Bt. Wang, CHARACTERIZATION OF TRANSFER-FUNCTIONS FOR PIEZOCERAMIC AND CONVENTIONAL TRANSDUCERS, Journal of intelligent material systems and structures, 7(4), 1996, pp. 390-398
This paper analytically derives the transfer functions for piezocerami
c and conventional transducers and characterizes their relationships i
n terms of frequency response function (FRF) and modal parameters such
as natural frequencies, damping ratios, and mode shapes. The FRFs bet
ween accelerometer/point force actuator. accelerometer/PZT actuator, P
VDF sensor/point force actuator, and PVDF sensor/PZT actuator are dete
rmined, respectively. Those FRFs are expressed in conventional modal m
odel format which can clearly get insight of physical meaning of modal
parameters. In particular, the mode shapes of accelerometer, point fo
rce actuator, PVDF sensor, and PZT actuator are identified and are pro
portional to the displacement mode shapes. The point and transfer FRFs
are then studied re, characterize their properties for either pair of
transducer applications. This work leads to the basis for active stru
ctural vibration and acoustic control and also draws on ideas for appl
ications of smart structural testing to system identification and diag
nosis.