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Experiments on Ultrasonic Lubrication Using a Piezoelectrically-assisted Tribometer and Optical Profilometer
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Vibroacoustical Performance Analysis of a Rigid Device Casing with Piezoelectric Shunt Damping.
Krzysztof Mazur1, Jaroslaw Rzepecki1, Anna Pietruszewska1
1Silesian University of Technology, Department of Measurements and Control Systems, Akademicka 16, 44-100 Gliwice, Poland.
Sensors (Basel, Switzerland)
|April 30, 2021
Summary
This study explores Piezoelectric Shunt Damping (PSD) methods, including passive Synchronized Switch Damping on Inductor (SSDI) and active Synchronized Switch Damping on Voltage source (SSDV), to reduce noise and vibration. The active SSDV method demonstrated the most effective vibration reduction.
Area of Science:
- Acoustics
- Mechanical Engineering
- Materials Science
Background:
- Noise and vibration negatively impact human health.
- Vibroacoustical methods are crucial for mitigating these effects.
- Piezoelectric Shunt Damping (PSD) is a key technique in this field.
Purpose of the Study:
- To investigate and compare three PSD implementations: passive SSDI, semi-active SSDI, and active SSDV.
- To assess the effectiveness of these methods in reducing sound pressure level (SPL) and structural vibrations.
- To validate theoretical findings through experimental identification.
Main Methods:
- Implementation of passive SSDI, semi-active SSDI, and active SSDV on a single-panel structure.
- Use of nine Macro Fiber Composite (MFC) elements, positioned based on FreeFEM simulations.
- Experimental validation of theoretical results and measurement of SPL and vibration reduction.
Main Results:
- The active SSDV method achieved the highest vibration reduction.
- Reductions of up to 5.5 dB were observed at maximal loudspeaker levels.
- Up to 7.5 dB reduction was achieved at lower excitation levels.
Conclusions:
- Active PSD methods, specifically SSDV, offer significant potential for noise and vibration control.
- The study validates the efficacy of MFC elements and PSD techniques in structural damping.
- Further research can build upon these findings for enhanced vibroacoustical performance.
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