Journal articles: 'Piezoelectric actuation'

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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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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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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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Oh, Il Kwon, and Dong Hyun Kim. "Frequency Tuning Characteristics of Multi-Layered Micro-Resonators Using Thermal and Piezoelectric Actuation." Key Engineering Materials 324-325 (November 2006): 647–50. http://dx.doi.org/10.4028/www.scientific.net/kem.324-325.647.

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Frequency tuning characteristics of the multi-layered micro-resonators have been extensively investigated by using thermal and piezoelectric actuations. Based on the layerwise displacement theory and geometric nonlinear formulation, the nonlinear deformation and its attendant vibration characteristics of un-symmetrically deposited camped-camped micro-beams under piezoelectric and thermal actuations have been analyzed. The effects of the eccentric piezoelectric actuation and uniform thermal loading on the large deflection and natural modes were discussed with respect to geometric nonlinear responses and initial imperfection. Present results show that both piezoelectric and thermal actuations can effectively tune the resonant frequencies as increasing and decreasing desired values by the alternative selection of the dominance between in-plane deformation and out-of-plane deformation.

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Panda, Satyajit. "Performance of a short piezoelectric fiber–reinforced composite actuator in vibration control of functionally graded circular cylindrical shell." Journal of Intelligent Material Systems and Structures 27, no. 20 (2016): 2774–94. http://dx.doi.org/10.1177/1045389x16641219.

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For improved flexibility and conformability of piezoelectric fiber–reinforced composite actuator, it is reconstructed in a recent study by the use of short piezoelectric fibers (short piezoelectric fiber–reinforced composite) instead of continuous fibers (continuous piezoelectric fiber–reinforced composite). This modification facilitates its application in short piezoelectric fiber–reinforced composite layer form instead of continuous piezoelectric fiber–reinforced composite patch form particularly in case of host structures with highly curved boundary surfaces. But the corresponding change in actuation capability is a major issue for potential application of short piezoelectric fiber–reinforced composite that is studied in this work through the control of vibration of a functionally graded circular cylindrical shell under thermal environment. First, an arrangement of continuous piezoelectric fiber–reinforced composite actuator patches over the host shell surface is presented with an objective of controlling all modes of vibration. Next, the use of short piezoelectric fiber–reinforced composite actuator layer for similar control activity is demonstrated through an arrangement of electrode patches over its surfaces. Subsequently, an electric potential function is assumed for the consideration of electrode patches and a geometrically nonlinear coupled thermo-electro-mechanical incremental finite element model of the harmonically excited overall functionally graded shell is developed. The numerical results reveal actuation capability of short piezoelectric fiber–reinforced composite actuator layer with reference to that of the existing continuous piezoelectric fiber–reinforced composite/monolithic piezoelectric actuator patches. The effects of temperature, size of electrode patches, properties of piezoelectric fiber–reinforced composite, and functionally graded properties on the control activity of short piezoelectric fiber–reinforced composite/continuous piezoelectric fiber–reinforced composite actuator are also presented.

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Chinaud, Maxime, Johannes Scheller, Jean François Rouchon, Eric Duhayon, and Marianna Braza. "Hybrid Electroactive Wings Morphing for Aeronautic Applications." Solid State Phenomena 198 (March 2013): 200–205. http://dx.doi.org/10.4028/www.scientific.net/ssp.198.200.

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As part of the RTRA funded EMMAV (Electroactive Morphing for Micro-Airvehicles) research program electroactive materials were studied as well as their applications as actuators for morphing wings. The aim of this research program is to study both the actuation with large displacements at low frequencies as well as low displacement, high frequency actuation. The large displacement actuation, which targets primarily the flight control, is achievable using Shape Memory Alloys (SMA) while high frequency; low displacement actuation can be achieved using piezoelectric actuators [. This high frequency actuation is especially interesting for improving the aeroelastic coupling effect inducing both noise and drag. This paper describes the construction of a prototype incorporating piezoelectric and SMA based actuation mechanisms. Furthermore, a cooling mechanism for SMAs is described aiming at improving the cycle time of the actuator. The developed prototype is to be evaluated during wind-tunnel experiments showing the influence of the actuation on the fluid.

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Wetherhold, Robert, Markus Messer, and Abani Patra. "Optimization of Directionally Attached Piezoelectric Actuators." Journal of Engineering Materials and Technology 125, no. 2 (2003): 148–52. http://dx.doi.org/10.1115/1.1555653.

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A directionally attached piezoelectric (DAP) actuator is one method to control the twisting vibration of a plate with high authority. Although insuring proper performance for DAP actuators has been discussed in terms of the control law used, the optimization of the mechanical details of the actuator itself has received little attention. There is an interaction between the actuator and the controlled structure because more actuator material on the structure adds actuation power but also stiffens the structure. The effects of DAP actuator geometric parameters and material properties are explored in a systematic way for the case of a cantilever beam and it is shown that significant improvements in performance are possible. The material property study indicates that an optimum point exists whereby the weight and thus cost can be lowered while improving structure response by using a composite actuator. The actuator thickness, width, orientation angle, and offset from the clamped end have significant effects on structure response. In order of importance, the geometric parameters are: actuator thickness, orientation angle, width and offset. A study of the modal distribution for the structure shows that if the input disturbance that is to be suppressed is modally well characterized, the structure can be efficiently controlled by using more than one independent actuation voltage.

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Ervin, James D., and Diann E. Brei. "Dynamic Behavior of Piezoelectric Recurve Actuation Architectures." Journal of Vibration and Acoustics 126, no. 1 (2004): 37–46. http://dx.doi.org/10.1115/1.1596551.

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A new family of piezoelectric actuators, called Recurves, exhibits high work per volume and have the extra benefit of performance and packaging tailorability. The focus of this paper is the dynamic performance of this novel actuation scheme. Two dynamic models, a detailed transfer matrix model and a simpler rod approximation model, are presented to predict the steady state frequency response of a general Recurve actuator driving a mass and spring load. Results from a 23 design of experiments are given that validate these models and demonstrate the impact of the architectural design parameters on the dynamic behavior of a generic Recurve actuator.

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Alfaro Barrantes, Juan, Paola Vega Castillo, Marta Vílchez Monge, and Marco Rodríguez Montero. "Simulation of laminar bimorph piezoelectric microactuators with application in miniaturized robots." Revista Tecnología en Marcha 25, no. 5 (2012): 116. http://dx.doi.org/10.18845/tm.v25i5.484.

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In order to implement miniaturized robots different possibilities for electromechanical actuation at the microscale must be evaluated according to their function on the robot, as well as, size, mechanical strength and deformation, resolution, power supply, energy and degrees of freedom required. The piezoelectric actuators are among the most suitable possibilities to incorporate microactuators in miniaturized robots.This article presents an overview of piezoelectric actuation and the evaluation of a simple x-y micropositioning actuator for a miniaturized robot using COMSOL Multiphysics.

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Hu, Kai-ming, Hua Li, and Li-Hua Wen. "Experimental study of axial-compressed macro-fiber composite bimorph with multi-layer parallel actuators for large deformation actuation." Journal of Intelligent Material Systems and Structures 31, no. 8 (2020): 1101–10. http://dx.doi.org/10.1177/1045389x20910262.

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Piezoelectric bimorphs have a promising application in morphing micro air vehicles; however, increasing the actuation displacement is a difficult point. Axial compression can be used to increase the deformation of the piezoelectric bimorph. Compared with piezoelectric ceramics, macro fiber composites offer higher flexibility. In this article, a large displacement actuator of axial-compressed macro fiber composite bimorph is proposed. A multi-layer parallel scheme of macro fiber composite bimorphs is presented to increase the output torque of piezoelectric bimorph within a limited space. The actuation performance of the axial-compressed macro fiber composite bimorph and its multi-layer parallel scheme are verified through quasi-static experiment and displacement tracking control test. The experimental results show that the end-free rotations of both the axial-compressed macro fiber composite bimorph and its multi-layer scheme achieve ±8.1°, which is 60% higher than that of a piezoelectric ceramics bimorph with the same length. The blocking torque of the single-layer macro fiber composite bimorph is 0.028 Nm. The proposed parallel bimorphs method can magnify output torques. In addition, the axial-compressed macro fiber composite bimorph can accurately track any displacement signals in the range of its actuation. It is a continuous and controllable piezoelectric bimorph with large displacement.

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Lee, Jae Hoon, Bum Soo Yoon, Ji-Won Park, Gunho Song, and Kwang Joon Yoon. "Flexural Deflection Prediction of Piezo-Composite Unimorph Actuator Using Material Orthotropy and Nonlinearity of Piezoelectric Material Layer." Coatings 10, no. 5 (2020): 437. http://dx.doi.org/10.3390/coatings10050437.

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Layered piezo-composite unimorph actuators have been studied by many research teams to provide active vibration control of thin-walled aerospace structures, control the shapes of aircraft wing airfoils, and control the fins of small missiles, because they require less space and provide better frequency responses than conventional electro-magnetic motor actuator systems. However, due to the limited actuation strains of conventional piezo-composite unimorph actuators with poly-crystalline piezoelectric ceramic layers, they have not been implemented effectively as actuators for small aerospace vehicles. In this study, a lightweight piezo-composite unimorph actuator (LIPCA-S2) was manufactured and analyzed to predict its flexural actuation displacement. It was found that the actuated tip displacement of a piezo-composite cantilever could be predicted accurately using the proposed prediction model based on the nonlinear properties of the piezoelectric strain coefficient and elastic modulus of a piezoelectric single crystal.

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Dubey, Manish Kumar, and Satyajit Panda. "Shear actuation mechanism and shear-based actuation capability of an obliquely reinforced piezoelectric fibre composite in active control of annular plates." Journal of Intelligent Material Systems and Structures 30, no. 16 (2019): 2447–63. http://dx.doi.org/10.1177/1045389x19862638.

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In this work, the mechanism of shear actuation and the shear mode actuation capability of an obliquely reinforced piezoelectric fibre composite are investigated in active control of annular plates. This piezoelectric fibre composite is capable of providing extensional and shear actuation forces in a transverse plane of its Cartesian material coordinate system, and these actuation forces are utilized for shear-based actuation of an annular plate by embedding the piezoelectric fibre composite patches at the core of the plate. First, the mechanism of shear actuation of the annular sandwich plate is analysed, and it mainly reveals an adverse effect of the coupling between the transverse normal strain and shear stresses on the shear actuation forces, even though a good shear-actuated bending deformation of the annular plate is observed. So, next, the effectiveness of the piezoelectric fibre composite patches in shear mode active control of flexural vibration of the annular sandwich plate is investigated, where a shear-based feedback control arrangement is proposed for effective active control of the plate according to the velocity feedback control law. The analysis reveals an indicative shear actuation capability of this obliquely reinforced piezoelectric fibre composite, and thus it may be a potential material for shear-based active control of vibration of annular plates.

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YEO, C. Y., W. K. SHIM, E. WOUTERSON, TAO LI, and J. MA. "PIEZOELECTRIC MATERIALS FOR IMPEDANCE DRIVEN MICRO-CHANNEL FLOW." Functional Materials Letters 01, no. 03 (2008): 225–28. http://dx.doi.org/10.1142/s1793604708000356.

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This paper presents study of a novel impedance pumping induced by high frequency actuation. PZT (Lead Zirconate Titanate) cantilever beam was being integrated as a form of high frequency actuator to induce flow. The drive test microchannel has the dimension 15 × 3 × 0.4 mm3, and a significant flow rate of 36 μL/s has being measured. Furthermore, flow behavior as functions of actuation amplitude and frequency are presented. It is found that flows were in positive correlations with compression and frequency. The present novel PZT driven micro impedance pump may offer an alternate solution in microfludic systems.

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Cui, Y. G., Wei Jie Dong, C. Y. Gao, Q. Y. Zeng, and Bao Yuan Sun. "Study on Displacement Self-Sensing of Piezoelectric Actuator." Key Engineering Materials 339 (May 2007): 240–45. http://dx.doi.org/10.4028/www.scientific.net/kem.339.240.

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This paper aims to make piezoelectric ceramic actuator self-sense its own displacement in the absence of independent sensor. It is derived from the basic piezoelectric equation that the free charge on the wafer of piezoelectric ceramic actuator contains displacement information. So a displacement self-sensing method based on integrate circuit is presented. Voltage driving circuit for the piezoelectric ceramic actuator and integrated circuit for gathering free charge are designed. Based on the proposed compound circuits, the actuator can sense its own displacement while actuation. It is convenient to adjust the circuit and easy to acquire sensitive signal by using this method, and the impedance mismatching problem met in bridge method is overcome. The experimental results show that piezoelectric self-sensing actuator can effectively measure its displacement signal under the conditions of different wave form of driving voltage and different driving voltage frequency.

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Ghosh, Bhaskar, Ravi K. Jain, S. Majumder, SS Roy, and Sumit Mukhopadhyay. "Experimental characterizations of bimorph piezoelectric actuator for robotic assembly." Journal of Intelligent Material Systems and Structures 28, no. 15 (2017): 2095–109. http://dx.doi.org/10.1177/1045389x16685441.

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Piezoelectric actuator is one of the most versatile types of smart actuators, extensively used in different industrial applications like robotics, microelectromechanical systems, micro-assembly, biological cell handling, self-assembly, and optical component handling in photonics. By applying potential to a piezoelectric actuator, it can produce micro level deflection with large force generation, very fast response, and long-term actuation as compared to other actuators. The design and analysis of the bimorph piezoelectric cantilever using proportional–integral controller are carried out where the bimorph piezoelectric actuator is used as an active actuator for providing the dexterous behavior during robotic assembly. Characterization of bimorph piezoelectric actuator carried out by controlling voltage signal provides steady-state behavior which is verified by conducting experiments. A prototype of micro gripper is also developed which shows the potential of handling small lightweight objects for robotic assembly.

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Lee, Sung Hyuk, Seok Heo, Cheol Woong Kim, and Kwang Joon Yoon. "The Characteristic Analysis of a Piezoelectric Actuator for Valveless Micropumps." Key Engineering Materials 326-328 (December 2006): 1511–14. http://dx.doi.org/10.4028/www.scientific.net/kem.326-328.1511.

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The behavior of a circular piezoelectric actuator for volumetric micropump has been investigated by using theoretical and finite element analyses. A modified theoretical model was developed to predict the behavior of a piezoelectric actuator induced by the applied voltage. The theoretical results for the diaphragm deflection were in good agreement with the results from numerical simulation. Based on the theoretical analysis, the effects of several important parameters on actuation performance have been investigated. These parameters include the dimensions and mechanical properties of the piezoelectric disk, bonding layer and elastic diaphragm materials. Consequently, it is thought that above theoretical model might be employed as a tool for design and optimization of the piezoelectric actuator for micropump application.

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Wang, Bin, Nanyue Xu, Pengyuan Wu, and Rongfei Yang. "Simulation on an electro-hydrostatic actuator controlled by a high-pressure piezoelectric pump with a displacement amplifier." Assembly Automation 41, no. 4 (2021): 413–18. http://dx.doi.org/10.1108/aa-04-2020-0054.

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Purpose The purpose of this paper is to provide a new hydrostatic actuator controlled by a piezoelectric piston pump and to reveal its characteristics. Design/methodology/approach In this paper, a piezoelectric pump with passive poppet valves and hydraulic displacement amplifier is designed as a new control component in a hydrostatic actuator for high actuation capacity. A component-level mathematical model is established to describe the system characteristics. Simulation verification for cases under typical conditions is implemented to evaluate the delivery behavior of the pump and the carrying ability of the actuator. Findings By using the displacement amplifier and the passive distributing valves, simulation demonstrates that the pump can deliver flow rate up to 3 L/min, and the actuator controlled by this pump can push an object weighing approximately 50 kg. In addition, it is particularly important to decide a proper amplification ratio of the amplifier in the pump for better actuation performance. Originality/value The piezoelectric pump presented in this paper has its potential to light hydrostatic actuator. The model constructed in this paper is valid for characteristic analysis and performance evaluation of this pump and actuators.

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Noveanu, Simona, Dan Mândru, Alexandru Ivan, and Vencel Iosif Csibi. "Research Concerning the Ramp and Sinusoidal Command Signals of the Piezoelectric Miniactuators." Solid State Phenomena 166-167 (September 2010): 321–26. http://dx.doi.org/10.4028/www.scientific.net/ssp.166-167.321.

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In this paper is presented a mini-system with compliant minigripper and piezoelectric actuation. The piezoelectric actuator is controlled with ramp and sinus signals. The response of the mini-system is predicted by the finite elements method. The displacement of the compliant mini-gripper and piezoactuator are analyzed. In the end is presented a comparison of the experimental results for same actuator but for two different types of the signals with theoretical results.

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Simmers, Garnett E., Jeffrey R. Hodgkins, David D. Mascarenas, Gyuhae Park, and Hoon Sohn. "Improved Piezoelectric Self-sensing Actuation." Journal of Intelligent Material Systems and Structures 15, no. 12 (2004): 941–53. http://dx.doi.org/10.1177/1045389x04046308.

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Kang, In Pil, Hyo Byung Chae, Ki Hoon Park, Kwang Joon Yoon, Li Li Xin, and Tae Sam Kang. "A Development of Miniaturized Piezoelectric Actuator System for Mobile Smart Structures." Key Engineering Materials 326-328 (December 2006): 1395–98. http://dx.doi.org/10.4028/www.scientific.net/kem.326-328.1395.

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A smart material actuator is required for a smart structure having multifunctional performance. Among the smart material actuators, piezoelectric actuator is known for its excellent large force generation in broad bandwidth in a compact size. However it needs relatively large actuation voltage requiring a bulky hardware system. This study is mainly concerned to develop a self-powered miniaturized piezoelectric actuator driver (MIPAD) controlled by a radio controller for small sized piezoelectric smart structures. It can receive command from other microprocessors or a remote radio controller. We designed a real hardware and it demonstrated good performances even though the driving system was very small. The MIPAD is expected to minimize the weight and size of the piezoelectric actuator system and it can be easily embedded into mobile smart structures.

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Oh, Il Kwon, Won Gul Whang, Dong Hyun Kim, and In Lee. "Stabilization of Thermoelastic Unstable Postbuckling in Cylindrical Piezolaminated Panels." Key Engineering Materials 334-335 (March 2007): 1009–12. http://dx.doi.org/10.4028/www.scientific.net/kem.334-335.1009.

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In this study, the stabilization of thermoelastic unstable postbuckling in cylindrical piezolaminated panels was investigated by applying piezoelectric actuation. In order to derive the finite element equations of motion of the active piezolaminated cylindrical panels, the total Lagrangian formulation was derived using the Hamilton’s virtual work principles for largely deformed structures with small strain. For the purpose of finding the load-displacement tracking, a cylindrical arc-length method was applied to the iterative Newton-Raphson scheme. Present results show that the eccentric piezoelectric patch can passively remove the unstable postbuckling and the snap-through without piezoelectric actuation. Also, the thermoelastic snap-through can be successfully suppressed by using a piezoelectric actuation.

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Vílchez Monge, Marta, Estuardo Herrera Muñoz, Natalia Rodríguez Rodríguez, and Paola Vega Castillo. "Simulation of translational piezoelectric microactuators with application in miniaturized robots." Revista Tecnología en Marcha 25, no. 5 (2012): 124. http://dx.doi.org/10.18845/tm.v25i5.485.

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In the design of miniaturized robots, different types of microelectromechanical actuators must be evaluated to determine the most appropriate one for each specific function as well as the best actuation effect for the size, force, supply voltage, energy, precision and degrees of freedom required.The piezoelectric effect is one of the most promising effects to incorporate microactuators in miniaturized robots. This paper presents a brief comparison on actuation methods for translational displacement and discusses its feasibility for application in miniaturized robots. The specific case of evaluation of a translational piezoelectric actuator using COMSOL Multiphysics is described, as well as an application example for a microgripper to be incorporated in a miniaturized robot for grasping submicrometric objects.

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Maurini, C., Joel Pouget, and Stefano Vidoli. "Bistable Buckled Beam: Modelling and Piezoelectric Actuation." Advances in Science and Technology 54 (September 2008): 281–86. http://dx.doi.org/10.4028/www.scientific.net/ast.54.281.

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Bistable structures, such as buckled beams, are characterized by a two-well potential. Their nonlinear properties are currently exploited in actuators to produce relatively high displacements and forces with low actuation energies. We investigate the use of distributed multiparameter actuation to control the buckling and postbuckling behaviour of a three-layer piezoelectric beam pinned at either end. A two-parameter bending actuation controls the transversal motion, whilst an axial actuation modulates the tangent bending stiffness. The postbuckling behaviour is studied by reducing to a 2 dof system a nonlinear extensible elastica model. When the bending actuation is spatially symmetric, the postbuckling phenomena are characterized by a snapthrough instability. The use of a two-parameter actuation opens new transition scenarios, where it is possible to get quasi-static transitions between the two equilibria of the buckled beam, without any instability phenomenon.

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Lim, Young Seok, Seung Jae Min, and Shinji Nishiwaki. "Structural Design of Piezoelectric Actuator Considering Polarization Direction and Continuous Approximation of Material Distribution." Key Engineering Materials 326-328 (December 2006): 1407–10. http://dx.doi.org/10.4028/www.scientific.net/kem.326-328.1407.

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In the design of piezoelectric actuator the concept of compliant mechanism combined with piezoelectric materials has been used to magnify either geometric or mechanical advantage. The polarization of piezoelectric materials is considered to improve actuation since the piezoelectric polarization has influences on the performance of the actuator. The topology design of compliant mechanism can be formulated as an optimization problem of material distribution in a fixed design domain and continuous approximation of material distribution(CAMD) method has demonstrated its effectiveness to prevent the numerical instabilities in topology optimization. The optimization problem is formulated to maximize the mean transduction ratio subject to the total volume constraints and solved using a sequential linear programming algorithm. The performance improvement of Moonie actuator design confirms an effect of polarization direction and CAMD.

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32

Kim, Cheol, and Dong Yeub Lee. "Design Optimization of a Curved Actuator with Piezoelectric Fibers." International Journal of Modern Physics B 17, no. 08n09 (2003): 1971–75. http://dx.doi.org/10.1142/s0217979203019964.

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Piezoelectric Fiber Composite with Interdigitated Electrodes (PFCIDE) was previously introduced as an alternative to monolithic wafers with conventional electrodes for applications of structural actuation. This paper is an investigation into the performance improvement of piezoelectric fiber composite actuators by optimizing the stacking sequence and changing the matrix material. This paper presents the numerical optimization of a piezoelectric fiber/piezoelectric matrix composite actuator with IDE (PFPMIDE). Various concepts from different backgrounds, including three-dimensional linear elastic and dielectric theories, have been incorporated into the present linear piezoelectric model. To see the structural responses of the actuator integrated with the PFPMIDE, three dimensional finite element formulations were derived. Numerical analyses show larger center displacement of the curved actuator with the PFPMIDE due to optimization of the piezoelectric fiber angles. This paper presents the concept of a curved actuator that occurs naturally via thermal residual stress during the curing process, as well as the optimization of the maximum curved actuator displacement, which is accomplished using the Davidon-Fletcher-Powell (DFP) method.

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33

Wang, R. T. "Structural Responses of Surfac-Mounted Piezoelectric Curved Beams." Journal of Mechanics 26, no. 4 (2010): 439–51. http://dx.doi.org/10.1017/s1727719100004640.

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ABSTRACTThe formulation of one Timoshenko curved beam on which a pair of piezoelectric segments bonded is presented. The analytical-transfer matrix method is adopted to study structural responses of the surface-mounted actuation curved beam induced by an external force at the tip of the beam and by an applied voltage on the actuator. The effects of length, location and thickness of the piezoelectric pair on the structural responses of the entire curved beam are investigated.

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Liu, Guojun, Yanyan Zhang, Jianfang Liu, et al. "An Unconventional Inchworm Actuator Based on PZT/ERFs Control Technology." Applied Bionics and Biomechanics 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/2804543.

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An unconventional inchworm actuator for precision positioning based on piezoelectric (PZT) actuation and electrorheological fluids (ERFs) control technology is presented. The actuator consists of actuation unit (PZT stack pump), fluid control unit (ERFs valve), and execution unit (hydraulic actuator). In view of smaller deformation of PZT stack, a new structure is designed for actuation unit, which integrates the advantages of two modes (namely, diaphragm type and piston type) of the volume changing of pump chamber. In order to improve the static shear yield strength of ERFs, a composite ERFs valve is designed, which adopts the series-parallel plate compound structure. The prototype of the inchworm actuator has been designed and manufactured in the lab. Systematic test results indicate that the displacement resolution of the unconventional inchworm actuator reaches 0.038 μm, and the maximum driving force and velocity are 42 N, 14.8 mm/s, respectively. The optimal working frequency for the maximum driving velocity is 120 Hz. The complete research and development processes further confirm the feasibility of developing a new type of inchworm actuator with high performance based on PZT actuation and ERFs control technology, which provides a reference for the future development of a new type of actuator.

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35

Koo, Ja Choon, Hyouk Ryeol Choi, Min Young Jung, Kwang Mok Jung, Jae Do Nam, and Young Kwan Lee. "Design and Control of Three-DOF Dielectric Polymer Actuator." Key Engineering Materials 297-300 (November 2005): 665–70. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.665.

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Smart polymer based actuators have demonstrated various benefits over the traditional electromagnetic or piezoelectric-material actuators. One of the most significant contributions of the polymers is its soft actuation mechanisms. Hence morphological freedom for actuator construction benefits production of either small scale complex mechanisms or human-like applications. Although many actuation paradigms of polymer actuators are presented in various publications, no significant contributions are made for investigation of modeling and control methods of the material. In the present work, a smart polymer based actuator is constructed. It is then modeled and analyzed for feasible control scheme selection.

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36

Yoon, Kwang Joon, Kyu Young Kim, Nam Seo Goo, Hyun Chul Park, and J. R. Haw. "Actuator Performance Degradation of Piezo-Composite Actuator LIPCA under Cyclic Actuation." Key Engineering Materials 261-263 (April 2004): 1331–36. http://dx.doi.org/10.4028/www.scientific.net/kem.261-263.1331.

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This paper is concerned with the fatigue characteristics of LIPCA (LIghtweight Piezo-Composite Actuator) device system. LIPCA device system is composed of a piezoelectric ceramic layer and fiber reinforced light composite layers, typically a PZT ceramic layer is sandwiched by a top fiber layer with low CTE (coefficient of thermal expansion) and base layers with high CTE. The advantages of the LIPCA design are using the lightweight fiber reinforced plastic layers without compromising the generation of high force and large displacement and to have design flexibility by selecting the fiber direction and the size of prepreg layers. In addition to the lightweight advantage and design flexibility, the proposed device can be manufactured without adhesive layers when we use resin prepreg system. To investigate the degradation of actuation performance of LIPCA due to the repeated fatigue loading, the repeated loading tests up to several million cycle were performed and the actuation displacement for a given excitation voltage was measured during the test. The fatigue characteristics was measured using an actuator test system consisted of an actuator supporting jig, a high voltage actuating power supplier, and a non-contact laser measuring system and evaluated.

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37

Habibi, Saeid, Richard Burton, and Eric Sampson. "High Precision Hydrostatic Actuation Systems for Micro- and Nanomanipulation of Heavy Loads." Journal of Dynamic Systems, Measurement, and Control 128, no. 4 (2005): 778–87. http://dx.doi.org/10.1115/1.2229259.

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In this paper reports on an important finding, that is, hydrostatic actuation systems are able to manipulate heavy loads with submicron precision and a large stroke. In this relation, the design of a high-precision hydrostatic actuation system referred to as the ElectroHydraulic Actuator (EHA) is presented. A laboratory prototype of this system has achieved an unprecedented level of performance by being able to move a large load of 20Kg with a precision of 100nm and a stroke of 12cm. This level of performance places the hydrostatic actuation concept in competition with piezoelectric platforms in terms of positional accuracy. Experimental results from this prototype are reported and analyzed.

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38

Rusovici, Razvan, Casey Offord, and Charles Phelps. "A Coupled Field Finite Element Modeling Procedure for Design of a Synthetic-Jet Actuators." Journal of Intelligent Material Systems and Structures 22, no. 2 (2011): 161–73. http://dx.doi.org/10.1177/1045389x10395644.

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The development and validation of a modeling procedure used for design of piezoceramic-driven, SJAs, which is based on ANSYSTM FE software, is described. This approach holds the advantage over others in that it fully couples the complex physical interactions among the structure of the actuator, the working fluid, and the driving piezoelectric actuation. The procedure employed was two FEMs: one used a fully coupled acoustic-structural-piezoelectric, while the other used a fully coupled fluid-structure-piezoelectric field formulation. The acoustic-structural-piezoelectric model was useful in that it was used to predict quickly the acoustic and structural resonant frequencies of the actuator device for rapid design. While the fluid-structural-piezoelectric model was more computationally expensive than the acoustic-structural-piezoelectric model, it was superior in that it provided insight into transient synthetic-jet output velocity time and spatial dependence, displacement, and structural stress time histories. This procedure allows investigation of actuator design and of fluid dynamics of synthetic-jets. The models’ predictions were compared to experimental data obtained for a sample actuator configuration and good agreement was found. Both FEMs were defined for an axisymmetric, single-diaphragm piezoelectric actuator, but the procedure may be extended to other actuator geometries.

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39

Nandi, A., S. Neogy, S. Bhaduri, and H. Irretier. "Vibration Attenuation by a Combination of a Piezoelectric Stack and a Permanent Magnet." Shock and Vibration 19, no. 4 (2012): 719–34. http://dx.doi.org/10.1155/2012/358953.

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The present work proposes a non-contact vibration attenuator made up of a permanent magnet mounted on a piezoelectric stack. Two such actuators are made to work simultaneously in a 'twin-actuator' configuration. It is conceived that a controlled change in the gap between the actuator and the structure is capable of attenuation of vibration of the structure. This appropriate change in gap is achieved by controlled motion of the piezoelectric stacks. It is shown that the actuator works as an active damper when the extension and contraction of the actuators are made proportional to the velocity of the beam. The resolution of extension of a piezoelectric stack is in the order of nanometers. Thus in the proposed actuator the force of actuation can be applied with great precision. This actuator is also attractive for its simple constructional feature.

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Zaehringer, Sandy, Julia Purr, and Norbert Schwesinger. "Manipulation of IDT-Actuated Piezoelectric Membrane Actuators by Silicon Clamping." Applied Mechanics and Materials 518 (February 2014): 215–19. http://dx.doi.org/10.4028/www.scientific.net/amm.518.215.

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This paper will introduce a piezoelectric micro membrane actuator with interdigitated (IDT) surface electrodes for polarization and actuation. The thus achieved polarization and generated electric field are highly inhomogeneous and cause therefore also inhomogeneous strain and stress distributions within the piezoelectric material itself. To equalize the strain and stress the material will deform. This deformation can be manipulated due to electrodes design and clamping of the membrane. The most outstanding achievement with this manipulation is the deflection of the membrane towards the actuated surface and not as is common in piezoelectric membrane actuators towards the passive surface of the device.

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41

Sokhanvar, S., A. Zabihollah, and R. Sedaghati. "INVESTIGATING THE EFFECT OF THE ORTHOTROPIC PROPERTY OF PIEZOELECTRIC PVDF." Transactions of the Canadian Society for Mechanical Engineering 31, no. 1 (2007): 111–25. http://dx.doi.org/10.1139/tcsme-2007-0007.

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The applications of the piezoelectric Polyvinylidene Fluoride, PVDF, integrated with the beams, plates, and membranes, performing as sensor, actuator or combination have been received considerable attention in the recent years. However, not much work has been reported on the influence of the PVDF’s orthotropic behavior, particularly the effect of the orientation of the PVDF film in the host structure, on the performance of the system. In the present study, the effect of the piezoelectric PVDF film orientation on the output voltage, the actuation force, and the dynamic response of the integrated structures has been studied using the finite element method. In the sensory mode, the difference between the output voltages obtained from the biaxial piezoelectric PVDF film and uniaxial one, when the orientation of the film varies from 0 to 90 degree, is investigated. In each case the proportion contributions of the involved piezoelectric coefficients including d31, d32 and are studied. Alternatively, in the actuation mode, the effect of orthotropic behavior of the actuator on the nodal displacements has been taken into consideration. The influence of the material orthotropic property of the transducer on the free undamped response of the system is also investigated. Moreover an effective Young’s modulus and effective Poisson ratio for the uniaxial PVDF film has been introduced using an optimization procedure to minimize the error caused by isotropic assumption of uniaxial PVDF film.

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42

Tang, Yu Juan, and Jiong Wang. "An Action Reversible Mechanism with Piezoelectric Actuator." Applied Mechanics and Materials 105-107 (September 2011): 1727–30. http://dx.doi.org/10.4028/www.scientific.net/amm.105-107.1727.

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At present, the explosion isolator of the fuze safety system using stepping motor or based on the slider continuation move realized safe state restorability, but the former is restricted by the volume of stepping motor, however, the stepping motor is vulnerable to electromagnetic interference; the latter structure is complex, with several independent components, not compact and irreversible. In view of this, an action reversible mechanism based on piezoelectric actuator is proposed, realizing the fuze safety system reversibility. The principle of the piezoelectric actuator is described and the drive mechanism is designed. The feasibility is analysed. The study shows that the mechanism has the certain practical value for compact structure, small volume and reliable actuation.

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43

Yang, An Shik, Jeng Jong Ro, and Wei Han Chang. "Performance Characterization of a Piezoelectric Micro SJA." Advanced Materials Research 74 (June 2009): 223–26. http://dx.doi.org/10.4028/www.scientific.net/amr.74.223.

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This paper aims to explore the synthetic jet behavior for a dual-diaphragm piezoelectrically driven micro synthetic jet actuator. For a sinusoidal actuation cycle at an operating frequency of 648 Hz, the synthetic jet flow pattern was simulated and compared with the visualized image and measured centerline velocity distribution to validate the computer code. The far-field flow structure was similar to a common continuous turbulent air jet; whereas, the unsteady formation of a vortex pair was predicted in the near-field. Numerical experiments were extended to appraise performance of micro synthetic jet actuators by varying the driving voltage, width of the slot and depth of the actuator cavity.

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Ghazali, Nazwan, Mohamed Shaik Dawood, and S. M. Kashif. "Effects of Piezoelectric Actuation on Delamination in Transversely Loaded Composite Plates." Advanced Materials Research 1115 (July 2015): 560–63. http://dx.doi.org/10.4028/www.scientific.net/amr.1115.560.

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Fiber reinforced composite materials are known to have poor tolerance to impact loads. Damages can be observed in the forms of matrix crack, fiber failure and delamination. In the case of low velocity impact, delamination is often a major concern due to its hidden nature. In this work, the effects of piezoelectric actuation on delamination in composite plates subjected to low velocity impact have been studied using LS-DYNA. It was found that, piezoelectric actuators can be used to reduce delamination in composite laminates. This was achieved by actuating the laminate to curve in the opposite direction of the incoming impact load.

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Olivares, J., E. Iborra, M. Clement, L. Vergara, J. Sangrador, and A. Sanz-Hervás. "Piezoelectric actuation of microbridges using AlN." Sensors and Actuators A: Physical 123-124 (September 2005): 590–95. http://dx.doi.org/10.1016/j.sna.2005.03.066.

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46

Bent, Aaron A., Nesbitt W. Hagood, and John P. Rodgers. "Anisotropic Actuation with Piezoelectric Fiber Composites." Journal of Intelligent Material Systems and Structures 6, no. 3 (1995): 338–49. http://dx.doi.org/10.1177/1045389x9500600305.

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Niezrecki, C., D. Brei, S. Balakrishnan, and A. Moskalik. "Piezoelectric Actuation: State of the Art." Shock and Vibration Digest 33, no. 4 (2001): 269–80. http://dx.doi.org/10.1177/058310240103300401.

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Tonisch, K., C. Buchheim, F. Niebelschütz, et al. "Piezoelectric actuation of all-nitride MEMS." physica status solidi (c) 5, no. 6 (2008): 1910–13. http://dx.doi.org/10.1002/pssc.200778423.

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49

Tzou, H. S., W. K. Chai, and S. M. Arnold. "Structronics and Actuation of Hybrid Electrostrictive/Piezoelectric Thin Shells." Journal of Vibration and Acoustics 128, no. 1 (2005): 79–87. http://dx.doi.org/10.1115/1.2149397.

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Certain ferroelectric materials possess dual electrostrictive and piezoelectric characteristics, depending on their specific Curie temperatures. The nonlinear electro-mechanical effect of electrostrictive materials provides stronger actuation performance as compared with that of piezoelectric materials. Due to the complexity of the generic ferroelectric actuators, micro-electromechanics, structure-electronic (structronic) coupling and control characteristics of hybrid electrostrictive/piezoelectric dynamic systems deserve an in-depth investigation. In this study, dynamic electro-mechanical system equations and boundary conditions of hybrid electrostrictive/piezoelectric double-curvature shell continua are derived using the energy-based Hamilton’s principle, elasticity theory, electrostrictive/piezoelectric constitutive relations, and Gibb’s free energy function. These governing equations clearly reveal the coupling of electrostrictive, piezoelectric, and elastic fields and characteristics change triggered by the Curie temperature. The electric terms are used to manipulate and to control the static/dynamic behavior of hybrid electrostrictive/piezoelectric shells. To apply the hybrid shell system equations to other geometries, simplification procedures using two Lamé parameters and two radii of curvature are demonstrated in two cases: A hybrid electrostrictive/piezoelectric conical shell and a hybrid electrostrictive/piezoelectric toroidal shell. Following the same procedures, one can apply the generic system equations to other common geometries, e.g., beams, arches, plates, rings, cylindrical shells, spherical shells, etc., or specific materials, e.g., electrostrictive or piezoelectric, and further evaluate their electromechanical characteristics and actuation/control effectiveness.

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Zheng, Wei, Xue Feng Yao, Jing Shi Dong, and Bo Da Wu. "Preliminary Study on Piezoelectric Actuation Solution Proportioner." Applied Mechanics and Materials 532 (February 2014): 13–17. http://dx.doi.org/10.4028/www.scientific.net/amm.532.13.

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The conventional solution proportioner, which is costly and bulky with complex mechanical structure, cant meet the current requirements of the apparatus, such as miniaturization, high reliability and accuracy. Based on the piezoelectric actuation technique, this paper proposed and developed a solution proportioning technique of large dilution ratio. And on the basis of this technology we produced a physical prototype, in which piezoelectric vibrators are used as the main power units and control parts because piezoelectric vibrators are featured with low cost, compact volume, simple structure, non-pollution and others. The physical prototype can be used to dilute various sample solutions of various proportions for one or more times.

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Journal articles on the topic 'Piezoelectric actuation'

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