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Related Experiment Videos

Smart panels with velocity feedback control systems using triangularly shaped strain actuators.

Paolo Gardonio1, Stephen J Elliott

  • 1Institute of Sound and Vibration Research, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom.

The Journal of the Acoustical Society of America
|May 19, 2005
PubMed
Summary
This summary is machine-generated.

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A new smart panel design with triangular piezoelectric actuators offers superior active structural acoustic control. This innovative "active wedge" system effectively reduces panel vibration and sound radiation at low frequencies.

Area of Science:

  • Structural Acoustics
  • Smart Materials
  • Control Systems Engineering

Background:

  • Conventional smart panels use square piezoelectric actuators for active structural acoustic control.
  • Existing systems analyze decentralized or direct velocity feedback control architectures.
  • Low-frequency resonances in panels contribute to unwanted vibration and sound radiation.

Purpose of the Study:

  • To theoretically study and compare a novel smart panel design with triangular piezoelectric actuators against a conventional design.
  • To assess the control effectiveness and stability of different feedback control architectures for both panel types.
  • To evaluate the potential of the new design to reduce structural response and sound radiation.

Main Methods:

  • Theoretical analysis of active structural acoustic control for two smart panel configurations.

Related Experiment Videos

  • Implementation of MIMO decentralized and SISO direct velocity feedback control.
  • Performance assessment focusing on active damping of low-frequency resonances.
  • Comparison of triangular actuator arrangement versus a 4x4 array of square actuators.

    • Main Results:

    • The novel smart panel with triangular actuators demonstrates enhanced control performance compared to the conventional square actuator system.
    • The triangular actuator arrangement effectively acts as 'active wedges,' absorbing flexural wave energy at panel borders.
    • Both systems achieve active damping, reducing response and sound radiation in low-frequency resonances.

    Conclusions:

    • The proposed smart panel with triangular piezoelectric actuators provides superior active structural acoustic control.
    • This design offers a promising approach for creating anechoic panels by minimizing sound radiation.
    • The 'active wedge' concept effectively mitigates structural vibrations and acoustic emissions.