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Open AccessArticle

Voltage-Controlled Synthetic Inductors for Resonant Piezoelectric Shunt Damping: A Comparative Analysis

1
Weapons Engineering Systems and Mechatronic Department, Military Technical Academy, 050141 Bucharest, Romania
2
Physics Department, Babes-Bolyai University, 400084 Cluj-Napoca, Romania
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(22), 4777; https://doi.org/10.3390/app9224777
Received: 15 October 2019 / Revised: 2 November 2019 / Accepted: 5 November 2019 / Published: 8 November 2019
(This article belongs to the Collection Recent Applications of Active and Passive Noise Control)
In this paper, the design, simulations, and experimental results related to new analog circuits for voltage controlled synthetic inductors (VCSI) are presented. The new circuits based on a generalized impedance converter (GIC) are proposed for adaptive resonant piezoelectric shunt damping. The VCSIs are implemented using (1) an analog multiplier and (2) an operational transconductance amplifier (OTA) as voltage-controlled resistor. The simulation and experimental results for the new proposed VCSIs are presented and a comparative analysis follows. The proposed VCSIs work in a stable manner in parallel with negative impedance converters (NIC) to enhance structural damping in resonant piezoelectric resistive-inductive shunt applications. The behavior of the synthetic inductor is identical to a real inductor only in a specific frequency range and this situation can explain the reported spreading performance in the literature for resonant piezoelectric shunt damping. The simulation results are validated by a group of experimental investigations that confirm the improved stability and linearity of the new circuits proposed as VCSIs. Experimental results show that the VCSI based on an analog multiplier have an enhanced linearity in comparison with the OTA version in a limited voltage control range. View Full-Text
Keywords: synthetic inductor; voltage control; resonant piezoelectric damping; analog multiplier; operational transconductance amplifier synthetic inductor; voltage control; resonant piezoelectric damping; analog multiplier; operational transconductance amplifier
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MDPI and ACS Style

Vatavu, M.; Nastasescu, V.; Turcu, F.; Burda, I. Voltage-Controlled Synthetic Inductors for Resonant Piezoelectric Shunt Damping: A Comparative Analysis. Appl. Sci. 2019, 9, 4777.

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