and real plants. The same robustness was not verified, when parametric variations were introduced. Therefore, another controller, based on regulator and filter pole placement approach, was developed where the direct loop obeys stability and performance robustness criterions, allowing to obtain good numerical results, even in the presence of significant parametric variations.

Copyright © 2002 by ASME

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