Authors
Ajay Dangi, Rudra Pratap
Publication date
2017/8/1
Journal
Sensors and Actuators A: Physical
Volume
262
Pages
18-28
Publisher
Elsevier
Description
We report a system level approach for design of Piezoelectric Micromachined Ultrasonic Transducers (PMUTs) with inclusion of residual tension. A multilayered circular plate model is used to derive the vibrational response of a PMUT subjected to, first a sinusoidal voltage input and second, a sinusoidal pressure load with frequencies near the first resonance of the PMUT. The model is simplified with the introduction of mode shape dependent nondimensional parameters that are found to change very little over a large range of design parameters. Introduction of these parameters leads to a tractable formulation for the forced response of the PMUT. Lumped model approach is used to derive expressions for overall performance parameters in terms of transfer functions of a PMUT acting as a transmitter, a receiver and a transceiver. These transfer functions are further used to develop parametric design maps of a PMUT …
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