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Closed loop cavitation control - A step towards sonomechatronics.

Kai-Alexander Saalbach1, Hendrik Ohrdes1, Jens Twiefel1

  • 1Institute of Dynamics and Vibration Research, Leibniz Universität Hannover, Hanover, Germany.

Ultrasonics Sonochemistry
|April 23, 2018
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Summary
This summary is machine-generated.

This study introduces sonomechatronics, using self-sensing ultrasound transducers to control cavitation intensity. This method achieved a 15% reduction in energy consumption for ultrasound-assisted processes.

Keywords:
CavitationClosed loop cavitation controlClosed loop controlSonochemistry

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Area of Science:

  • Sonochemistry
  • Mechatronics
  • Acoustics

Background:

  • Cavitation generation is crucial for many sonochemical processes.
  • Controlling cavitation intensity is key for process optimization.
  • Sonomechatronics is a new field focused on closed-loop control of sonochemical processes.

Purpose of the Study:

  • To investigate closed-loop control of ultrasound-assisted processes.
  • To explore the self-sensing technique for monitoring cavitation activity.
  • To establish sonomechatronics as a viable research field.

Main Methods:

  • Applied self-sensing technique using transducer electrical signals to monitor cavitation.
  • Identified a distinct frequency component indicating cavitation onset and termination.
  • Implemented a double set point closed-loop control system.

Main Results:

  • A specific frequency component in the transducer's current signal reliably indicates transient cavitation.
  • Observed hysteresis in cavitation onset and termination thresholds.
  • Achieved an approximate 15% reduction in mean driving current through closed-loop control.

Conclusions:

  • The self-sensing technique effectively monitors acoustic cavitation.
  • Closed-loop control in sonomechatronics offers significant energetic optimization potential.
  • Further research is needed for application-specific sonomechatronic process design.