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Related Experiment Videos

Active vibration control using an inertial actuator with internal damping.

Christoph Paulitsch1, Paolo Gardonio, Stephen J Elliott

  • 1Institute of Sound and Vibration Research, University of Southampton, Highfield, Southampton, S017 1BJ, United Kingdom. cpaulits@gmx.de

The Journal of the Acoustical Society of America
|April 29, 2006
PubMed
Summary

Active damping using inertial actuators can cause instability. This study introduces internal relative velocity feedback to stabilize inertial actuators, optimizing gains for maximum vibration reduction in structures.

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Area of Science:

  • Structural dynamics
  • Control systems engineering
  • Vibration control

Background:

  • Direct velocity feedback with ideal actuators provides active damping.
  • Inertial actuators can introduce instability due to phase lag from resonant modes.

Purpose of the Study:

  • To investigate stabilization of lightweight, electrodynamic, inertial actuators.
  • To explore the use of relative velocity feedback for internal damping.
  • To determine optimal feedback gains for vibration reduction.

Main Methods:

  • Implemented an inner velocity feedback loop using a relative velocity sensor.
  • Simulated a model with the actuator on a clamped plate.
  • Validated simulation predictions through experimental testing.

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Main Results:

  • Internal relative velocity feedback generates damping within the inertial actuator.
  • An optimal combination of internal and external velocity feedback gains maximizes vibration reduction.
  • Experimental validation confirmed simulation predictions.

Conclusions:

  • Relative velocity feedback effectively stabilizes inertial actuators.
  • Optimized feedback control strategies enhance structural vibration reduction.
  • This approach offers improved performance for active damping systems.