Synthetic Impedance Circuits in Semi‐Passive Vibration Control with Piezo‐Ceramics ‐ Efficiency and Limitations

Abstract

Electrical circuits that represent complex impedance connected to the plates of piezo element affect the frequency response function of compound electromechanical systems. The external network consisting of inductance results in absorbing a certain frequency of vibrations. The performance can significantly be increased using negative capacitance. All the negative impedance elements are achievable via semi‐passive way with the use of an electronic gyrator realized by operational amplifiers that require power supply. Its performance is limited due to the maximum voltage operational amplifiers can produce. The higher excitation forces require higher output voltages of amplifiers. The aim of the paper is to present the relation between the required voltage on synthetic impedance and force excitation in 1DOF vibrating system regarding parameters of piezo element and mechanical system for absorbing case. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Research on the theory and simulation of piezo-hydraulic actuator

“…From the application point of view, the current approach based on vibration control of piezoelectric materials can be divided into semi-active [4][5][6][7] , semi-passive [8][9] as well as active and passive hybrid control [10] three categories.…”