Abstract

This paper discusses the development of a method to create modal coordinate sensors on two-dimensional structures. The sensor, which is made of a piezoelectric layer, is divided into an array of segments. The total output of the sensor is the weighted sum of the outputs of the segments. The purpose of this segmentation is to bypass the requirement for a continuous spatial variation of polarization, which is necessary in creating an ideal two-dimensional modal sensor but infeasible in practice and unworkable for most boundary conditions.

Analytical simulation on a simply-supported plate shows that the performance of a modal sensor created by configuring a segmented sensor approaches that of an ideal modal sensor. Modal filtering effects increase with the decrease in the segment size.

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