A Comparison of Conventional and Impedance Methods for Modeling Piezoelectric Materials Actuation in Smart Structures

1998 ◽  
Vol 120 (3) ◽  
pp. 685-688 ◽  
Author(s):  
Y. Wang ◽  
J. C. Slater
Keyword(s):  
Conventional Method ◽  
Piezoelectric Materials ◽  
Smart Structures ◽  
Piezoelectric Actuators ◽  
Dynamic Interaction ◽  
Impedance Method ◽  
Equivalent Models ◽  
Pros And Cons

In this paper two distinct methods, an impedance method and a “conventional” method, for modeling the dynamic interaction between the piezoelectric actuators/sensors and the substructures are summarized. It is demonstrated that both methods yield equivalent models for the beam with piezoceramic actuation. The pros and cons of each technique are discussed.

Compact Drive Electronics for Solid-State Actuators

2000 ◽  
Author(s):  
Jeffrey S. N. Paine ◽  
David S. Bennett ◽  
Carlos E. Cuadros
Keyword(s):  
Solid State ◽  
Power Electronics ◽  
Piezoelectric Material ◽  
Piezoelectric Actuator ◽  
Power Dissipation ◽  
Piezoelectric Materials ◽  
Piezoelectric Actuators ◽  
Linear Amplifier ◽  
Overall Efficiency ◽  
Electronics Packages

Abstract As piezoelectric actuators are developed for high strokes and/or high force applications, the amount of piezoelectric material used in the actuator must also increase. Reducing the size of drive electronics becomes difficult using traditional linear power electronics packages when applications require as much as 40 μF of piezoelectric load. In order to efficiently drive piezoelectric actuator systems, bi-directional systems (drivers that recover the energy put into the piezoelectric capacitor) must be used. Since less than 10% of the power going into the piezoelectric actuator is real versus the large reactive load used to power the piezoelectric materials, bidirectional systems have a much higher efficiency. A comparison is made between traditional linear and PWM amplifier systems and tailored piezoelectric bi-directional driver systems. Bi-directional systems have power dissipation levels up to 1/8th those of traditional linear amplifier systems. In the course of the research both linear and PWM concepts were investigated. A rationale for comparing the overall efficiency of drive electronics systems is presented. Some innovative efficient concepts for piezoelectric system drivers are presented and discussed.

Numerical modeling for viscoelastic sandwich smart structures bonded with piezoelectric materials

2021 ◽  
pp. 114703
Author(s):  
S.Q. Zhang ◽  
Y.S. Gao ◽  
G.Z. Zhao ◽  
H.Y. Pu ◽  
M. Wang ◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Piezoelectric Materials ◽  
Smart Structures

Application of Piezoelectric Materials for Monitoring the Growth of Defects in Structures

2010 ◽  
Vol 643 ◽  
pp. 113-118 ◽  
Author(s):  
Sergio Ricardo Kokay Morikawa ◽  
Daniel Pontes Lannes ◽  
Antonio Lopes Gama
Keyword(s):  
Strain Field ◽  
Piezoelectric Materials ◽  
Piezoelectric Actuators ◽  
Frame Structure ◽  
Piezoelectric Sensors ◽  
Dynamic Strain ◽  
Damage Growth ◽  
Defect Depth ◽  
Active Method ◽  
Electromechanical Responses

This paper presents the results of an experimental investigation on the use of piezoelectric materials as a technique for monitoring the growth of defects in structures. The method consists of exciting the structure with piezoelectric actuators while recording the electromechanical responses from sensors placed close to the defect. The piezoelectric sensors detect the damage growth or an incipient defect by monitoring changes in the dynamic strain field, induced by the piezoelectric actuator, near the defect. This technique was evaluated through experiments using an aluminum frame structure. Results show that the piezoelectric active method is capable of detecting small changes in defect depth.

Damage Modeling and Detection in Smart Composites

2000 ◽  
Author(s):  
Aditi Chattopadhyay ◽  
Dan Dragomir-Daescu
Keyword(s):  
Composite Laminates ◽  
Composite Structures ◽  
Piezoelectric Materials ◽  
Piezoelectric Actuators ◽  
Order Theory ◽  
Higher Order ◽  
Damage Indices ◽  
Higher Order Theory ◽  
Extent Of Damage ◽  
Reliability And Robustness

Abstract The presence of damage in structures made out of composite and/or piezoelectric materials can cause significant degradation in structural performance. In the present paper, damage indices based on two-dimensional gapped smoothing technique and model strains are developed in order to enhance the accuracy in predicting the location and extent of damage in composite structures. Structural analysis is performed based on a refined higher order theory, which can capture the transverse shear effects in anisotropic laminates. An approach using the developed damage indices and the laminate model of the higher order theory is employed to model and identify delaminations in composite laminates. It is also used in the delamination analysis of composite laminates with piezoelectric actuators. The proposed modal strain based damage indexes are used to perform delamination analysis. Comparison study is performed to illustrate that the reliability and robustness of the new proposed damage indices in locating delaminations in composite and smart composite structures. The effects on modal strain and damage indices due to the presence of surface bounded piezoelectric actuators are also presented and discussed.

Characterization of Piezoelectric Material Properties Using Atomistic Simulations

2019 ◽  
Author(s):  
Y. H. Park ◽  
I. Hijazi
Keyword(s):  
Piezoelectric Material ◽  
Structural Damage ◽  
Piezoelectric Materials ◽  
Piezoelectric Actuators ◽  
Structural Condition ◽  
Pressure Vessels ◽  
Piezoelectric Response ◽  
Damage Monitoring ◽  
Stress And Deformation ◽  
Dynamics Simulations

Abstract Damage monitoring in pipes and pressure vessels are important to ensure safety and reliability of these structures. Structural damage monitoring based on an actuator-sensor system is a promising technology to obtain real-time information for structural condition. Since piezoelectric materials in electromechanical systems can detect mechanical responses such stress and deformation as a sensor or perform a defined work as an actuator, piezoelectric actuators/sensors are extensively used in damage detection. In the design of piezoelectric actuators and sensors, it is important to know the properties of the piezoelectric material, in particular, piezoelectric constants to predict its actuation/sensing performance. In this study we determine a piezoelectric constant of ZnO using molecular dynamics simulations. We introduced a shell degree of freedom to the core-only atomic potential to enable polarization of the ion caused by an electric field. This modeling technique allowed for accurate piezoelectric response of the molecular structure.

On the Nonlinear Behavior of Piezoelectric Actuators

2004 ◽  
Vol 10 (3) ◽  
pp. 387-398 ◽  
Author(s):  
M. Arafa ◽  
A. Baz
Keyword(s):  
Harmonic Balance ◽  
Linear Models ◽  
Mechanical Response ◽  
Piezoelectric Materials ◽  
Constitutive Relations ◽  
Primary Resonance ◽  
Nonlinear Behavior ◽  
Piezoelectric Actuators ◽  
Electrical Excitation ◽  
Lumped Parameter

In this paper we present a theoretical and experimental study of the nonlinear behavior of piezoelectric actuators. The nonlinearities are introduced as quadratic terms in the piezoelectric constitutive relations. These relations are employed, together with supporting experimental results, to establish an engineering description of the nonlinearities present in piezoelectric materials. We present a lumped-parameter representation of a system consisting of a piezoactuator driving a mass. The representation is valid in the vicinity of the primary resonance. The resulting nonlinear differential equation of motion is analyzed by the method of harmonic balance to study the effects of nonlinearities on the dynamics of forced vibrations. Experimental measurements of the steady-state mechanical response to harmonic electrical excitation over a range of excitation frequencies and amplitudes quantify the nature and level of nonlinear behavior. The nonlinear behavior, which is mainly evident around the resonant frequency, is shown to be of the softening type and becomes more pronounced at higher drive voltage levels. Numerical simulations based on the developed nonlinear model have shown significant improvement over previous linear models in predicting the experimental behavior of piezoelectric materials at the vicinity of primary resonance.

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