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Study and effect of negative capacitance capacitors in piezoelectric shunt circuits

Zouglis Iraklis

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Summary

This thesis studies the effect of a negative capacitance circuit on mechanical vibrations damping in piezoelectric shunt systems. Mechanical vibrations are a common phenomenon in various mechanical systems and can lead to vibration, noise and reduced efficiency. The piezoelectric systems and their applications have attracted a lot of attention as they represent a promising area of research for damping mechanical vibrations. This study aims to investigate the effect of adding negative capacitances to the piezoelectric shunt circuits, on the efficiency of damping these vibrations. This technology is relatively recent, appears in the literature and is classified in the category of semi-active energy damping systems, in the sense that it probably requires some external energy for its implementation. The aim of the paper is to study the relevant literature and to integrate its results into existing computer programs in order to investigate its effectiveness.

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