Vibroacoustical Performance Analysis of a Rigid Device Casing with Piezoelectric Shunt Damping.

Krzysztof Mazur,Jaroslaw Rzepecki,Marek Pawelczyk,Anna Pietruszewska,Stanislaw Wrona

doi:10.3390/s21072517

Krzysztof Mazur, Jaroslaw Rzepecki + Show 3 more

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https://doi.org/10.3390/s21072517

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Abstract

Noise and vibration are common issues that may have a negative impact on human’s’ health. To minimize their consequences, several vibroacoustical methods may be employed. One well-known method is Piezoelectric Shunt Damping (PSD). Over the years, many approaches have been investigated, from passive, state switching circuits to active pulse-switching. In this paper, the authors propose three PSD implementations—passive Synchronized Switch Damping on Inductor (SSDI), semi-active SSDI and active Synchronized Switch Damping on Voltage source (SSDV)—for a single-panel structure mounted on a rigid-frame casing. The nine Macro Fiber Composite (MFC) elements were mounted on the plate based on preliminary simulations in FreeFEM. Then, the theoretical results were validated by an identification experiment. The main research is concentrated on the Sound Pressure Level (SPL) and structural vibrations reduction for selected frequencies. The active method provided the highest reduction of vibration—up to 5.5 dB for maximal possible loudspeaker level without overdrive and up to 7.5 dB for lower excitation levels.

Highlights

Noise and vibration constitute a serious issue in the human environment [1]
This paper presents research on three types of vibration damping circuits: passive Synchronized Switch Damping on Inductor (SSDI), semi-passive SSDI and active SSDV
The research constitutes an extension of previously developed simulations and conducted experiments dedicated to structural vibration reduction

Summary

Introduction

Noise and vibration constitute a serious issue in the human environment [1]. Duration of exposure to noise, as well as its frequency, are crucial due to their impact on human health [2]. Possible consequences of prolonged exposure to environmental noise may include, among others, lower mental performance [3], stroke, heart disease, depression and lower job performance [4,5]. Noise is frequently a result of structures’ vibration. Vibration is common in domestic appliances, transportation, and manufacturing [6]. Exposure to vibration may be especially harmful for human health at low frequencies, up to 100 Hz [7]

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