Abstract
The design and function of piezoceramic devices containing either one (unimorph) or two (bimorph) piezoceramic disks are described. The function of these devices is to null the transmitted displacement field or both the transmitted and reflected displacement fields when a displacement or pressure field is impressed on one side of the device. Such a device can be used to actively control vibrations of a given frequency by suitably adjusting the voltages that can be applied to one or both the disks. For the unimorph device, fairly wideband conditions of zero transmission can be achieved. For the bimorph device, voltages to the two disks are independently controlled so as to achieve simultaneously the desired conditions of zero reflection and transmission. One or both voltage sources may drain energy from the system. In each case the equivalent electric circuit can be modeled so that the current‐voltage characteristics of the device can be calculated and plotted. The piezoceramics are composite in construction containing a piezoelectric phase dispersed in a nonpiezoelectric phase so that the device has the needed mechanical and electromechanical coupling coefficients.
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call