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Dissertations / Theses on the topic 'Piezoelectric actuation'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Bent, Aaron Alton. "Piezoelectric fiber composites for structural actuation." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/12322.

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2

Jiang, Hong Wen. "Piezoelectric thin film actuation of RF MEMS devices." Thesis, Cranfield University, 2004. http://dspace.lib.cranfield.ac.uk/handle/1826/10442.

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This thesis investigates the piezoelectric thin film actuation of RF MEMS devices. lt is demonstrated that piezoelectric actuation using silicon structures with integrated PZT thin film is suitable for RF MEMS switches and mechanical filters. Both these devices are studied, fabricated and tested. To assist the mechanical design of a piezoelectric microswitch an electrical model is developed, from which design parameters can be derived to meet the requirement of an insertion loss of -1dB and an isolation loss of -40dB at 4GHz. The model shows how the switching gap and the overlapping dimension

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3

Persson, Johan. "Design and control of piezoelectric actuation for hydraulic valves." Thesis, University of Bath, 2017. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.760941.

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Servohydraulic systems are widely used for actuation where high force and fast response are needed, and the servovalve is the type of control valve which provides the highest performance for such systems. In aerospace, servovalves are used for many safety critical systems, such as flight control, steering and braking. However, during the last fifty years the conventional two stage servovalve design for aerospace applications has hardly changed. Due to the desire for increased energy efficiency, there is a need to make valves more efficient and lighter. A new type of servovalve for aerospace ap

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4

Bertin, Michael. "Piezoelectric actuation of an aero engine fuel metering valve." Thesis, University of Bath, 2017. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.723329.

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Servo valves are used in a broad variety of flow modulation applications. In the field of aerospace, servo valves are used in aero engines to meter fuel flow. The existing valves are labour intensive to manufacture and highly optimised such that to achieve improvements in performance requires a novel design. This research investigates smart material actuators and valve concepts. Specifically, a prototype pilot stage nozzle flapper valve is developed for the purpose of actuating a main stage spool. The typical nozzle flapper type servo valve uses a torque motor to actuate the flapper. In this r

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5

Conway, Nicholas J. (Nicholas James) 1979. "MEMS amplification of piezoelectric strain for in-plane actuation." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/89382.

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6

Bray, Brian Christopher. "Advanced sensing and actuation techniques using Piezoelectric polymer materials." The Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406640736.

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7

Webber, Kyle Grant. "Characterization of Actuation and Fatigue Properties of Piezoelectric Composite Actuators." Thesis, Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/7127.

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Epoxy composite laminated piezoelectric stress-enhanced actuators (ECLIPSE) have been developed for potential applications by the United States Air Force and others. This class of actuators offers several advantages over other unimorph actuators such as lighter weight, design flexibility, and short production time. Anisotropic differential thermal expansion is utilized in the design of the actuators to achieve large out-of-plane curvature and place the brittle piezoelectric ceramic in residual compression. The numerous composite material choices and configurations can be used to control

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8

Koch, Michael. "Silicon micromachined pumps employing piezoelectric membrane actuation for microfluidic systems." Thesis, University of Southampton, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390407.

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9

Mane, Poorna. "Integrated Actuation And Energy Harvesting In Prestressed Piezoelectric Synthetic Jets." VCU Scholars Compass, 2009. http://scholarscompass.vcu.edu/etd/1903.

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With the looming energy crisis compounded by the global economic downturn there is an urgent need to increase energy efficiency and to discover new energy sources. An approach to solve this problem is to improve the efficiency of aerodynamic vehicles by using active flow control tools such as synthetic jet actuators. These devices are able to reduce fuel consumption and streamlined vehicle design by reducing drag and weight, and increasing maneuverability. Hence, the main goal of this dissertation is to study factors that affect the efficiency of synthetic jets by incorporating energy harvesti

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10

Onawola, Oluseyi Olasupo Foster Winfred A. "A feedback linearization approach for panel flutter suppression with piezoelectric actuation." Auburn, Ala, 2008. http://hdl.handle.net/10415/1404.

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11

Pizzochero, Alessandro. "Residual actuation and stiffness properties of piezoelectric composites : theory and experiment." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/50323.

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12

Samur, Algan. "Flexible piezoelectric composites and concepts for bio-inspired dynamic bending-twisting actuation." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47680.

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13

Royle, Christopher Michael. "The mechanics of a micro-engineered gyroscope with piezoelectric actuation and sensing." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342484.

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14

Mollenhauer, David Hilton. "Induced strain of actuation of surface bonded and embedded piezoceramic patches." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-07212009-040237/.

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15

Sodano, Henry Angelo. "Macro-Fiber Composites for Sensing, Actuation and Power Generation." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/34289.

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The research presented in this thesis uses the macro-fiber composite (MFC) actuator that was recently developed at the NASA Langley Research Center for two major themes, sensing and actuation for vibration control, and power harvesting. The MFC is constructed using piezofibers embedded in an epoxy matrix and coated with Kapton skin. The construction process of the MFC affords it vast advantages over the traditionally used piezoceramic material. The MFC is extremely flexible, allowing it to be bonded to structures that have curved surface without fear of accidental breakage or additional sur

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16

Piekarski, Brett Harold. "Lead zirconate titanate thin films for piezoelectric actuation and sensing of mems resonators." College Park, Md. : University of Maryland, 2005. http://hdl.handle.net/1903/3195.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2005.<br>Thesis research directed by: Mechanical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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17

Nasser, Khalil Maurice. "Development and Analysis of the Lumped Parameter Model of a Piezo-Hydraulic Actuator." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/35781.

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Hybrid actuation is an expanding field in which several systems, such as a mechanical, electrical, hydraulic, pneumatic, and/or thermal, among others, are integrated in order to combine certain aspects of each system, and achieve a better and more efficient performance under certain operating conditions. The concept of piezohydraulic actuation takes advantage of the high force capabilities that piezoceramics have and combines it with the operation at high frequencies, in order to achieve the hydraulic actuation of a system under a specified stroke and force. High frequency rectification tra

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18

Zhang, Jiawei. "Multi-functional nanocomposites for the mechanical actuation and magnetoelectric conversion." Phd thesis, INSA de Lyon, 2011. http://tel.archives-ouvertes.fr/tel-00765011.

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Magnetoelectric (ME) interactions in matter correspond to the appearance of magnetization by means of an electric field (direct effect) or the appearance of electric polarization by means of a magnetic field (converse effect). The composite laminates which possess large ME coefficient, have attracted much attention in the field of sensors, modulators, switches and phase inverters. In this thesis, we report on the ME performances of the bi- and tri- layered composites. It is shown that their ME couplings can be achieved by combining magnetostrictive and piezoelectric layers. A model based on a

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19

Deng, Jie. "Rear Axle Gear Whine Noise Abatement via Active Vibration Control of the Rear Subframe." University of Dayton / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1447772359.

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20

Spangler, Ronald L. 1964. "Broadband control of structural vibration using simultaneous sensing and actuation with nonlinear piezoelectric currents." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/12210.

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21

Lin, Ching-Yu 1972. "Material characterization and modeling for piezoelectric actuation and power generation under high electromechanical driving levels." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/8100.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2002.<br>Includes bibliographical references (p. 257-262).<br>High electromechanical loads parallel to piezoelectric polarization might result in depolarization of the material, depending on the material property itself and the external excitations such as electrical field, electrical driving frequency, stress and stress duration. In this work, material properties under these effects were first characterized experimentally. The experiments included monitoring general piezoelectric responses of PZT-5H

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22

Na, Sungsoo. "Control of Dynamic Response of Thin-Walled Composite Beams Using Structural Tailoring and Piezoelectric Actuation." Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/29828.

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A dual approach integrating structural tailoring and adaptive materials technology and designed to control the dynamic response of cantilever beams subjected to external excitations is addressed. The cantilevered structure is modeled as a thin-walled beam of arbitrary cross-section and incorporates a number of non-classical effects such as transverse shear, warping restraint, anisotropy of constituent materials and heterogeneity of the construction. Whereas structural tailoring uses the anisotropy properties of advanced composite materials, adaptive materials technology exploits the actuati

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23

Herdic, Scott Lucas. "Developement of Piezo-Hydraulic Actuation Systems Technology for use on a Helicopter Trailing Edge Flap." Thesis, Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/7556.

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The purpose of this study was to create a proof-of-concept piezoelectric actuator system capable of meeting the performance requirements necessary for actuation of a trailing edge flap for a helicopter main rotor blade. Due to extremely small displacements produced by piezoelectric actuators, their output is amplified several times in order to produce the required displacement for this device. The amplification is accomplished in two stages. The first stage, mechanical amplification, uses differential length lever arms to increase the piezoelectric actuator output. The second stage, hydrau

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24

Sadiq, Muhammad. "Enhanced biopsy and regional anaesthesia through ultrasound actuation of a standard needle." Thesis, University of Dundee, 2013. https://discovery.dundee.ac.uk/en/studentTheses/d91b5edd-7d42-4ebe-a7b8-1c2ffb440e9b.

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There is an urgent and unmet clinical need to improve accuracy and safety during needle-based interventional procedures including regional anaesthesia and cancer biopsy. In ultrasound guided percutaneous needle procedures, there is a universal problem of imaging the needle, particularly the tip, especially in dense tissues and steep insertion angles. Poor visualization of the needle tip can have serious consequences for the patients including nerve damage and internal bleeding in regional anaesthesia and, in the case of biopsy, mis-sampling, resulting in misdiagnosis or the need for repeat bio

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25

Krupa, Katarzyna. "Opto-numerical analysis of AIN piezoelectric thin film operating as an actuation layer in MEMS cantilevers." Phd thesis, Université de Franche-Comté, 2009. http://tel.archives-ouvertes.fr/tel-00544852.

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L'objectif de ce mémoire de thèse consiste à étudier et caractériser les propriétés de couche mince piézoélectrique de nitrure d'aluminium (AlN) utilisées comme une couche d'actionnement de micropoutres multimorphes actionnées piézoélectriquement et à évaluer leurs performances micromécaniques. Ce travail a été effectué en utilisant une méthodologie hybride basée sur l'interaction entre le modèle physique et mathématique des objets étudiés. Ces recherches ont été faites dans le cadre d'une thèse de doctorat effectuée en cotutelle entre l'Université de Franche-Comté et l'Université Technologiqu

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26

Prechtl, Eric Frederick. "Design and implementation of a piezoelectric servo-flap actuation system for helicopter rotor individual blade control." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/9266.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2000.<br>Includes bibliographical references (p. 177-186).<br>A novel new actuator for helicopter rotor control, the X-Frame Actuator, was developed, demonstrating superior performance for applications requiring compact, fast acting, large stroke actuation. The detailed experimental characterization of this actuator is described, including bench-top output energy measurements and transverse shake test performance. A Mach scaled rotor blade utilizing the X-Frame actuator to power a trailing edge servo-

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27

Sun, Fanping. "Piezoelectric active sensor and electric impedance approach for structural dynamic measurement." Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-08292008-063023/.

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28

Neelakantan, Vijay Anand. "Modeling, design, testing and control of a two-stage actuation mechanism using piezoelectric actuators for automotive applications." Connect to resource, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1127236489.

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Thesis (Ph. D.)--Ohio State University, 2005.<br>Title from first page of PDF file. Document formatted into pages; contains xvii, 213 p.; also includes graphics (some col.). Includes bibliographical references (p. 206-213). Available online via OhioLINK's ETD Center

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29

Neelakantan, Vijay. "Modeling, design, testing and control of a two-stage actuation mechanism using piezoelectric actuators for automotive applications." The Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=osu1127236489.

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30

Headings, Leon Mark. "Modeling, characterization, and design of smart material driven stick-slip actuation mechanisms." Connect to resource, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1141700440.

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31

Couldrick, Jonathan Stuart Aerospace Civil &amp Mechanical Engineering Australian Defence Force Academy UNSW. "A study of swept and unswept normal shock wave/turbulent boundary layer interaction and control by piezoelectric flap actuation." Awarded by:University of New South Wales - Australian Defence Force Academy. School of Aerospace, Civil and Mechanical Engineering, 2006. http://handle.unsw.edu.au/1959.4/38672.

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The interaction of a shock wave with a boundary layer is a classic viscous/inviscid interaction problem that occurs over a wide range of high speed aerodynamic flows. For example, on transonic wings, in supersonic air intakes, in propelling nozzles at offdesign conditions and on deflected controls at supersonic/transonic speeds, to name a few. The transonic interaction takes place at Mach numbers typically between 1.1 and 1.5. On an aerofoil, its existence can cause problems that range from a mild increase in section drag to flow separation and buffeting. In the absence of separation the drag

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32

Gex, Dominique. "Ultrasonic NDE testing of a gradient enhanced piezoelectric actuator (GEPAC) undergoing low frequency bending excitation." Thesis, Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-04062004-171807/unrestricted/gex%5Fdominique%5Fc%5F200405%5Fmast.pdf.

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Thesis (M.S.)--Mechanical Engineering, Georgia Institute of Technology, 2004.<br>Berthelot, Committee Chair; Lynch, Committee Member; Jacobs, Committee Member. Includes bibliographical references (leaves 111-113).

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33

Carvalho, Paulo A. "Advancing Technologies for Interventional MRI Robotics with Clinical Applications." Digital WPI, 2019. https://digitalcommons.wpi.edu/etd-dissertations/577.

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An MRI’s superior soft tissue contrast and ability to perform parametric scanning make it a powerful tool for use during medical procedures; from surgery to rehabilitation. However, the MRI’s strong static magnetic field, fast switching gradients and constrained space make accomplishing procedures within it difficult. Recent advances in the field of robotics have enabled the creation of devices capable of assisting medical practitioners in this environment. In this work, technologies to enable the use and control of robotic assistive devices for MRI interventions are presented. This includes a

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34

Carvalho, Paulo A. "Advancing Technologies for Interventional MRI Robotics with Clinical Applications." Digital WPI, 2020. https://digitalcommons.wpi.edu/etd-dissertations/616.

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An MRI’s superior soft tissue contrast and ability to perform parametric scanning make it a powerful tool for use during medical procedures; from surgery to rehabilitation. However, the MRI’s strong static magnetic field, fast switching gradients and constrained space make accomplishing procedures within it difficult. Recent advances in the field of robotics have enabled the creation of devices capable of assisting medical practitioners in this environment. In this work, technologies to enable the use and control of robotic assistive devices for MRI interventions are presented. This includes a

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35

Vasilescu, Roxana. "Helicopter blade tip vortex modifications in hover using piezoelectrically modulated blowing." Diss., Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-11192004-165246/unrestricted/vasilescu%5Froxana%5F200412%5Fphd.pdf.

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Thesis (Ph. D.)--Aerospace Engineering, Georgia Institute of Technology, 2005.<br>Dancila, Stefan, Committee Chair ; Sankar, Lakshmi, Committee Member ; Ruzzene, Massimo, Committee Member ; Smith, Marilyn, Committee Member ; Yu, Yung, Committee Member. Vita. Includes bibliographical references.

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36

McPherson, Timothy Steven. "A force and displacement self-sensing method for a mri compatible tweezer end effector." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/44829.

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This work describes a self-sensing technique for a piezoelectrically driven MRI-compatible tweezer style end effector, suitable for robot assisted, MRI guided surgery. Nested strain amplification mechanisms are used to amplify the displacement of the piezo actuators to practical levels for robotics. By using a hysteretic piezoelectric model and a two port network model for the compliant nested strain amplifiers, it is shown that force and displacement at the tweezer tip can be estimated if the input voltage and charge are measured. One piezo unit is used simultaneously as a sensor and an actua

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37

Giurgea, Constantin. "Precise motion with piezoelectric actuator." Thesis, University of Ottawa (Canada), 2002. http://hdl.handle.net/10393/6184.

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The purpose of this study is to determine the displacement performance of a high accuracy-positioning device equipped with three piezo ceramic actuators. The displacement performance of each individual actuator is investigated in order to perform controlled motion over a very small range. A nanometric precision three-degrees of freedom positioner was designed and fabricated. In order to design a proper closed-loop controller, the open loop characteristics of the nanopositioner were experimentally investigated.

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38

Qiu, Yan. "Distributed piezoelectric actuator with complex shape." Thesis, Peninsula Technikon, 2002. http://hdl.handle.net/20.500.11838/1263.

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Thesis (MTech (Mechanical Engineering))--Peninsula Technikon, Cape Town, 2002<br>Distributed Piezoelectric Actuator (DPA) is one kind of actuator in the smart technology field. Firstly, DPA is one kind of solid-state actuator, and can be embedded in the structure. Secondly, it can be controlled by the electrical signal with high bandwidth and high precision. So it can be applied in the many different fields, such as high-resolution positioning, noise and vibration detection and shape control. Up to now, all of the DPA theory investigations and the product designs are based on applying th

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39

Henslee, Isaac Andrew. "Macrofiber piezoelectric composite for lunar exploration actuator." Thesis, Montana State University, 2010. http://etd.lib.montana.edu/etd/2010/henslee/HensleeI0810.pdf.

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Understanding the nature and location of water and other resources on Earth's Moon is an essential component to the National Aeronautics and Space Administration's (NASA) space exploration efforts. To aid in these exploration efforts, an investigation into lightweight and reliable materials for a lunar valve actuator design has lead to characterizing the lifetime performance of the piezoelectric fiber composite, macro fiber composite (MFC). MFC's are thin rectangular patches made of polyimide film, epoxy and a single layer of rectangular lead zirconium titanate fibers and are commercially avai

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40

Fu, Bo. "Piezoelectric actuator design via multiobjective optimization methods." kostenfrei, 2005. http://ubdata.uni-paderborn.de/ediss/10/2005/fu/.

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41

deSa, Johann Lec Ryszard. "Manipulation of microparticles using a piezoelectric actuator /." Philadelphia, Pa. : Drexel University, 2009. http://hdl.handle.net/1860/3197.

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42

Tuncdemir, Safakcan. "Design Of Mini Swimming Robot Using Piezoelectric Actuator." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605682/index.pdf.

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This thesis deals with the design, fabrication and analysis of a novel actuator for a fish-like swimming mini robot. The developed actuator is tested on a mini boat. The actuator relies on a novel piezoelectric ultrasonic motor, developed according to the design requirements of actuator for fish-like swimming mini robots. Developed motor is within the dimensions of 25x6x6 mm in a simple mechanical structure with simple driving circuitry compared to its predecessor. Bidirectional rotation of the motor is transformed to a flapping tail motion for underwater locomotion in a simple mechatronic str

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43

Holmes, J. E. "Novel piezoelectric structures for sensor and actuator applications." Thesis, University of Birmingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.399477.

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44

Mtawa, Alexander Nikwanduka. "Influence of geometry and material properties on the optimum performance of the C-shape piezo-composite actuator." Thesis, Cape Peninsula University of Technology, 2008. http://hdl.handle.net/20.500.11838/1301.

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Thesis (DTech (Mechanical Engineering))--Cape Peninsula University of Technology, 2008<br>In recent years, due to rapid advances in technology there has been an increasingly high demand for large displacement and large force, precise positioning, fast response, low power consuming miniature piezoelectric actuators. In certain smart structure applications, the use of curved piezoelectric actuators is necessary. The present work extends the earlier investigations on the C- shape actuator by providing a detailed investigation on the influence of geometric and material properties of t

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45

Vinge, Even. "Nanopositioning : Construction and Analysis of a Piezoelectric Tube Actuator." Thesis, Norwegian University of Science and Technology, Department of Engineering Cybernetics, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-9866.

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<p>Piezoelectric tubes are commonly used as scanning actuators in nano precision microscopes. They can achieve precision down to sub-nanometer scale, but their vibrational dynamics and nonlinear properties hamper their ability to achieve higher bandwidths. In order to deal with this, further research is needed. This thesis is a first look into the field of piezoelectric tube actuators, intended to lay the groundwork for further research on the subject at NTNU. It details the construction of a laboratory setup for actuation and nanometer displacement measurement of a piezoelectric tube. Neede

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46

Chi, Zi Qiang. "Fuzzy feedback control of piezoelectric actuator with feedforward compensation." Thesis, University of Macau, 2015. http://umaclib3.umac.mo/record=b3335773.

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47

Ring, Emma. "Modelling a piezoelectric-driven actuator for active flow control." Thesis, Linköpings universitet, Reglerteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-114957.

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Flow control is an area of research of particular interest within automotive and aerospace industries since methods used to affect the fluid flow around vehicles can reduce drag and therefore lower their fuel consumption. One of these methods, which has generated a lot of interest in later years, is called active flow control and uses different types of actuators to impact the surrounding flow. In this thesis a model of a piezoelectric actuator for active flow control has been developed using Lumped Element Modelling and equivalent circuits. This approach, together with the chosen software for

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48

Davis, Brandon Witt. "Constitutive behavior and reliability of actuator materials." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/17856.

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49

Sharp, Scott L. "Design of a Linear Ultrasonic Piezoelectric Motor." BYU ScholarsArchive, 2006. https://scholarsarchive.byu.edu/etd/997.

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A new geometrically unique ultrasonic motor (USM) was designed using finite element modeling (FEM). A USM operates by vibrating a drive tip in an elliptical motion while it is in periodic contact with a driven surface. Piezoelectric elements are used to create the elliptical motions and are driven near a resonant frequency to create the needed displacements for the motor to operate. An idea for a motor frame was conceived that consisted of an arch, a center ground, and two piezoelectric elements connected to the center ground. End caps were added between the frame and the piezoelectric element

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50

Hu, Zhaoli. "Analyses and application of piezoelectric actuator in decoupled vibratory feeding." Columbus, Ohio : Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1131113775.

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