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Aeroelastic structural acoustic control

R L Clark1, K D Frampton

  • 1Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708-0300, USA.

The Journal of the Acoustical Society of America
|February 11, 1999
PubMed
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Static output-feedback controllers effectively enhance transmission loss in panels with mean flow. This control method achieves performance comparable to full state-feedback, even with practical effort limitations.

Area of Science:

  • Acoustic engineering
  • Control systems engineering
  • Fluid-structure interaction

Background:

  • Increasing transmission loss in panels is crucial for noise control.
  • Mean flow and acoustic fields complicate panel vibration and sound transmission.
  • Output-feedback control offers a potential solution for active noise reduction.

Purpose of the Study:

  • To design and evaluate static, constant-gain, output-feedback control compensators.
  • To enhance the transmission loss of a panel exposed to mean flow.
  • To compare the performance of output-feedback control with full state-feedback control.

Main Methods:

  • Design of multi-input, multi-output control systems using colocated transducer pairs.
  • Implementation of static-gain, output-feedback controllers.

Related Experiment Videos

  • Comparison of controller performance against full state-feedback controllers.
  • Analysis of controller dissipativity and robustness to aeroelastic coupling.

    • Main Results:

    • Static output-feedback controllers achieved performance comparable to full state-feedback controllers under practical control effort limitations.
    • The designed static compensators were dissipative, ensuring stability.
    • Controller design showed minimal variation with aeroelastic coupling under subsonic flow.
    • Parametric studies investigated the impact of control effort penalty and transducer array size.

    Conclusions:

    • Static, constant-gain, output-feedback control is a viable and effective strategy for enhancing panel transmission loss.
    • The proposed control approach offers a practical solution for noise reduction in structures with mean flow.
    • The dissipative nature of the controllers ensures robust performance across varying flow conditions.