Tesis sobre el tema "Piezoelectric actuator"
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Giurgea, Constantin. "Precise motion with piezoelectric actuator". Thesis, University of Ottawa (Canada), 2002. http://hdl.handle.net/10393/6184.
Texto completoQiu, Yan. "Distributed piezoelectric actuator with complex shape". Thesis, Peninsula Technikon, 2002. http://hdl.handle.net/20.500.11838/1263.
Texto completoDistributed 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 the approximate electrical field. And only the rectangular shape DPA has been studied. The accurate distribution and intensity of electrical and mechanics field, and the numerical imitation for the DPA products with rectangular and other shapes have never been discussed and studied. Therefore, the development of DPA to be used in the micro application, such as in the Micro Electro-Mechanical System (MEMS), has been limited. This thesis has developed the analytical analysis models for two types of DPA elements and the part circular shape DPA element. The MathCAD and MATLAB program have been used to develop the analytical models. The ABAQUS program has also been used to compare the results between the analytical models and Finite Element Method (FEM). Finally, the accuracy and reliability of analytical models have been proved by results comparison between the analytical models, FEM and the product testing data from the industry. This thesis consists of five chapters. Chapter 1 is the introduction of smart structure. The characterizations of constituent materials, including the piezoelectric material and matrix epoxy material have been discussed in Chapter 2. In Chapter 3, the analytical models for two type of DPA element have been developed and the comparisons have also been completed. The analytical models for part circular shape DPA element have been developed in Chapter 4. The conclusions and recommendations are included in Chapter 5.
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.
Texto completoFu, Bo. "Piezoelectric actuator design via multiobjective optimization methods". kostenfrei, 2005. http://ubdata.uni-paderborn.de/ediss/10/2005/fu/.
Texto completodeSa, Johann Lec Ryszard. "Manipulation of microparticles using a piezoelectric actuator /". Philadelphia, Pa. : Drexel University, 2009. http://hdl.handle.net/1860/3197.
Texto completoTuncdemir, Safakcan. "Design Of Mini Swimming Robot Using Piezoelectric Actuator". Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605682/index.pdf.
Texto completoHolmes, 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.
Texto completoHu, 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.
Texto completoVinge, 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.
Texto completoPiezoelectric 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. Needed specifications are found and a mechanical setup is designed. Basic theory on piezoelectricity is presented, along with the setup and equipment used for the thesis. Several experiments are designed and conducted in order to identify the linear dynamics and nonlinear properties of the piezoelectric tube. The results are discussed and related to current literature. This includes the linear frequency responses from applied voltage to displacement of the piezoelectric tube, noise levels and nonlinear properties such as displacement creep and hysteresis. Generally, the results are found to closely match what has been found in similar research, although there are some notable differences, such as a somewhat smaller low frequency gain and a much lower resonant peak frequency of the system. Several possible explanations for these disparities are discussed. Both a capacitive sensor and a piezoelectric strain voltage sensor are utilized for measuring displacement. It is found that the capacitive sensor has a higher noise level but is more accurate at lower frequencies than the strain voltage sensor. The two measurements are then combined into an improved estimate of the displacement of the piezoelectric tube.
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.
Texto completoChi, Zi Qiang. "Fuzzy feedback control of piezoelectric actuator with feedforward compensation". Thesis, University of Macau, 2015. http://umaclib3.umac.mo/record=b3335773.
Texto completoDavis, Brandon Witt. "Constitutive behavior and reliability of actuator materials". Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/17856.
Texto completoHa, Kwangtae. "A Combined Piezoelectric Composite Actuator and Its Application to Wing/Blade Tips". Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/7575.
Texto completoSwathanthira, Kumar Murali Murugavel Manjakkattuvalasu. "Implementation of an actuator placement, switching algorithm for active vibration control in flexible structures". Link to electronic thesis, 2002. http://www.wpi.edu/Pubs/ETD/Available/etd-1120102-210634.
Texto completoKeywords: Actuator placement algorithm; piezoelectric actuators; LQR; Galerkin; supervisory control; active vibration control; FEA; switching policy; dSPACE. Includes bibliographical references (p. 58-64).
Juuti, J. (Jari). "Pre-stressed piezoelectric actuator for micro and fine mechanical applications". Doctoral thesis, University of Oulu, 2006. http://urn.fi/urn:isbn:9514279891.
Texto completoTzianetopoulou, Theodora 1974. "Design of an improved piezoelectric actuator for helicopter rotor control". Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/82197.
Texto completoNickless, Benjamin John. "Dynamic modeling and position control of a piezoelectric flextensional actuator". College Park, Md.: University of Maryland, 2008. http://hdl.handle.net/1903/8970.
Texto completoThesis research directed by: Dept. of Aerospace Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Mehta, Parikshit. "Vibrations of thin plate with piezoelectric actuator theory and experiments /". Connect to this title online, 2009. http://etd.lib.clemson.edu/documents/1263400450/.
Texto completoMtawa, 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.
Texto completoIn 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 the individual layers of the C-shape piezocomposite for its optimal performance as an actuator. Analytical models have. been used to optimize the geometry of the actuator. Experimental and finite element analyses (using general purpose finite element software i.e. CoventerWare and MSC. Marc) have been used for validation. The present work has established that, by maintaining the thickness of the substrate and piezoceramic layers constant; changing the external radius, for example increasing it, the stiffness of the structure decreases and thus yielding large displacement This has a negative effect on the force produced by the actuator. With fixed thickness of the substrate and varying the thickness of the piezoceramic (for fixed external radius) the result is as follows: Increasing the thickness of the piezoceramic layer has the effect of decreasing the displacement while the force increases. With fixed PZT thickness as well as the external radius, varying the substrate thickness has the following effect: As the thickness of the substrate increases the displacement increases reaching a maximum. Subsequent increase in the thickness of the substrate the displacement is reduced. The force continues increasing at least for the ratios up to 1.0, further increase of the substrate, subsequent decrease of force is also noted. In addition to changing the thickness of the substrate, the choice of different material for the substrate has the following effect: For substrate/PZT ratios of up to 0.6. an actuator with substrate material having higher elastic modulus will produce larger displacement while for ratios beyond this ratio the situation is reversed. The causes for this kind of behaviour have been addressed. In all cases both force and displacement are found to be directly proportional to applied voltage.
Bhargava, Adesh. "Experimental/analytical determination of optimal piezoelectric actuator locations on complex structures based on the actuator power factor". Thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-08222009-040530/.
Texto completoSharp, Scott L. "Design of a Linear Ultrasonic Piezoelectric Motor". BYU ScholarsArchive, 2006. https://scholarsarchive.byu.edu/etd/997.
Texto completoBéchet, Antoine. "Ultrasonic detection of debonding within a gradient enhanced piezoelectric actuator (GEPAC)". Thesis, Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/17914.
Texto completoMali, Girish Suresh. "Novel Escapement Mechanism using a Compliant Mechanism and a Piezoelectric Actuator". Digital WPI, 2007. https://digitalcommons.wpi.edu/etd-theses/1110.
Texto completoTorres, James Ph D. Massachusetts Institute of Technology. "Harmonic poly-actuator : design and control of a new piezoelectric mechanism". Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/101538.
Texto completoCataloged from PDF version of thesis.
Includes bibliographical references (pages 127-132).
Piezoelectric devices, e.g. piezoelectric stack actuators, have several salient features inherent to their structure. They are efficient, have a high bandwidth, and their capacitive loading allows for static loads to be maintained with virtually no power consumption. The major preventative drawback that limits more widespread use is the small strain, on the order of 0.1%. For marco-scale applications, the displacement must be amplified, typically through mechanical or frequency leveraging. Both have inherent limitations: mechanical devices can increase the stroke but is naturally limited; and frequency devices relies on friction and is limited to nanopositioning. In this thesis, we investigate combining a unique mechanical amplification with a frequency amplification device that does not rely on friction to produce an arbitrarily large stroke linear actuator. The first stage of amplification aims to achieve the greatest displacement amplification without sacrificing force capabilities. The second stage relies on the coordinated actuation of multiple copies of the mechanically amplified device to produce a long stroke, smooth force poly-actuator. The theoretical design concepts for each stage of amplification are explicitly derived. The mechanical amplification device uses rolling contact joints to maintain stiff connections to transmit the force without losses due to friction; and the frequency amplification uses a sinusoidal Transmission interface to exploit a passive balancing of undesirable non-linearities, proven by harmonic analysis. A unique control algorithm is developed to produce a wide variety of capabilities. The theoretical findings are supported by experimental prototypes. The mechanical amplification device produces a comparable energy density while amplifying the displacement by an additional factor 10. The proof-of-concept poly-actuator prototype can continually produce +/-100 Newtons of force over a stroke of 200 mm. We conclude with simulations, which are verified through physical experiments, used to estimate several performance metrics for comparison.
by James Torres.
Ph. D.
Prechtl, Eric Frederick. "Development of a piezoelectric servo-flap actuator fro helicopter rotor control". Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/11731.
Texto completoOliveira, Éder Luiz. "Application of piezoelectric materials as sensor and actuator for aeroelastic investigation". Instituto Tecnológico de Aeronáutica, 2014. http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=3038.
Texto completoJia, Jianhu. "Optimization of piezoelectric actuator systems for vibration control of flexible structures". Diss., Virginia Tech, 1990. http://hdl.handle.net/10919/39754.
Texto completoPh. D.
Stander, Cornelius Johannes. "The passive control of machine tool vibration with a piezoelectric actuator". Diss., University of Pretoria, 2000. http://hdl.handle.net/2263/23038.
Texto completoDissertation (M Eng (Mechanical Engineering))--University of Pretoria, 2000.
Mechanical and Aeronautical Engineering
unrestricted
Wilhelms, John y Marcus Trulsson. "Open Loop Control of Piezoelectric Cantilever Speaker". Thesis, Linköpings universitet, Reglerteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-122363.
Texto completoGex, 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.
Texto completoBerthelot, Committee Chair; Lynch, Committee Member; Jacobs, Committee Member. Includes bibliographical references (leaves 111-113).
Wu, Ze Yi. "Design and implementation of compact micro- nano-positioning stage driven by piezoelectric actuator". Thesis, University of Macau, 2018. http://umaclib3.umac.mo/record=b3950618.
Texto completoSmith, Byron Fitzgerald. "Development and Characterization of a Mechanically Prestressed Piezoelectric Composite". VCU Scholars Compass, 2008. http://scholarscompass.vcu.edu/etd/869.
Texto completoNguyen, Van Ky Quan. "PIEZOELECTRIC ACTUATOR DESIGN OPTIMISATION FOR SHAPE CONTROL OF SMART COMPOSITE PLATE STRUCTURES". University of Sydney. Aerospace, Mechanical and Mechatronic, 2005. http://hdl.handle.net/2123/652.
Texto completoHeadings, 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.
Texto completoMorrisette, Jennifer A. "The use of a piezoelectric actuator to improve precision of a coordinate measurement machine". Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/17044.
Texto completoOhka, Masahiro, Yasuhiro Sawamoto, Shiho Matsukawa, Tetsu Miyaoka y Yasunaga Mitsuya. "A Two-axis Bimorph Piezoelectric Actuator for Pressure and Slippage Force Presentation". IEEE, 2006. http://hdl.handle.net/2237/9501.
Texto completoZai, Marvin Ho-Ming. "Chemical synthesis of lead zirconate titanate thin films for a piezoelectric actuator". Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367760.
Texto completoNguyen, Van Ky Quan. "PIEZOELECTRIC ACTUATOR DESIGN OPTIMISATION FOR SHAPE CONTROL OF SMART COMPOSITE PLATE STRUCTURES". Thesis, The University of Sydney, 2005. http://hdl.handle.net/2123/652.
Texto completoLiao, Ching-mao y 廖景茂. "Tripod Type Piezoelectric Actuator". Thesis, 2006. http://ndltd.ncl.edu.tw/handle/46494918518333994767.
Texto completo正修科技大學
機電工程研究所
94
In this paper, a tripod type piezoelectric actuator with low rotational speed and high torque was discussed. The tripod type piezoelectric actuator consists of three piezoelectric legs and a base. Its dimensions and net weight was 82mm×73mm×57mm and 116 (gw). In addition,its maximum cw. rotational speed was 88.7 rpm under 100 Vp-p driving voltage, 49.4 kHz driving frequency and 140 (gw) loading. Its ccw. rotational speed was 59.8 rpm under 100Vp-p driving voltage, 49.78 kHz driving frequency and 140 (gw) loading. In addition, its maximum loading was 1390 (gw) under 100 Vp-p driving voltage, 49.4 kHz driving frequency and 34.4 rpm cw. rotational speed. And the maximum loading was 1340 (gw) under 100 Vp-p driving voltage, 49.78 kHz driving frequency and 25 rpm ccw. rotational speed.
Raghuvanshi, Digvijay Singh. "Novel actuation techniques for piezoelectric tube actuators". Thesis, 2018. http://hdl.handle.net/1959.13/1393703.
Texto completoPiezoelectric tube actuators are widely used in applications such as fibre optics alignment, endoscopy imaging and scanning probe microscopy. Piezoelectric tubes are thin-walled cylinders of radially poled piezoelectric ceramics. In almost all applications, the tube is fixed at one end and free at the other. A conventional tube in atomic force microscopy consists of quartered outer electrodes, which cover two-thirds of the length for lateral actuation. The remaining one-third of the length is covered by a circumferential electrode for vertical actuation. The inner surface is covered by a continuous electrode grounded at all times. For lateral actuation (bending) along the X or Y-direction, two outer quartered electrodes on opposite sides are driven by voltages of equal magnitude but opposite polarity. Voltage applied to the top circumferential electrode produces vertical actuation. The simplest way to increase the scan range of a piezoelectric tube actuator is to increase its length. However, this increases the physical size and reduces the resonance frequency. This thesis describes a new method for increasing the vertical scan range by driving the internal electrode rather than grounding it. This approach eliminates the need for a circumferential Z-electrode, which is typically one-third of the tube length, thereby allowing longer quadrant electrodes for larger lateral scan range. Since the proposed technique does not change the physical size of the tube, it is ideal for compact applications. Experimental results show a 62% increase in lateral scan range and an 86% increase in vertical scan range with negligible increase in cross-coupling. Analytical modelling shows that driving the internal electrode does not interfere with the lateral scan range. This thesis also proposes to implement similar technique for an eight-electrode tube actuator to compensate for angular (tilting) and vertical cross-coupling. The conventional quartered electrodes are split into two vertical segments of equal length to create a total of eight electrodes. The tilting and vertical cross-coupling due to the lower segments is compensated by the upper segments giving a sigmoid shape to the tube during lateral motion. Finite element simulations and experimental results confirm a 96% decrease in tilt angle and 43% reduction in vertical cross-coupling. However, the trade-off encountered with this method is a 44% decrease in lateral scan range.
Lin, Hung-Pin y 林鴻賓. "Piezoelectric Actuator Modeling and Parameters Identification". Thesis, 2003. http://ndltd.ncl.edu.tw/handle/87773726283844196058.
Texto completo國立清華大學
動力機械工程學系
91
For the purpose of understanding the physical and chemical properties of the nano material as well as performing processing work on it, a manipulator with accuracy in the nano meter range is absolutely necessary. Typically, these nano-scale manipulators are driven piezoelectric actuators. Regardless of the advantages such as lightweight, fast response and high resolution, the piezoelectric actuator also exhibits hysteresis behavior which will seriously limit its performance. In order to achieve more precise control on the piezoelectric actuator, this research is devoted to identifying the hysteresis and developing an algorithm to eliminate the positioning error caused by such an effect. Particularly, we utilize the Maxwell model and Bond-Graph representation to model hysteresis and use the experimental data to estimate the parameters in the model. The model acquired is then used to design a feedforward control so that the piezoelectric actuator can have better positioning performance even when controlled in the open-loop manner.
Eddy, David. "Piezoelectric tool actuator for precision turning". Thesis, 1999. http://hdl.handle.net/2429/9290.
Texto completoHou, Bing-Kuan y 侯秉寬. "Power Driver Design for Piezoelectric Actuator". Thesis, 2008. http://ndltd.ncl.edu.tw/handle/46762699790486168925.
Texto completo中原大學
機械工程研究所
96
In this thesis, designing a power driver based on Class-D amplifier for piezoelectric actuator is the primary goal. Self oscillating PWM modulation is constructed with error amplifier, comparator, feedback controller, digital buffer, and level shifter. This modulation is able to convert analog signal to digital signal by switching signals in the feedback with no need of extra switching signals. Power amplifier modulation is composed of power drive and power amplifier, which makes use of switched-mode technique in order to gain higher power efficiency. Filter modulation is designed based upon the Butterworth filter associated with the characteristics of capacitive load of piezoelectric actuator. Such filter modulation can attenuate high-frequency synthesized signal so as to restore its original waveform efficiently. Finally, function test and performance evaluation is carried out in experiment.
YOUNG, SHIN WEN y 楊實文. "Piezoelectric Inkjet Head- Design and Fabrication of Micro Array Piezoelectric Actuator". Thesis, 2003. http://ndltd.ncl.edu.tw/handle/14146311682979223353.
Texto completo大葉大學
機械工程學系碩士班
91
With the development of inkjet printing application technology, the inkjet print-head is not only occupying the traditional office printing market, but also making us to focus on it’s application, such as new organic/polymer lighting emitting display, optical communication devices, and MEMS devices, and engine technology etc. In many kinds of inkjet printing technology, the most favor type of inkjet printing technology is the piezoelectric driven printing technology. This study uses finite elements code, ANSYS, to analyze and design an actuator of a new type of shear mode piezoelectric ink jet head. Base on the actuated displacement and stoke volume change, the newly designed actuator model was optimized. The advantage of the model is use the most developed technology of making piezoelectric bulk. The piezoelectric actuator is poled by surface poling process, and owned different poling direction in the same piezoelectric material. Using electroplate process to fabricate a vibration membrane. Bonding both by epoxy and cutting the modulus by dicing saw. Measure the modulus properties such as displacement and compare with numerical simulation.
Hew, Kok-Foong y 丘國鋒. "Analysis and Design of a Piezoelectric Actuator". Thesis, 2005. http://ndltd.ncl.edu.tw/handle/70796863055314607043.
Texto completo國立臺灣大學
工程科學及海洋工程學研究所
93
The primary aim of the research is to provide a comprehensive design process of the piezoelectric device. This simulation is based on Mason equivalent circuit model and transfer matrix method. Besides, the Smith chart, Return Loss and Transducer Loss have been carried out. The theory is applied to a piezoelectric device which excite 1.064μm acoustic wavelength to propagate in the substrate, three different materials of substrate have been chosen in the discussion. By using the Matlab simulation, several important factors including the influence of the bonding layer that affects the performance of piezoelectric transducers have been studied. Furthermore, the designs of matching network will be discussed. Finally, a piezoelectric device’s design procedure to offer a systematic way for the optimum designs of piezoelectric devices is presented.
Huang, Ji-Wei y 黃紀威. "Fuzzy Control of a Piezoelectric Actuator System". Thesis, 2008. http://ndltd.ncl.edu.tw/handle/97409940940113150343.
Texto completo國立宜蘭大學
電機工程學系碩士班
96
The purpose of this thesis is to perform the nano-positioning control of a hysteresis system. First, the Bouc-Wen model describes the non-linear hysteresis curve of a piezoelectric actuator. Then, the Takagi-Sugeno (T-S) fuzzy model is applied to approximate the non-linear nano-positioning system. Last, the parallel distributed compensation is designed to control the piezoelectric actuator. Furthermore, the linear matrix inequality (LMI) approach is used to check the stability of fuzzy controller. The optimal parameters of the fuzzy control system are determined by the hybrid Taguchi method and particle swarm optimization.
顧孝鈞. "Fabrication and measurement of micro piezoelectric actuator". Thesis, 2004. http://ndltd.ncl.edu.tw/handle/70671838155185053554.
Texto completo大葉大學
機械工程研究所碩士班
92
The piezoelectric inkjet printhead play an important role in the developing industry of MEMS. The application of inkjet printing is very extensive in many fields. And, its key device, PZT actuator, attracts a lot of research attention and especially in MEMS field. But, up to now the actuating force of PZT actuator is difficult to measure in case of small size PZT in MEMS application. This study focuses on the improvement of piezoelectric characteristic for the actuating module of inkjet printhead. The actuating module consists of the PZT and the vibration plate. The PZT induce the deformation of diaphragm of vibration plate. The actuated out- of-plane displacement was measured by laser vibrometer (Polytec MSV300). And from the measured magnitude of the displacement the actuating force can be derived by numerical method and analytical formula.
Chan, Chin-Hsian y 詹金祥. "Study of Double Disk Type Piezoelectric Actuator". Thesis, 2012. http://ndltd.ncl.edu.tw/handle/01684869356137268956.
Texto completo國立交通大學
工學院精密與自動化工程學程
100
This study proposes an innovative piezoelectric actuator. It has characteristics of large deformation and fast velocity. Under the inertial force and friction influence, the piezoelectric actuator can move rapidly. The piezoelectric actuator can reach 20mm displacement in this experiment. The experiments are carried out in two ways: one is drivien by same-direction voltage to piezoelectric element, which is called A-type. And another one driven by opposite-direction voltage, which is called B-type. The actuator experiments investigate the duty ratio and velocity effects, and the effects of the driving voltage on velocity and force. When the duty ratio is 40% or 60 %, the moving velocity of A-type is the fastest. According to experimental results concerning velocities and forces, A-type exhibits more deformation than B-type, so as to induce higher velocity and force. Therefore, A-type performs better than B-type.
Lai, Jun-An y 賴俊安. "Two-Stage Driver Design for Piezoelectric Actuator". Thesis, 2004. http://ndltd.ncl.edu.tw/handle/qmkd88.
Texto completo中原大學
機械工程研究所
92
A driver for piezoelectric actuator for high and low range of frequency application is investigated. The first stage of the driver is boost DC converter associated with the full-bridge circuitry in the second stage. In low operating frequency, switching control with sinusoidal pulse width modulation (SPWM) is used in full-bridge circuitry, which converts the high voltage DC signal provided in the first stage into AC low frequency signal to drive the piezoelectric actuator. In high operating frequency, switching control with programmable pulse width modulation (PWM) is used in full-bridge circuitry in association with the high-voltage and high-frequency signal generated by the resonance circuitry. Single-chip microprocessor is used to design the programmable operating frequency with digital control method to accurately achieve the purpose.
Shiu, Shih-je y 徐士哲. "Design of A Driver for Piezoelectric Actuator". Thesis, 2010. http://ndltd.ncl.edu.tw/handle/06855730945517404806.
Texto completo國立中正大學
機械工程所
98
In this thesis, we analyze the circuit of power amplifiers in the market, understand the working principle of the circuit, and use computer simulation to verify its correctness. Piezoelectric actuator driving circuit is divided into the power stage and the control stage. Part of the power stage is composed of half-bridge inverter and LC output filter. The Sigma-Delta Modulation is adopted to control the piezoelectric actuator.