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Relevant bibliographies by topics / Piezoelectric actuation

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Academic literature on the topic 'Piezoelectric actuation'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Piezoelectric actuation"

1

Yoon, Kwang Joon, J. D. Lee, K. B. Kim, Hoon Cheol Park, and Nam Seo Goo. "Design and Manufacturing of IDEAL with Stacked Ceramic Layers and Inter-Digitated Electrodes." Key Engineering Materials 306-308 (March 2006): 1175–80. http://dx.doi.org/10.4028/www.scientific.net/kem.306-308.1175.

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This paper is concerned with the development of stacked ceramic thin actuation layer IDEAL (Inter-Digitated Electrode Actuation Layer) using d33 actuation mechanism of piezoelectric ceramic. Most of the thin piezoelectric actuators are operated with d31 actuation mechanism. Many kinds of piezoelectric ceramic actuators are strived now to improve the actuation performance. One of efforts to improve performance of piezoceramic actuators is the research trying to develop an actuator using the piezoelectric coefficient d33. The piezoelectric coefficient d33 is almost twice larger than piezoelectric coefficient d31. Therefore, the induced strain of PZT thin layer with d33 actuation mechanism is bigger than that with d31 actuation mechanism. The AFC and LaRC-MFC used d33 actuation mechanism with surface interdigitated electrode to enhance its actuation performance. But their actuation mechanism is not perfect d33 actuation mechanism since the interdigitated electrodes are placed at the surface of the actuation layer. In this research, the stacked ceramic thin actuation layer with imbedded inter-digitated electrodes is designed and manufactured. The actuation strain of stacked ceramic thin actuation layer is measured and compared with the actuation strain of the LaRC-MFC. The comparison shows that the developed stacked ceramic thin actuation layer can produce 10% more actuation strain than LaRC-MFC at relatively high electric field.

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2

Yu, Yu Min. "Design and Analysis of a Piezoelectric Actuator." Advanced Materials Research 308-310 (August 2011): 2131–34. http://dx.doi.org/10.4028/www.scientific.net/amr.308-310.2131.

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Active materials are a group of solid-state materials whose geometric shape can be related to an energy input in the form of heat, light, electric field, or magnetic field. In the application of active materials to electromechanical energy conversion, electrical energy may be input to the material and the resulting deformation of the material can be used to move a load. The most common active materials used in actuators are piezoelectrics, magnetostrictives, and SMAs. In this paper, a piezoelectric actuation concept is presented that uses a new feed-screw motion accumulation technique. The feed-screw concept involves accumulating high frequency actuation strokes of a piezoelectric stack (driving element) by intermittently rotating nuts on an output feed-screw. The main parts of piezoelectric actuation such as clamp mechanism, rotary mechanism and “L type” driving mechanism are investigated. From the analysis, the deformation and stress of it are all under allowed value of 65Mn. The mathematics model of upside of rotary mechanism rotation motion is established. The results indicate that, the mechanisms of actuator all are satisfy the need of design

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Wang, Wei, Zikuo Zhang, and Zhichun Yang. "Experiment and Modeling on Macro Fiber Composite Stress-Induced Actuation Function Degradation." Applied Sciences 9, no. 21 (2019): 4714. http://dx.doi.org/10.3390/app9214714.

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The effect of stress depolarization will cause actuation function degradation of a piezoelectric actuator, which can eventually trigger function failure of the piezoelectric smart structure system. In the present study, we experimentally demonstrate the degradation process of the actuation function of the Macro Fiber Composite (MFC) piezoelectric actuator. Actuation function degradation data of MFC actuators undergoing cyclic loads with four different stress amplitudes have been measured. Based upon the experimental results, the radial basis function (RBF) neural network learning algorithm was adopted to establish a neural network model, in order to predict the actuation function degenerative degree of the MFC actuator, undergoing arbitrary cyclic load within the concerned stress amplitude range. The maximum relative error between the predicted result and our experimental result is 4%.

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Wang, Liang, Bo Hao, Ruifeng Wang, Jiamei Jin, and Qingsong Xu. "A Novel Self-Moving Framed Piezoelectric Actuator." Applied Sciences 10, no. 19 (2020): 6682. http://dx.doi.org/10.3390/app10196682.

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Utilizing the inherent advantages of the piezoelectric driving technology, such as good adaptability to vacuum environment and no electromagnetic interference, a novel self-moving framed piezoelectric actuator is proposed, simulated, and tested in this study, holding a potential application for magnetic confinement fusion. Four piezoelectric composite beams form a framed piezoelectric actuator. Two orthogonal vibration modes are excited and coupled in the framed piezoelectric actuator, producing a microscopic elliptical motion at its driving feet. Due to the friction, the framed piezoelectric actuator can move on a rail, thereby constructing the railed carrying system. Numerical simulation is carried out to confirm the operation principle and to conduct the dimensional optimization of the proposed framed piezoelectric actuator. A prototype of the proposed framed piezoelectric actuator with a weight of 83.8 g is manufactured, assembled, and tested, to verify the piezoelectric actuation concept. The optimal driving frequency of 20.75 kHz is obtained for the proposed actuator prototype, and at the excitation voltage of 400 Vpp its maximum mean velocity of 384.9 mm/s is measured. Additionally, the maximum load weight to self-weight of the proposed actuator prototype reached up to 10.74 at the excitation voltage of 300 Vpp. These experimental results validate the feasibility of the piezoelectric actuation concept on the railed carrying system.

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Ma, X., B. Zhou, and S. F. Xue. "Investigation on Actuation Performance of Continuous Fiber Reinforced Piezoelectric Composite Actuator." Journal of Mechanics 36, no. 3 (2019): 273–84. http://dx.doi.org/10.1017/jmech.2019.42.

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ABSTRACTIn this paper, a novel continuous fiber reinforced piezoelectric composite (CFRPC) actuator is proposed to improve the stability and reliability of piezoelectric actuators. A piezoelectric driving structure composed of a cantilever beam and the CFRPC actuator is utilized to research the actuation performance of the CFRPC actuator. The expression of the equivalent moment for the CFRPC actuator is obtained using the equivalent load method and electro-mechanical coupling theory. Based on Euler-Bernoulli beam theory, the analytical expression of the deflection for the cantilever beam is derived. The accuracy of the obtained analytical expressions is demonstrated by finite element simulation as well as published experimental results. The actuation performance of the CFRPC actuator is investigated through the analytical expressions of the equivalent moment and deflection. The results show that the key parameters such as driving voltage, fiber volume fraction, cantilever beam height, actuator height, actuator length and actuator position have great influence on the actuation performance of the CFRPC actuator. The CFRPC actuator has good mechanical and electrical properties, and has a wide application prospect in the field of structural shape control.

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6

Li, Yongzhe, Vinh Tung Le, Nam Seo Goo, Tae Heun Kim, and Chang Seop Lee. "High actuation force of piezoelectric hybrid actuator with multiple piezoelectric pump design." Journal of Intelligent Material Systems and Structures 28, no. 18 (2017): 2557–71. http://dx.doi.org/10.1177/1045389x17692048.

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The piezoelectric hybrid actuator is a new electro-hydrostatic actuator with broad prospects for development. Compared with the traditional hydraulic pump, the piezoelectric hybrid actuator is characterized by a simple structure, small size, lightweight, and low power. However, it has a well-known weakness: It produces only a small actuation force and then cannot be used in real applications. Because the maximum force produced by a one-piezoelectric pump design cannot be increased much due to limitations in the power supply and piezoelectric materials, researchers have moved to the use of multiple piezoelectric pumps. In this research, a double-piezoelectric pump-hydraulic cylinder hybrid actuator was designed, manufactured, and tested in order to increase the actuation force. Key design factors such as the connection method and driving method were investigated to realize the double-piezoelectric pump design and achieve a high level of performance. A total of three kinds of double-piezoelectric pump-hydraulic cylinder hybrid actuator designs were selected by a theoretical approach and implemented using two identical piezoelectric pumps. A manual valve system was installed for switching the connection method (series and parallel modes). The driving method, phase, or voltage was controlled by a LabVIEW program. The maximum blocking force of 4615 N was measured at 250 Hz for cross driving, series connection and φ30-mm cylinder. The maximum velocity of 68.3 mm/s was measured at 300 Hz for cross driving, series connection and φ21-mm cylinder. Fluid structural interaction analysis using ANSYS software confirmed the experimental results. The performance of double-piezoelectric pump-hydraulic hybrid actuator meets the minimum requirements for mechanical and aerospace actuator applications.

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Lee, Taik Min, Young Ho Seo, Kyung Hyun Whang, and Doo Sun Choi. "Study on the Lateral Piezoelectric Actuator with Actuation Range Amplifying Structure." Key Engineering Materials 326-328 (December 2006): 289–92. http://dx.doi.org/10.4028/www.scientific.net/kem.326-328.289.

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A novel piezoelectric micro-actuator with actuating range amplification structure has been proposed. This actuator is unique in that the leverage type amplification structure enables large actuating movement with low voltage. In case of general piezoelectric thin film actuator, applied voltage is low and almost zero power is consumed. Its switching time is very fast in comparison with electrostatic actuators and thermal actuators. However, the most drawback of piezoelectric actuator is short actuating range. A 100μm length PZT actuator can only make movement of 100. In this research, we suggest an actuator which can provide geometric amplification of the PZT strain displacement in lateral direction. The lateral piezoelectric MEMS actuator was fabricated and its actuating range was measured. The actuator shows maximum lateral displacement of 1.1μm, and break-down-voltage of the thin film PZT actuator is above 16V.

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Liu, Y.-T., and C.-K. Wang. "A study of the characteristics of a one-degree-of-freedom positioning device using spring-mounted piezoelectric actuators." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 223, no. 9 (2009): 2017–27. http://dx.doi.org/10.1243/09544062jmes1422.

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This article presents the actuating performance of a one-degree-of-freedom (DOF) positioning device using spring-mounted piezoelectric (PZT) actuators. To employ a spring with a preset compression, the operational range of a PZT actuator could be simply enlarged, and a sliding table actuated by PZT impact force might feature long stroke and high-precision positioning ability. An experimental set-up consisting of two spring-mounted PZT actuators was configured to examine the actuating characteristics. According to experimental results, a sliding table with a heavy mass of 172 g could be actuated to move with a step motion ranging from 15 nm to 81 μm by only one single actuation of the PZT actuator, and with a maximum travelling speed of 3.47 mm/s by continuous actuation. In addition to experimental examinations, a dynamic model was established and verified as effective in describing the actuating behaviours through numerical examinations.

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Jawaid, Hareem, Waqar Ahmed Qureshi, Riffat Asim Pasha, and Rizwan Ahmed Malik. "Characterization and Mathematical Modelling of Geometric Effects on Piezoelectric Actuators." Integrated Ferroelectrics 201, no. 1 (2019): 201–17. http://dx.doi.org/10.1080/10584587.2019.1668704.

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This paper focuses on the characterization and static structural analysis of piezoelectric actuator to investigate the sequential increasing effect of piezoelectric patches. The effect on the tip deflection is observed analytically, numerically and experimentally. By varying the quantity and the geometry of piezoelectric patches/beams, the actuation effect is analyzed. A mathematical model has been developed for the unequal lengths of patches and beam. The analysis is carried out numerically to examine the tip deflection under various parameters. The results are analyzed and verified experimentally. The results are found to be in accordance with the analytical and numerical results. This permits the desired configuration of an actuator in applications like hydraulic valves for actuating and controlling the flow of liquid as per need.

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Dawood, Mohamed Shaik, L. Iannucci, E. Greenhalgh, and Ahmad Kamal Ariffin. "Low Velocity Impact Induced Delamination Control Using MFC Actuator." Applied Mechanics and Materials 165 (April 2012): 346–51. http://dx.doi.org/10.4028/www.scientific.net/amm.165.346.

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The potential use of MFC actuator as a tool for reducing low velocity impact induced delamination has been investigated using LS-DYNA explicit finite element code. An induced strain piezoelectric actuation model was implemented into LS-DYNA through its user defined material subroutine to simulate the piezoelectric effects while a cohesive based damage model was used to predict delamination. The numerical study confirmed that delamination could be reduced but the MFC required very high actuation voltages even in the case of very low energy impact which is not practically achievable with the existing actuator. Assuming powerful actuators are not something impossible in near future, this study provide useful information for advancing composite impact investigation using piezoelectric actuator as an integrated tool for improving its impact tolerance.

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Dissertations / Theses on the topic "Piezoelectric actuation"

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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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 are two key parameters and the ratio between the two should be larger than 0.15. Switching gaps are chosen as 5m and 7.5m from the designed range of 3 ~ 15m. An equivalent circuit network incorporating a transmission line model of the coupling beam is developed to demonstrate a design method for the mechanical filter. The model reveals that the coupling beam stiffness, coupling position, electromechanical coupling factor and the quality factor of the piezoelectric cantilever have substantial effects on filter characteristics. A narrower/wider bandwidth with higher/lower filter Q can result if the coupling position is near/further to a cantilever's anchor position. Extreme situations of the above two coupling cases result in filter bandwidth's disappearing and filter centre frequency's shifting. For a desired filter insertion loss source and load resistances need to be determined by quality factors of terminal circuit and coupled resonators. A bulk micromachining process compatible with the integration of PZT thin film onto silicon is developed. ln general, for PZT pattern size above 100m wet etching could give satisfactory pattern definition, however for pattern size below 50m dry etching is needed. To etch a thickness 2 1m PZT film long dry etching lime demands for the survivability of a masking material. ln this study a technique combined of dry and wet etching is developed for a 1m PZT film. lt is found that a low pressure promotes a higher etch rate and the best etching conditions are a gas mixture with a composition of 1/4 for CHF3/Ar at a total gas flow of 25sccm under a RF power of 150W. Dry etching is also developed to release cantilevers from the buried S102 layer with conditions of a gas mixture of 13sccm CHF3 and 3sccm 02 at 80mTorr and a RF power of 100W in 30mins for 1m Si02. To be compatible with PZT elements silicon cantilevers are processed using deep reactive ion etching. PZT thin film actuation has been demonstrated successfully with PZI' thin film integrated silicon cantilevers. A static deflection of 2.89m is measured at an actuating voltage of 20V for a 100m wide and 450m long cantilever. A displacement of 556nm at 12.98 kHz resonance is measured for a 200m wide and 850m long cantilever under a 10mV AC plus a 10V DC. A piezoelectric strain constant d31 of 30.15pC/N has been obtained for the PZT thin film used in this study. Filter resonant modes and impedance responses are measured. The filter concept design is justified by the obtained results. Using the impedance data the electromechanical coupling factor, filter centre frequency, filter bandwidth and filter Q are determined. There is a good agreement between the measured and calculated filter centre frequencies. At the first filter resonant mode a maximum piezoelectric coupling factor of 0.19 and a maximum resonator-Q of 235 are recorded. At the second filter resonant mode a maximum of 0.12 and a maximum resonator-Q of 360 are obtained. Results show smaller coupling factors than required at the 13' and 2" centre frequencies for all measured filters. This implies that pass bands of designed filters will be missing from their responses at the 18' and 2" centre frequencies. Design improvements are given in the relevant results discussions. Residual stresses are studied for deflected cantilevers after release. The tensile stress of PZT, the converted tensile stress of Pt and the compressive stress of remaining buried SiO2 layer could result in the upwards-deflected cantilevers. The compressive stress of P could compensate the tensile stress of PZT and flatten the cantilever beam. lf the buried SiO2 layer is removed incompletely or if the tensile stress of PZT layer is very high, then upwards-deflected cantilevers would result. Measurements of the most switch cantilevers show larger initial deflections than the designed switching gaps. Finally, conclusions and suggestions of future work are given.

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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 applications is therefore investigated. Increased efficiency implies that leakage should be small, and other key requirements are reliability, robustness and low manufacturing cost. The aim of this research is to provide background knowledge so that in the future an improved two stage servovalve can be manufactured. The prototype valve in this research will not be lightweight, but will provide knowledge for a future researcher or manufacturer to create a light weight servovalve. A two stage servovalve was designed with a multi-layer piezoelectric ring bender actuating a low leakage small spool as a first stage to control a second stage spool with electrical position feedback. The valve body was manufactured through Additive Manufacturing. A dynamic model of the complete valve was developed and correlated with experimental data. The model included the drive amplifier for the piezoelectric ring bender, the ring bender with hysteresis, first stage spool with overlap and the second stage spool. This showed that hysteresis and overlap had a significant effect on valve behaviour. A second stage spool position controller was developed to counteract the non-linear behaviour due to the piezoelectric hysteresis and the dead-band due to the first stage overlap. The controller also includes a feed forward path to increase the bandwidth of the valve. This controller outperforms a conventional Proportional-Integral controller and is also less sensitive to amplitude change. Mounting a ring bender sufficiently stiffly so that it can generate a high blocking force, but also in such a way that the deformation and hence the free displacement of the ring bender is not constrained, is a significant challenge. An analytical model to optimize the ring bender mount has been developed. This model can be used to find the optimum mount overlap at the outer edge of the ring bender, and the optimum thickness of the mount. An extensive investigation of the durability of the ring bender in Hyjet has been completed. Hyjet is a tradename for a fire-resistant phosphate-ester hydraulic fluid commonly used in civil aerospace. The ring bender will quickly start to break down if the Hyjet reaches the electrical connections. The Hyjet will penetrate the ceramic and create an electrical circuit between the electrical connection, the Hyjet and the outermost internal electrode. The breakdown of the ring bender can probably be eliminated by protecting the ceramic with an impermeable layer of material. In this research a metallic foil applied to the surface of the ring bender was investigated.

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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 research project, the torque motor has been substituted for two piezoelectric ring bender actuators. A novel mounting mechanism has been developed to secure the ring benders within the valve. Analytical and finite element models have been made to understand the displacement mechanism of a ring bender and the effects of the mount on the displacement and force from a ring bender, and the results were compared with experiment. The mounting stiffness at the inner and outer edges was found to decrease the displacement of the ring bender and it was found that the stiffness of the mount at the outer edge has a greater negative effect on displacement than the stiffness of the mount at the inner edge. The displacement of a ring bender was tested across the operational temperature range of an aero engine. It was found that the displacement of the ring bender is reduced at low temperatures and increases at high temperature. The variation of stiffness of the elastomeric mount was also tested with temperature and it was found that the displacement of a ring bender is significantly reduced when the mounting elastomer approaches its glass transition temperature. A prototype valve was built to test the pressures and flows that could be achieved at two control ports by using a ring bender as actuator. A single ring bender and two ring benders, mounted in tandem to provide redundancy, have been tested. An analytical model was developed and the predictions are compared with experimental results for pressures and flow. The full stroke of the valve was 300m when mounted and reduced to 150m when mounted in tandem with an inactive ring bender. The hysteresis of the valve is +/-10%. The pressures and flow at and between the control ports of the valve are consistent with the predictions.

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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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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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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 characteristics of the actuator such as radius of curvature and force output. ECLIPSE actuators were characterized during this study. They were made from layers of Kevlar 49/epoxy composite and a lead zirconate titanate ceramic (PZT) plate. All ECLIPSE actuators tested were built with a PZT plate with the same dimensions and material, but had different layup configurations. By changing the stacking order of the composite and PZT material, characteristics of the actuator were altered. The performance of each ECLIPSE actuator was compared. The maximum achievable displacement of each actuator was measured by cyclically applying an electric field at low frequency between zero and the maximum electric field allowable for the piezoelectric material. The frequency was also increased to a resonance condition to characterize the fatigue behavior of these actuators. In addition, the force output of various actuators was measured with a four-point bending apparatus. The experimental data was compared to a classical lamination theory model and an extended classical lamination theory model. These models were used to predict actuator behavior as well as to calculate the stress and strain distribution through the thickness of the actuator.

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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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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 harvesting into actuator design using prestressed piezoelectric composites. Four state-of-the-art piezoelectric composites were chosen as active diaphragms in synthetic jet actuators. These composites not only overcome the inherent brittle and fragile nature of piezoelectric materials but also enhance domain movement which in turn enhances intrinsic contributions. With these varying characteristics among different types of composites, the intricacies of the synthetic jet design and its implementation increases. In addition the electrical power requirements of piezoelectric materials make the new SJA system a coupled multiphysics problem involving electro–mechanical and structural–fluid interactions. Due to the nature of this system, a design of experiments approach, a method of combining experiments and statistics, is utilized. Geometric and electro-mechanical factors are investigated using a fractional factorial design with peak synthetic jet velocity as a response variable. Furthermore, energy generated by the system oscillations is harvested with a prestressed composite and a piezo-polymer. Using response surface methodology the process is optimized under different temperatures and pressures to simulate harsh environmental conditions. Results of the fractional factorial experimental design showed that cavity dimensions and type of signal used to drive the synthetic jet actuator were statistically significant factors when studying peak jet velocity. The Bimorph (~50m/s) and the prestressed metal composite (~45m/s) generated similar peak jet velocities but the later is the most robust of all tested actuators. In addition, an alternate input signal to the composite, a sawtooth waveform, leads to jets formed with larger peak velocities at frequencies above 15Hz. The optimized factor levels for the energy harvesting process were identified as 237.6kPa, 3.7Hz, 1MΩ and 12°C and the power density measured at these conditions was 24.27µW/mm3. Finally, the SJA is integrated with an energy harvesting system and the power generated is stored into a large capacitor and a rechargeable battery. After approximately six hours of operation 5V of generated voltage is stored in a 330µF capacitor with the prestressed metal composite as the harvester. It is then demonstrated that energy harvested from the inherent vibrations of a SJA can be stored for later use. Then, the system proposed in this dissertation not only improves on the efficiency of aerodynamic bodies, but also harvests energy that is otherwise wasted.

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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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Books on the topic "Piezoelectric actuation"

1

Heeg, Jennifer. Analytical and experimental investigation of flutter suppression by piezoelectric actuation. Langley Research Center, 1993.

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Holmes, James E. Novel piezoelectric structures for sensor and actuator applications. University of Birmingham, 2002.

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Center, Langley Research, ed. Flutter suppression via piezoelectric actuation. National Aeronautics and Space Administration, Langley Research Center, 1991.

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McLean, Clayton. A hierarchical theory for layered beams with piezoelectric actuation. 2004.

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An analytical and experimental investigation of flutter suppression via piezoelectric actuation. National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program, 1993.

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Center, Langley Research, ed. An analytical and experimental investigation of flutter suppression via piezoelectric actuation. National Aeronautics and Space Administration, Langley Research Center, 1992.

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United States. National Aeronautics and Space Administration., ed. An analytical and experimental study to investigate flutter suppression via piezoelectric actuation. National Aeronautics and Space Administration, 1991.

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C, Park K., and Langley Research Center, eds. An aeroelastic analysis of helicopter rotor blades incorporating piezoelectric fiber composite twist actuation. National Aeronautics and Space Administration, Langley Research Center, 1996.

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Perel, Victor Y. Nonlinear Dynamics of Composite Delaminated Beam with Piezoelectric Actuator. Trafford, 2003.

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10

Hagood, Nesbitt W. Modelling of piezoelectric actuator dynamics for active structural control. 1990.

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Book chapters on the topic "Piezoelectric actuation"

1

Silva, Emílio Carlos Nelli. "Synthesis with Piezoelectric Actuation." In Microsystems. Springer US, 2003. http://dx.doi.org/10.1007/978-1-4615-0487-0_5.

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Xu, Jie, and Daniel Attinger. "Piezoelectric Actuation in Multiphase Microfluidics." In Encyclopedia of Microfluidics and Nanofluidics. Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4614-5491-5_1766.

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Xu, Jie, and Daniel Attinger. "Piezoelectric Actuation in Multiphase Microfluidics." In Encyclopedia of Microfluidics and Nanofluidics. Springer US, 2013. http://dx.doi.org/10.1007/978-3-642-27758-0_1766-3.

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Ashida, Fumihiro. "Piezoelectric Actuation: Control of Thermal Stress." In Encyclopedia of Thermal Stresses. Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-2739-7_325.

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Kluge, S., G. Neumayer, U. Schaber, et al. "Pneumatic Silicon Microvalves with Piezoelectric Actuation." In Transducers ’01 Eurosensors XV. Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-59497-7_212.

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Adali, Sarp, Ismail Kucuk, and Ibrahim S. Sadek. "Piezoelectric Actuation: Control of Linear Thermal Vibrations." In Encyclopedia of Thermal Stresses. Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-2739-7_318.

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Ashida, Fumihiro. "Piezoelectric Actuation: Adaptive Control of Thermal Displacement." In Encyclopedia of Thermal Stresses. Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-2739-7_322.

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Ashida, Fumihiro. "Piezoelectric Actuation: Control of Linear Thermal Displacement." In Encyclopedia of Thermal Stresses. Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-2739-7_323.

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Maurini, C., Joel Pouget, and Stefano Vidoli. "Bistable Buckled Beam: Modelling and Piezoelectric Actuation." In Advances in Science and Technology. Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/3-908158-11-7.281.

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Lee, Taik Min, Young Ho Seo, Kyung Hyun Whang, and Doo Sun Choi. "Study on the Lateral Piezoelectric Actuator with Actuation Range Amplifying Structure." In Experimental Mechanics in Nano and Biotechnology. Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-415-4.289.

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Conference papers on the topic "Piezoelectric actuation"

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Liu, Fei, Josh Hogue, William Oates, John Solomon, and Farrukh Alvi. "Piezoelectric Controlled Pulsed Microjet Actuation." In ASME 2009 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2009. http://dx.doi.org/10.1115/smasis2009-1448.

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A piezohydraulic actuator has been designed and tested for broadband flow control of a microjet actuator. This actuator is under development to understand fundamental flow characteristics near a pulsed flow microjet for active flow control on a number of aircraft structures including impinging jets, cavities, and jet inlets. Recent research has shown substantial reductions in flow separation and noise reduction using steady blowing microjets. This approach often leads to inefficiencies due to excessive mass flux that is typically bled off of an aircraft compressor. Reductions in mass flux without performance losses are desired by actively pulsing the microjet. A piezohydraulic actuator design is presented to investigate this concept. The actuator includes a piezoelectric stack actuator and hydraulic circuit to achieve sufficient displacement amplification to throttle a 400 μm diameter microjet. This system is shown to provide broadband pulsed flow actuation up to 900 Hz. Key parameters contributing to dynamic actuation are shown to include hydraulic fluid behavior, biased microjet air pressure, and voltage inputs to the stack actuator.

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van Hulzen, J. R., G. Schitter, P. M. J. Van den Hof, and J. van Eijk. "Load dynamics in piezoelectric actuation." In 2009 European Control Conference (ECC). IEEE, 2009. http://dx.doi.org/10.23919/ecc.2009.7075194.

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Jiang, Jing, Zong-Quan Deng, Hong-Hao Yue, Lei Wang, and Horn-Sen Tzou. "Research on Constitutive Model of Hybrid Photovoltaic/Piezoelectric Actuation Mechanism." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-37199.

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Opto-mechanical actuators do not require hard-wired connections to control light source. Accordingly, the control commands will not be influenced by undesirable electric noises. Without accessorial devices and connecting wires, photonic control which conforms to the lightweight trend of space structure has great research value. PLZT photostrictive actuator can only induce actuation strain along its polarized direction, so it has the deficiency of one-way actuation. In this paper, the novel hybrid photovoltaic/piezoelectric actuation mechanism is proposed to remedy this deficiency. The ultraviolet light-driven PLZT induced voltages are used to drive piezoelectric actuator. Based on the equivalent electrical model, constitutive model is established to define the time history of actuation strain of piezoelectric actuator driven by photovoltage. Experimental platform is established to verify this established constitutive model. A logical switch is designed to realize positive and negative connection switch between PLZT photovoltaic generator and piezoelectric actuator. It is experimentally validated that the piezoelectric actuator can induce both positive and negative control forces.

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Zhou, Xu, and Aditi Chattopadhyay. "Nonlinear Piezoelectric Constitutive Relationship and Actuation for Piezoelectric Laminates." In 43rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. American Institute of Aeronautics and Astronautics, 2002. http://dx.doi.org/10.2514/6.2002-1438.

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Tzou, H. S., and J. P. Zhong. "Distributed Orthogonal Filtering of Piezoelectric Shell Actuators." In ASME 1993 Design Technical Conferences. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/detc1993-0220.

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Abstract Distributed control of elastic shell continua using spatially distributed piezoelectric actuators is proposed and a generic distributed velocity feedback algorithm with a spatial modal feedback function formulated. The generic distributed modal feedback function is further represented by a gain factor and a spatially distributed orthogonal (mode shape) function to achieve independent modal actuation capability. Based on this principle, distributed piezoelectric actuators can be spatially shaped to emulate the spatial orthogonal actuation of the distributed modal feedback function. Distributed orthogonal shaped modal actuators for ring shells are proposed and their modal actuations demonstrated. Analyses suggested that the primary control action came from the in-plane membrane (circumferential) forces and that contributed by the bending control moment is relatively insignificant for lower natural modes. Control effects due to thickness variation of the ring shell and the actuator are also investigated.

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Kim, Jun-Sik, K. W. Wang, and Edward C. Smith. "Design and Analysis of Piezoelectric Transducer Based Resonant Actuation Systems." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-80335.

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The objective of this research is to address some of the important design issues of the recently developed piezoelectric resonant actuation system (RAS) concept. The RAS is achieved through both mechanical and electrical tailoring. With mechanical tuning, the resonant frequencies of the actuation system (includes the piezoelectric actuator and the related mechanical and electrical elements for actuation) can be adjusted to the required actuation frequencies. This obviously will increase the authority of the actuation system. To further enhance controllability and robustness, the actuation resonant peak can be significantly broadened and flattened with electrical tailoring through the aid of an electric network of inductance, resistance, and negative capacitance. Therefore, one can achieve a high authority actuator without the negative effects of resonant systems. In this investigation, the RAS is analyzed and compared to an equivalent mechanical system to provide better physical understandings. Design guidelines of the RAS are derived in a dimensionless form, and the optimal values of the electrical components are explicitly determined. A method of implementing the actuator circuitry is proposed and realized via a digital signal processor (DSP) system. Performance of the resonant actuation system is analyzed and verified experimentally on a full-scale piezoelectric tube actuator for light class helicopter rotor control. The electric power consumption of the RAS is analyzed and discussed in terms of the power factor and apparent power. It is demonstrated that a piezoelectric resonant actuation system with proper tunings not only yields high authority with a broad frequency bandwidth but also is electrically efficient in terms of power consumption.

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Hariri, M., S. John, and P. Trivailo. "Modelling Piezoelectric Actuation During Structural Flutter." In ASME 2009 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2009. http://dx.doi.org/10.1115/smasis2009-1250.

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Aeroelasticity is a major concern in structural control. It results from the interaction between the air-stream and the structure. Wing flutter is a well known problem of the aero-elasticity. It occurs when the two lowest system eigenvalues (plunge and pitch motion) coalesce at a certain air speed known as the flutter speed. The increasing use of active material induced-strain actuation such as piezoelectric materials in the suppression of structural vibrations has seen its extension to wing flutter control. Higher flutter speed and hence, a wider operating envelope was achieved by delaying the coalescence of these two eigenvalues. This delay is obtained by adding more strain energy to the system as a result of the activation of the piezoelectric actuators. This paper models a simple beam under nominal aerodynamic loading conditions for the determination of analytically-derived onset of flutter speeds. Also shown in this paper, is the effect of orientation of actuated piezoelectric patches, on the shift of the flutter speed.

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Lieven, Nicholas A. J. "Piezoelectric actuation of helicopter rotor blades." In SPIE's 8th Annual International Symposium on Smart Structures and Materials, edited by Daniel J. Inman. SPIE, 2001. http://dx.doi.org/10.1117/12.432727.

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Tadesse, Yonas, and Shashank Priya. "Humanoid Face Utilizing Rotary Actuator and Piezoelectric Sensors." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-66860.

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Mimicking facial structure for a robotic head is a challenging issue and requires information on design and control of muscle actuation, architecture of the linkages between actuation points within skin, and deformation matrix with respect to global coordinates for a specific expression. This manuscript presents: (1) a functional relationship between deformation vector of facial control points and actuator parameter, skin elasticity and angular position of actuator. The actuation method is applicable to any rotary actuator technology utilized for facial expressions and takes into account the skin stiffness; (2) a prototype robotic head with embedded sensor to enhance interaction ability of humanoids; and (3) characterization of various facial expressions on a prototype robotic face.

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Kang, Lae-Hyong, and Jae-Hung Han. "Performance Evaluation of the Pre-Stressed Piezoelectric Unimorph Using Nonlinear Piezoelectric Properties." In ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2010. http://dx.doi.org/10.1115/smasis2010-3650.

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Piezoelectric actuators operate when the electric field (voltage) is applied to them. This piezoelectric behavior is defined using piezoelectric strain coefficients which are generally assumed to be constant. However, when high electric fields are applied to the piezoelectric actuators the piezoelectric strain constant may increase up to more than twice of the nominal value and, thus, cannot be considered as a constant value. Besides, in case of the pre-stressed piezoelectric unimorph actuators, the stress conditions inside piezoelectric actuators can affect piezoelectric behaviors. For reasons mentioned above, actuation performance of PUMPS actuator, which is one of the pre-stressed piezoelectric actuators developed by present authors, cannot be predicted accurately without consideration of piezoelectric nonlinearities such as voltage and stress effects. Generally, the piezoelectric behavior is mainly affected by the piezoelectric strain coefficient and the elastic modulus. Therefore, the voltage and stress effects on the piezoelectric strain coefficient and the elastic modulus of piezoelectric layer were investigated, and the results were used for prediction of actuation performance of PUMPS. Taking the nonlinear material properties of the piezoelectric layer into account, the actuation performance of PUMPS was accurately predicted in this study.

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Reports on the topic "Piezoelectric actuation"

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Bailey, Thomas, Alexander Gruzen, and Paul Madden. RCS/Piezoelectric Distributed Actuator Study. Defense Technical Information Center, 1988. http://dx.doi.org/10.21236/ada201276.

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Booth, Janice C., Tracy Hudson, Brian A. English, Michael R. Whitley, and Michael S. Kranz. Integrated Printed Circuit Board (PCB) Active Cooling With Piezoelectric Actuator. Defense Technical Information Center, 2012. http://dx.doi.org/10.21236/ada567661.

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Hall, Asha, and Mark Bundy. Overview of Piezoelectric Actuator Displacement Measurements Utilizing a MTI-2100 Fotonic Sensor. Defense Technical Information Center, 2011. http://dx.doi.org/10.21236/ada540429.

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Lynch, Christopher S., and Chad Landis. Development of a Non-Linear Element Code for the Improvement of Piezoelectric Actuator Design and Reliability. Defense Technical Information Center, 2006. http://dx.doi.org/10.21236/ada459521.

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