Analysis of a Piezoelectric Sensor to Detect Flexural Waves

Veidt, Martin, Liu, Tierang and Kitipornchai, Sritawat (2001) Analysis of a Piezoelectric Sensor to Detect Flexural Waves. AIAA Journal of Guidance, Control and Dynamics, 24 5: 960-966.

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Author Veidt, Martin
Liu, Tierang
Kitipornchai, Sritawat
Title Analysis of a Piezoelectric Sensor to Detect Flexural Waves
Journal name AIAA Journal of Guidance, Control and Dynamics
Publication date 2001-01-01
Volume number 24
Issue number 5
Start page 960
End page 966
Subject 290900 Electrical and Electronic Engineering
Abstract In this paper the electro-mechanical transfer characteristics of adhesively bonded piezoelectric sensors are investigated. Using dynamic piezoelectricity theory, Mindlin plate theory for flexural wave propagation and a multiple integral transform method, the frequency response functions of piezoelectric sensors with and without backing materials are developed and the pressure-voltage transduction functions of the sensors calculated. The corresponding simulation results show that the sensitivity of the sensors is not only dependent on the sensors' inherent features such as piezoelectric properties and geometry, but also on local characteristics of the tested structures and the admittance and impedance of the attached electrical circuit. It is also demonstrated that the simplified rigid mass sensor model can be used to successfully analyse the sensitivity of the sensor at low frequencies, but that the dynamic piezoelectric continuum model has to be used for higher frequencies, especially around the resonance frequency of the coupled sensor-structure vibration system.
Keyword Piezoelectric transducers
Frequency response
Vibration control

Document type: Journal Article
Collection: School of Mechanical & Mining Engineering Publications
 
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Created: Wed, 04 Feb 2004, 10:00:00 EST by Belinda Weaver (EA)