Abstract

Piezoelectric shunt damping with mechanical structures has been an active researchtopic for several years. Standard passive techniques suffer from a very limitedand frequency-dependent damping performance. Recently, semi-active switchingtechniques—namely SSDI (synchronized switch damping on inductor) and SSDV(synchronized switch damping on voltage source) techniques—have been proposed, whichare capable of adapting to variations of the excitation frequency without reduction inperformance. Crucial for the damping performance is the tuning of the shunt parametersand the precise switching sequence.In this paper, an analytical analysis of the switching technique is presented, which includesthe influence of all shunt parameters and the switching times. New results concerning theoptimal tuning of the inductance and the switching sequence are obtained, and it is shownthat the enhanced SSDV technique can be equated with the SSDI technique, albeit with anincreased effective piezoelectric force factor. Measurements are conducted to validate thetheoretical results.

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