Pub Date : 2024-03-16DOI: 10.1177/1045389x241227000
Song Chen, Zijian Huang, Wentao Cheng, Xuan Fang, Yilei Xie, Zhonghua Zhang, Jiantao Wang, Junwu Kan
A pneumatic piezoelectric linear actuator (PPLA) is proposed, which possesses the advantages of low power consumption, environmental friendliness, and high linearity of positioning. The prototype of the PPLA consists of a piezoelectric gas pump with serial chambers and a cylinder. The piezoelectric gas pump with serial chambers is designed with a wedge valve and flexible support structure, which results in high output performance and meets the working requirements of pneumatic linear actuators. Prototypes of PPLA are designed and manufactured. Experiments are conducted to investigate the effect of chamber height, driving voltage, and driving frequency on the performance of the PPLA. The experimental results indicate that increasing the chamber height enhances the output performance of the PPLA. At 250 Vpp and 120 Hz, the PPLA achieves a maximum output velocity of 16.62 mm/min and is able to handle a maximum load of 11 N. Additionally, an injection simulation experiment using zebrafish embryos is conducted, which confirms the high control accuracy and linearity of the PPLA. The experiment demonstrates the potential application of the PPLA in the field of cell manipulation.
{"title":"Design of a piezoelectric pneumatic linear actuator in cell manipulation","authors":"Song Chen, Zijian Huang, Wentao Cheng, Xuan Fang, Yilei Xie, Zhonghua Zhang, Jiantao Wang, Junwu Kan","doi":"10.1177/1045389x241227000","DOIUrl":"https://doi.org/10.1177/1045389x241227000","url":null,"abstract":"A pneumatic piezoelectric linear actuator (PPLA) is proposed, which possesses the advantages of low power consumption, environmental friendliness, and high linearity of positioning. The prototype of the PPLA consists of a piezoelectric gas pump with serial chambers and a cylinder. The piezoelectric gas pump with serial chambers is designed with a wedge valve and flexible support structure, which results in high output performance and meets the working requirements of pneumatic linear actuators. Prototypes of PPLA are designed and manufactured. Experiments are conducted to investigate the effect of chamber height, driving voltage, and driving frequency on the performance of the PPLA. The experimental results indicate that increasing the chamber height enhances the output performance of the PPLA. At 250 Vpp and 120 Hz, the PPLA achieves a maximum output velocity of 16.62 mm/min and is able to handle a maximum load of 11 N. Additionally, an injection simulation experiment using zebrafish embryos is conducted, which confirms the high control accuracy and linearity of the PPLA. The experiment demonstrates the potential application of the PPLA in the field of cell manipulation.","PeriodicalId":16121,"journal":{"name":"Journal of Intelligent Material Systems and Structures","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140148441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hysteresis nonlinearity widely exists in the piezoelectric actuator (PEA), and the hysteresis nonlinearity has strong dynamic characteristics that lead to deterioration of tracking performance. To decrease the positioning error caused by hysteresis nonlinearity, a generalized Bouc-Wen (GBW) hysteresis model and its compensation method are proposed in this paper. First, based on the Bouc-Wen hysteresis model, two asymmetric terms and a second-order IIR filter are applied to describe the asymmetric hysteresis and high-frequency phase lag characteristics of PEA. Then, the model parameters with strong relevance to frequency variation are modified as frequency-dependent parameters. Meanwhile, based on the particle swarm optimization (PSO) algorithm, a novel parameter identification algorithm is designed for identifying the parameters of GBW hysteresis model. Then, an inverse feedforward controller is constructed based on the GBW hysteresis model, and a composite compensation control algorithm combining PID controller and repetitive controller is developed to reduce the unmodeled dynamics errors and unknown external disturbances. Finally, the comparison experiment results show that the accuracy and performance of the GBW model proposed in this paper are much better than the classical Bouc-Wen (CBW) model and the enhanced Bouc-Wen (EBW) model, and the developed compensation controller has excellent control performance and robustness.
{"title":"Modeling, identification, and high-speed compensation study of dynamic hysteresis nonlinearity for piezoelectric actuator","authors":"Minrui Zhou, Zhihui Dai, Zhenhua Zhou, Xin Liu, Taishan Cao, Zhanhui Li","doi":"10.1177/1045389x231225492","DOIUrl":"https://doi.org/10.1177/1045389x231225492","url":null,"abstract":"Hysteresis nonlinearity widely exists in the piezoelectric actuator (PEA), and the hysteresis nonlinearity has strong dynamic characteristics that lead to deterioration of tracking performance. To decrease the positioning error caused by hysteresis nonlinearity, a generalized Bouc-Wen (GBW) hysteresis model and its compensation method are proposed in this paper. First, based on the Bouc-Wen hysteresis model, two asymmetric terms and a second-order IIR filter are applied to describe the asymmetric hysteresis and high-frequency phase lag characteristics of PEA. Then, the model parameters with strong relevance to frequency variation are modified as frequency-dependent parameters. Meanwhile, based on the particle swarm optimization (PSO) algorithm, a novel parameter identification algorithm is designed for identifying the parameters of GBW hysteresis model. Then, an inverse feedforward controller is constructed based on the GBW hysteresis model, and a composite compensation control algorithm combining PID controller and repetitive controller is developed to reduce the unmodeled dynamics errors and unknown external disturbances. Finally, the comparison experiment results show that the accuracy and performance of the GBW model proposed in this paper are much better than the classical Bouc-Wen (CBW) model and the enhanced Bouc-Wen (EBW) model, and the developed compensation controller has excellent control performance and robustness.","PeriodicalId":16121,"journal":{"name":"Journal of Intelligent Material Systems and Structures","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140072616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-07DOI: 10.1177/1045389x241233794
Liang Wang, Heran Wang
A new stick-slip type piezoelectric actuator based on asymmetric structure is proposed. The actuator uses a stator with the asymmetric diamond-shaped structure, and the structure size is determined by finite element simulation. First, the structure and working principle of the proposed actuator are introduced. The elongation deformation of the piezo stack is transferred to the driving tip by the used asymmetric diamond-shaped hinge. This produces a diagonal movement on the driving tip, with the lateral motion used for driving and the longitudinal motion used for pressing the slider, respectively. Then, the statics analysis of the proposed piezoelectric actuator is performed by finite element simulation. The simulated displacements of the driving tip under different structures are obtained, and then the structure size is determined. Finally, an experimental system is established to study the performance of the proposed piezoelectric actuator. The experimental results show that the maximum output velocity of the proposed actuator is 5.26 mm/s. The maximum output force is 1.9N when the locking force is 2N and the drive frequency is 660 Hz.
{"title":"A new stick-slip type piezoelectric actuator based on asymmetric diamond-shaped flexure hinge structure","authors":"Liang Wang, Heran Wang","doi":"10.1177/1045389x241233794","DOIUrl":"https://doi.org/10.1177/1045389x241233794","url":null,"abstract":"A new stick-slip type piezoelectric actuator based on asymmetric structure is proposed. The actuator uses a stator with the asymmetric diamond-shaped structure, and the structure size is determined by finite element simulation. First, the structure and working principle of the proposed actuator are introduced. The elongation deformation of the piezo stack is transferred to the driving tip by the used asymmetric diamond-shaped hinge. This produces a diagonal movement on the driving tip, with the lateral motion used for driving and the longitudinal motion used for pressing the slider, respectively. Then, the statics analysis of the proposed piezoelectric actuator is performed by finite element simulation. The simulated displacements of the driving tip under different structures are obtained, and then the structure size is determined. Finally, an experimental system is established to study the performance of the proposed piezoelectric actuator. The experimental results show that the maximum output velocity of the proposed actuator is 5.26 mm/s. The maximum output force is 1.9N when the locking force is 2N and the drive frequency is 660 Hz.","PeriodicalId":16121,"journal":{"name":"Journal of Intelligent Material Systems and Structures","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140072615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-04DOI: 10.1177/1045389x241231322
Feng-Lian Li, Shi-Jie Fan, Yu-Qi Hao, Mei Lv
Based on the hyperbolic tangent parabola mixed shear deformation theory, the paper studied the sound radiation and the sound insulation of the functionally graded (FG) sandwich microplates under thermal-electric effects. The sandwich plate is composed of piezoelectric skin layers and FGM core layer. By using Hamilton’s principle, a size-dependent model considering the thermal-piezoelectric effects are established. The acoustic response and sound insulation are calculated with Rayleigh integral and solid-fluid coupling conditions. The accuracy of the presented method is verified by the numerical simulations. Then the effects of various parameters on the vibro-acoustic characteristics are analyzed and discussed. Numerical results show that the temperature variations, the length scale parameter to thickness ratio and the gradient index have great impacts on the FG sandwich microplates.
{"title":"Analysis of vibro-acoustic characteristics of functionally graded sandwich microplates under thermal-electric effects","authors":"Feng-Lian Li, Shi-Jie Fan, Yu-Qi Hao, Mei Lv","doi":"10.1177/1045389x241231322","DOIUrl":"https://doi.org/10.1177/1045389x241231322","url":null,"abstract":"Based on the hyperbolic tangent parabola mixed shear deformation theory, the paper studied the sound radiation and the sound insulation of the functionally graded (FG) sandwich microplates under thermal-electric effects. The sandwich plate is composed of piezoelectric skin layers and FGM core layer. By using Hamilton’s principle, a size-dependent model considering the thermal-piezoelectric effects are established. The acoustic response and sound insulation are calculated with Rayleigh integral and solid-fluid coupling conditions. The accuracy of the presented method is verified by the numerical simulations. Then the effects of various parameters on the vibro-acoustic characteristics are analyzed and discussed. Numerical results show that the temperature variations, the length scale parameter to thickness ratio and the gradient index have great impacts on the FG sandwich microplates.","PeriodicalId":16121,"journal":{"name":"Journal of Intelligent Material Systems and Structures","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140033905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper introduces a novel type of magnetorheological fluid (MRF) mount designed to achieve wide-frequency vibration isolation for engines. While previous studies have explored vibration isolation using hydraulic mounts, there has been limited research on achieving wideband isolation with MRF mounts. Consequently, this paper presents an innovative MRF mount structure and investigates wideband vibration isolation control for engines. Initially, experiments with a multi-channel MRF damper validate the switchable operation of controllable channels. A novel controllable multi-inertia channel MRF mount system is proposed, aligning the working mode of controllable inertia channels with that of the MRF damper. The lumped parameter method is employed to derive the mathematical model of the MRF mount, and its high and low-frequency dynamic characteristics are thoroughly examined. Subsequently, a real-time multi-island genetic algorithm-optimized controller is developed to investigate wideband vibration isolation within the MRF mount system. The findings indicate that: (1) The MRF mount demonstrates adjustable low-frequency dynamic stiffness and loss angle within the frequency range of f = 0–50 Hz. In the frequency range of f = 50–100 Hz, the mount achieves its lowest dynamic stiffness value, effectively addressing the issue of high-frequency stiffening. (2) The real-time multi-island genetic optimized controller exhibits superior vibration isolation performance compared to traditional sky-hook control and hybrid sky-hook control methods, achieving optimal vibration isolation for the mount.
{"title":"New bell plate controlled multi-inertia channel magnetorheological fluid mount wide frequency vibration isolation control study","authors":"Zhihong Lin, Yunxiao Chen, Mingzhong Wu, Feijie Zheng","doi":"10.1177/1045389x241233352","DOIUrl":"https://doi.org/10.1177/1045389x241233352","url":null,"abstract":"This paper introduces a novel type of magnetorheological fluid (MRF) mount designed to achieve wide-frequency vibration isolation for engines. While previous studies have explored vibration isolation using hydraulic mounts, there has been limited research on achieving wideband isolation with MRF mounts. Consequently, this paper presents an innovative MRF mount structure and investigates wideband vibration isolation control for engines. Initially, experiments with a multi-channel MRF damper validate the switchable operation of controllable channels. A novel controllable multi-inertia channel MRF mount system is proposed, aligning the working mode of controllable inertia channels with that of the MRF damper. The lumped parameter method is employed to derive the mathematical model of the MRF mount, and its high and low-frequency dynamic characteristics are thoroughly examined. Subsequently, a real-time multi-island genetic algorithm-optimized controller is developed to investigate wideband vibration isolation within the MRF mount system. The findings indicate that: (1) The MRF mount demonstrates adjustable low-frequency dynamic stiffness and loss angle within the frequency range of f = 0–50 Hz. In the frequency range of f = 50–100 Hz, the mount achieves its lowest dynamic stiffness value, effectively addressing the issue of high-frequency stiffening. (2) The real-time multi-island genetic optimized controller exhibits superior vibration isolation performance compared to traditional sky-hook control and hybrid sky-hook control methods, achieving optimal vibration isolation for the mount.","PeriodicalId":16121,"journal":{"name":"Journal of Intelligent Material Systems and Structures","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140017852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A local-resonance piezoelectric phononic crystal consisting of a quadrangular prism piezoelectric scatterer polarized along the z-axis and wrapped by a plexiglass layer is proposed in this work. The short-circuit external electrical boundary condition is selectively added to the upper and lower surfaces of the piezoelectric scatterer to tune the distribution of polarized charges generated by the localized vibration modes. The band structures of the unit cell are calculated using the finite element method, where the upper boundary of the second complete bandgap is replaced by a passband of type of quadrupole local resonance mode. This passband lies entirely in the second bandgap under the open-circuit external electrical condition. The results of the band structures are verified by the transmission loss of the semi-infinite structure in the frequency domain. Two piezoelectric waveguides with complex paths are designed, showing that elastic waves propagate completely along the given waveguide paths at a particular frequency range. The proposed phononic crystals without additional circuit elements can be assembled into waveguides with arbitrary reconfigurable paths, transmitting elastic waves.
本研究提出了一种局域共振压电声子晶体，由沿 Z 轴极化的四棱柱压电散射体和有机玻璃层包裹而成。压电散射体的上下表面选择性地添加了短路外部电边界条件，以调整局部振动模式产生的极化电荷分布。使用有限元法计算了单位晶胞的带状结构，其中第二个完整带隙的上边界被四极局部共振模式类型的通带所取代。在开路外部电气条件下，该通带完全位于第二带隙内。频域中半无限结构的传输损耗验证了带结构的结果。设计了两个具有复杂路径的压电波导，表明在特定频率范围内，弹性波可以完全沿着给定的波导路径传播。所提出的声子晶体无需额外的电路元件，即可组装成具有任意可重新配置路径的波导，从而传输弹性波。
{"title":"Reconfigurable local-resonance elastic waveguides in piezoelectric phononic crystals plate","authors":"Xiao-Wei Sun, Gang-Gang Xu, Ren-Sheng Li, Mao-Ting Tan, Xing-Lin Gao, Wei-Bin Sun","doi":"10.1177/1045389x241232728","DOIUrl":"https://doi.org/10.1177/1045389x241232728","url":null,"abstract":"A local-resonance piezoelectric phononic crystal consisting of a quadrangular prism piezoelectric scatterer polarized along the z-axis and wrapped by a plexiglass layer is proposed in this work. The short-circuit external electrical boundary condition is selectively added to the upper and lower surfaces of the piezoelectric scatterer to tune the distribution of polarized charges generated by the localized vibration modes. The band structures of the unit cell are calculated using the finite element method, where the upper boundary of the second complete bandgap is replaced by a passband of type of quadrupole local resonance mode. This passband lies entirely in the second bandgap under the open-circuit external electrical condition. The results of the band structures are verified by the transmission loss of the semi-infinite structure in the frequency domain. Two piezoelectric waveguides with complex paths are designed, showing that elastic waves propagate completely along the given waveguide paths at a particular frequency range. The proposed phononic crystals without additional circuit elements can be assembled into waveguides with arbitrary reconfigurable paths, transmitting elastic waves.","PeriodicalId":16121,"journal":{"name":"Journal of Intelligent Material Systems and Structures","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140003131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-27DOI: 10.1177/1045389x241233354
Jishuo Wang, Di Yuan, Qin Ying, Bao Li, Weifeng Yuan
Piezoelectric energy harvester (PEH) is being world widely studied by many researchers due to their excellent advantages over batteries. Therefore, how to improve the capability of energy harvesting has become a hot research topic. In this study, based on the theory that the electromechanical coupling coefficient is proportional to the difference of mode shape slopes at the two ends of a piezoelectric sheet made of macro fiber composite, a modified cantilever structure consisting of two segments is proposed. The piezoelectric sheet is affixed on the segment close to the fixed end, while the segment containing the free end is rotated by 90° along its axial direction. The mode shape of the cantilever structure is calculated based on the Euler-Bernoulli beam theory. Prototypes of the conventional and modified PEHs are fabricated and tested. Compared to the conventional one, the experimental result of the modified PEH demonstrates that the electromechanical coupling coefficient is enhanced by 600%, and the output power is increased by more than 300%. The proposed PEH is simple, highly efficient, and easy-realized.
{"title":"Harvesting vibration energy through a cantilever beam with enhanced harvesting capability","authors":"Jishuo Wang, Di Yuan, Qin Ying, Bao Li, Weifeng Yuan","doi":"10.1177/1045389x241233354","DOIUrl":"https://doi.org/10.1177/1045389x241233354","url":null,"abstract":"Piezoelectric energy harvester (PEH) is being world widely studied by many researchers due to their excellent advantages over batteries. Therefore, how to improve the capability of energy harvesting has become a hot research topic. In this study, based on the theory that the electromechanical coupling coefficient is proportional to the difference of mode shape slopes at the two ends of a piezoelectric sheet made of macro fiber composite, a modified cantilever structure consisting of two segments is proposed. The piezoelectric sheet is affixed on the segment close to the fixed end, while the segment containing the free end is rotated by 90° along its axial direction. The mode shape of the cantilever structure is calculated based on the Euler-Bernoulli beam theory. Prototypes of the conventional and modified PEHs are fabricated and tested. Compared to the conventional one, the experimental result of the modified PEH demonstrates that the electromechanical coupling coefficient is enhanced by 600%, and the output power is increased by more than 300%. The proposed PEH is simple, highly efficient, and easy-realized.","PeriodicalId":16121,"journal":{"name":"Journal of Intelligent Material Systems and Structures","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140003210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A new piezoelectric actuator with flexible mechanism using stick-slip principle based on the frog-leg inspiration is developed in this work. It utilizes bipedal design, and the slider can be driven by only one foot or two feet alternately, which depends on the exciting situation of the used two PZT stacks. The extension of the PZT stack can be transmitted into the vertical and horizontal deformations on two driving feet due to the frog-leg inspiration. They are used to press and actuate the slider. The configuration of this actuator is presented and its working principle is illustrated. Finite element simulation is carried out to investigate the statics performance. A prototype of the proposed actuator is fabricated and series of mechanical output characteristics are measured. The results demonstrated that the proposed actuator obtained the output velocity of 4.23 mm/s when the voltage and frequency were 100 V and 400 Hz. The maximum vertical loading capacity was 9 N under the voltage of 100 V. The corresponding results in this work validated the feasibility of the proposed bipedal piezoelectric actuator with flexible mechanism based on the frog-leg inspiration.
本研究基于蛙腿的灵感，利用粘滑原理开发了一种具有灵活机制的新型压电致动器。它采用双足设计，滑块可由一只脚或两只脚交替驱动，这取决于所使用的两个 PZT 叠层的激励情况。PZT 叠层的伸展可以通过蛙腿的启发作用传递到两个驱动脚上的垂直和水平变形。它们用于按压和驱动滑块。本文介绍了这种致动器的构造，并说明了其工作原理。为研究其静态性能，还进行了有限元模拟。制作了拟议致动器的原型，并测量了一系列机械输出特性。结果表明，当电压和频率分别为 100 V 和 400 Hz 时，拟议制动器的输出速度为 4.23 mm/s。在电压为 100 V 时，最大垂直负载能力为 9 N。这项工作中的相应结果验证了基于蛙腿启发提出的具有灵活机制的双足压电致动器的可行性。
{"title":"Development of a bipedal piezoelectric actuator with flexible mechanism based on the frog-leg inspiration","authors":"Tinghai Cheng, Yushan Sun, Peng Ning, Xiaohui Lu, Heran Wang, Liang Wang","doi":"10.1177/1045389x241230570","DOIUrl":"https://doi.org/10.1177/1045389x241230570","url":null,"abstract":"A new piezoelectric actuator with flexible mechanism using stick-slip principle based on the frog-leg inspiration is developed in this work. It utilizes bipedal design, and the slider can be driven by only one foot or two feet alternately, which depends on the exciting situation of the used two PZT stacks. The extension of the PZT stack can be transmitted into the vertical and horizontal deformations on two driving feet due to the frog-leg inspiration. They are used to press and actuate the slider. The configuration of this actuator is presented and its working principle is illustrated. Finite element simulation is carried out to investigate the statics performance. A prototype of the proposed actuator is fabricated and series of mechanical output characteristics are measured. The results demonstrated that the proposed actuator obtained the output velocity of 4.23 mm/s when the voltage and frequency were 100 V and 400 Hz. The maximum vertical loading capacity was 9 N under the voltage of 100 V. The corresponding results in this work validated the feasibility of the proposed bipedal piezoelectric actuator with flexible mechanism based on the frog-leg inspiration.","PeriodicalId":16121,"journal":{"name":"Journal of Intelligent Material Systems and Structures","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139981186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-23DOI: 10.1177/1045389x241229104
Kamal K Bera, Souryadeep Biswas, Arnab Banerjee
The phenomena of damping enhancement and higher decay coefficient are obtained by introducing a piezoelectric transducer at the resonating unit of the metamaterial. The difference between the damping ratio of the piezo-transducer controlled and that of the equivalent uncontrolled metamaterial is termed metadamping, and thereby it is used to indicate the enhancement of energy dissipation characteristics. The optimum inductance and resistance of the impregnated piezo-transducer are computed to minimize the response of the outer mass of a unit cell by implementing [Formula: see text] optimization technique. A parametric study is conducted after applying Bloch’s theorem, and the enhancement of damping over the complete Brillouin zone is determined to get a comprehension of the metadamping phenomenon. Impregnation of the piezo-transducer at the resonating unit not only enhances the normalized bandwidth more than twice but also significantly increases the damping emergence when compared to the equivalent uncontrolled metamaterial. This envisioned the promise of high-stiff, high-damped metamaterial for enhanced transient vibration control as well as wider attenuation bandgap.
{"title":"Optimized piezo-shunted metadamping towards the high-stiff high-damped metamaterial","authors":"Kamal K Bera, Souryadeep Biswas, Arnab Banerjee","doi":"10.1177/1045389x241229104","DOIUrl":"https://doi.org/10.1177/1045389x241229104","url":null,"abstract":"The phenomena of damping enhancement and higher decay coefficient are obtained by introducing a piezoelectric transducer at the resonating unit of the metamaterial. The difference between the damping ratio of the piezo-transducer controlled and that of the equivalent uncontrolled metamaterial is termed metadamping, and thereby it is used to indicate the enhancement of energy dissipation characteristics. The optimum inductance and resistance of the impregnated piezo-transducer are computed to minimize the response of the outer mass of a unit cell by implementing [Formula: see text] optimization technique. A parametric study is conducted after applying Bloch’s theorem, and the enhancement of damping over the complete Brillouin zone is determined to get a comprehension of the metadamping phenomenon. Impregnation of the piezo-transducer at the resonating unit not only enhances the normalized bandwidth more than twice but also significantly increases the damping emergence when compared to the equivalent uncontrolled metamaterial. This envisioned the promise of high-stiff, high-damped metamaterial for enhanced transient vibration control as well as wider attenuation bandgap.","PeriodicalId":16121,"journal":{"name":"Journal of Intelligent Material Systems and Structures","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139951107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Harvesting energy from flow using vortex-induced vibration (VIV) piezoelectric transducers has gained significant attention in recent decades due to their advantages, such as simple structure, blade-less layout, and low maintenance costs. However, most existing studies have focused on designing and analyzing a single piezoelectric energy harvester (PEH), without investigating the fluid-structure interaction and coupling of multiple PEH arrays. Here, we conducted an experimental study using a 2 × 2 PEH array to investigate its dynamic response under different wind speeds and spacings. Results show that the output voltage of the PEH array increases as the vertical spacing decreases, and the maximum average output voltage of 20.6 V per PEH is obtained when the minimum vertical spacing, maximum horizontal spacing, and resonance wind speed conditions are met. Compared to a single PEH, the 2 × 2 array arrangement increases the average output voltage by up to 168%. Additionally, the average output power under the resistance of 1 MΩ increases by 629% to 4.3×10−4 W per PEH, and the maximum output power increases by 792% to 5.3×10−4. Experiments indicate that the vortex shedding coupling can induce higher vibration in a well-defined array, which paves a new way for developing bladeless wind farms.
{"title":"VIV array for wind energy harvesting","authors":"Shilei Chen, Yuanyi Wang, Rujun Song, Yongsheng Gao, Zuankai Wang, Zhengbao Yang","doi":"10.1177/1045389x241230569","DOIUrl":"https://doi.org/10.1177/1045389x241230569","url":null,"abstract":"Harvesting energy from flow using vortex-induced vibration (VIV) piezoelectric transducers has gained significant attention in recent decades due to their advantages, such as simple structure, blade-less layout, and low maintenance costs. However, most existing studies have focused on designing and analyzing a single piezoelectric energy harvester (PEH), without investigating the fluid-structure interaction and coupling of multiple PEH arrays. Here, we conducted an experimental study using a 2 × 2 PEH array to investigate its dynamic response under different wind speeds and spacings. Results show that the output voltage of the PEH array increases as the vertical spacing decreases, and the maximum average output voltage of 20.6 V per PEH is obtained when the minimum vertical spacing, maximum horizontal spacing, and resonance wind speed conditions are met. Compared to a single PEH, the 2 × 2 array arrangement increases the average output voltage by up to 168%. Additionally, the average output power under the resistance of 1 MΩ increases by 629% to 4.3×10<jats:sup>−4</jats:sup> W per PEH, and the maximum output power increases by 792% to 5.3×10<jats:sup>−4</jats:sup>. Experiments indicate that the vortex shedding coupling can induce higher vibration in a well-defined array, which paves a new way for developing bladeless wind farms.","PeriodicalId":16121,"journal":{"name":"Journal of Intelligent Material Systems and Structures","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139951109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：