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Summary
This summary is machine-generated.

This study introduces a feedforward compensation method to improve self-sensing piezoelectric actuators. The technique effectively addresses capacitance mismatching and local strain issues, enhancing active vibration control performance.

Keywords:
active flutter suppressioncapacitance mismatchingfeedforward compensationlocal strainself-sensing actuationsteepest descent algorithm

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Control Systems

Background:

  • Self-sensing piezoelectric actuators offer dual sensor/actuator functionality, valuable in various applications.
  • Practical use faces challenges: precise capacitance matching in bridge circuits and unwanted local strain affecting performance.

Purpose of the Study:

  • To propose and validate a feedforward compensation method for self-sensing piezoelectric actuators.
  • To mitigate issues of capacitance mismatching and local strain in piezoelectric actuator circuits.
  • To enhance the stability and performance of active vibration control systems.

Main Methods:

  • A feedforward compensation tunnel was integrated into a piezoelectric self-sensing circuit.
  • Steepest descent algorithms (time and frequency domains) were used to adjust compensation voltage gain.
  • Experimental validation was performed using active vibration control in a wind tunnel setting.

Main Results:

  • The proposed method significantly alleviated problems caused by capacitance mismatching and local strain.
  • Experimental results demonstrated improved stability and performance in active vibration control.
  • Comparison showed superior control performance with the compensated self-sensing actuation.

Conclusions:

  • Feedforward compensation is an effective strategy for overcoming limitations in self-sensing piezoelectric actuators.
  • The developed method enhances the reliability and efficiency of piezoelectric actuators in vibration control.
  • This approach offers a robust solution for practical applications requiring precise control.