Design of an MR-compatible piezoelectric actuator for MR elastography

2002 ◽  
Vol 15 (4) ◽  
pp. 239-254 ◽  
Author(s):  
Kai Uffmann ◽  
Claus Abicht ◽  
Wolfgang Grote ◽  
Harald H. Quick ◽  
Mark E. Ladd
Keyword(s):  
Piezoelectric Actuator ◽  
Mr Elastography

Piezoelectric actuator design for MR elastography: implementation and vibration issues

2011 ◽  
Vol 7 (3) ◽  
pp. 353-360 ◽  
Author(s):  
Zion Tsz Ho Tse ◽  
Yum Ji Chan ◽  
Henning Janssen ◽  
Abbi Hamed ◽  
Ian Young ◽  
...  
Keyword(s):  
Piezoelectric Actuator ◽  
Mr Elastography ◽  
Actuator Design

MR-Elastography of the Parotid Gland: Feasibility and First Experiences

2006 ◽  
Vol 177 (01) ◽  
Author(s):  
CR Habermann ◽  
R Sinkus ◽  
A Albrecht ◽  
MC Cramer ◽  
F Weiss ◽  
...  
Keyword(s):  
Parotid Gland ◽  
Mr Elastography

Structural-parametric model of an electroelastic actuator for nanomechanics

2020 ◽  
pp. 3-11
Author(s):  
S.M. Afonin
Keyword(s):  
Transfer Function ◽  
Piezoelectric Actuator ◽  
Transfer Functions ◽  
Piezoelectric Effect ◽  
Parametric Model ◽  
Elastic Compliance ◽  
Parametric Models ◽  
Piezo Actuator ◽  
Structural Scheme ◽  
Model Transfer

Structural-parametric models, structural schemes are constructed and the transfer functions of electro-elastic actuators for nanomechanics are determined. The transfer functions of the piezoelectric actuator with the generalized piezoelectric effect are obtained. The changes in the elastic compliance and rigidity of the piezoactuator are determined taking into account the type of control. Keywords electro-elastic actuator, piezo actuator, structural-parametric model, transfer function, parametric structural scheme

scholarly journals Design, Analysis, and Experiment on a Novel Stick-Slip Piezoelectric Actuator with a Lever Mechanism

Micromachines ◽  
2019 ◽  
Vol 10 (12) ◽  
pp. 863 ◽  
Author(s):  
Weiqing Huang ◽  
Mengxin Sun
Keyword(s):  
Piezoelectric Actuator ◽  
Simple Structure ◽  
Fast Response ◽  
Displacement Sensor ◽  
Design Parameters ◽  
The Finite Element Method ◽  
Stick Slip ◽  
Lever Mechanism ◽  
Series Of Experiments ◽  
Stator Design

A piezoelectric actuator using a lever mechanism is designed, fabricated, and tested with the aim of accomplishing long-travel precision linear driving based on the stick-slip principle. The proposed actuator mainly consists of a stator, an adjustment mechanism, a preload mechanism, a base, and a linear guide. The stator design, comprising a piezoelectric stack and a lever mechanism with a long hinge used to increase the displacement of the driving foot, is described. A simplified model of the stator is created. Its design parameters are determined by an analytical model and confirmed using the finite element method. In a series of experiments, a laser displacement sensor is employed to measure the displacement responses of the actuator under the application of different driving signals. The experiment results demonstrate that the velocity of the actuator rises from 0.05 mm/s to 1.8 mm/s with the frequency increasing from 30 Hz to 150 Hz and the voltage increasing from 30 V to 150 V. It is shown that the minimum step distance of the actuator is 0.875 μm. The proposed actuator features large stroke, a simple structure, fast response, and high resolution.

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