Tunable asymmetric transmission of Lamb waves in piezoelectric bimorph plates by electric boundary design

Xia, Rongyu; Shao, Shixuan; Yi, Jianlin; Zheng, Kaihong; Negahban, Mehrdad; Li, Zheng

doi:10.1016/j.compstruct.2022.116111

Cited by 14 publications

(4 citation statements)

References 50 publications

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“…Active elastic metamaterials have active elements whose material properties are changed in response to external stimuli, such as electric [369][370][371][372][373][374][375][376][377][378][379][380][381][382][383][384], magnetic [385][386][387][388][389][390][391][392], light [393,394], and temperature [395][396][397][398][399] fields. The most widely used approach is to use piezoelectric materials in making the unit cell of an active metamaterial.…”

Section: Enhancing Practical Applications Of Elastic Metamaterialsmentioning

confidence: 99%

Elastic metamaterials for guided waves: from fundamentals to applications

Lee,

Kim

2023

Smart Mater. Struct.

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Guided waves, elastic waves propagating through bounded structures, play a pivotal role in various applications, including ultrasonic non-destructive testing and structural health monitoring. Recently, elastic metamaterials artificially engineered to exhibit physical properties not typically seen in nature have emerged as a ground-breaking approach, heralding a new era in guided wave-based technologies. These metamaterials offer innovative solutions to overcome the inherent constraints of traditional guided wave-based technology. This paper comprehensively reviews elastic metamaterials from their fundamental principles to diverse applications, focusing on their transformative impact in guided wave manipulation.

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Section: Enhancing Practical Applications Of Elastic Metamaterialsmentioning

confidence: 99%

Elastic metamaterials for guided waves: from fundamentals to applications

Lee,

Kim

2023

Smart Mater. Struct.

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“…Techniques such as time difference, phase difference, and Doppler methods are used to measure wind speed and direction in the field of ultrasonic wind detection. Recent research has focused on enhancing detection accuracy and ensuring system stability and anti-interference capabilities (Huang et al, 2009;Chen and Huang, 2015;Zhu and Semperlotti, 2016;Leng et al, 2019;Li et al, 2020;Xia et al, 2022). However, environmental temperature interference, sudden wind speed changes, and ultrasonic transducer performance can significantly affect detection accuracy in practical detection processes (Nguyen et al, 2020;Van et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Research on performance improvement of acoustic resonance-based wind sensors by using dual closed-loop control

Zeng,

Chen,

2023

Front. Energy Res.

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To achieve high-precision and high-stability detection of wind speed and direction in complex environments, this research proposes a dual closed-loop control scanning technique for the wind sensor system based on the acoustic resonance principle. This technique has been found to significantly enhance the system’s performance indicators. The acoustic resonance method used on wind sensors allows for the simultaneous modulation of frequency and intensity of signals generated by the transducer, resulting in linear scanning of the ultrasonic transducer. Frequency modulation resolves the issue of a resonance frequency shift caused by environmental factors like pressure and temperature, while intensity modulation addresses transducer performance degradation over time and can significantly improve the signal-to-noise ratio. However, when confronted with issues such as wind shear, the rapid change in the ambient pressure of the wind sensor may lead to the failure of the frequency modulation, followed by the change in the rate of wind shear, resulting in significant errors in wind speed detection. Therefore, the dual closed-loop control method is used to combine the frequency scanning modes—the slow and long scanning and the short and fast scanning. The slow and long scanning is used to solve the resonance frequency shift caused by various slow external changes and achieve frequency following, while the short and fast scanning resolves the resonance frequency shift resulting from rapid changes in wind shear and achieves rapid frequency following. Experimental results demonstrate that the scanning method employing dual closed-loop control can accurately measure wind speed and direction. The wind speed measurement range is 0–50 m/s, with a measurement accuracy of ±0.3 m/s (≤15 m/s)/±4% (>15 m/s), while the wind direction measurement range is 0°–360°, with a measurement accuracy of ±3°. After improvements, the system has high accuracy and stability and strong anti-interference ability and is less affected by environmental changes in complex environments.

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“…[16][17][18] Among various performances, asymmetric or unidirectional transmission is one of the promising applications in directiondependent energy flux for rectifying scenarios. At present, compared with the active control schemes [19][20][21] of asymmetric transmission, passive microstructure designs 22,23 attract wide attention because of their low cost and thin structure. In addition, the passive ways to achieve asymmetric transmission are mainly to utilize composite multilayer metasurfaces [24][25][26][27][28] or a loss-induced mechanism.…”

Section: Introductionmentioning

confidence: 99%

A single-layered elastic metasurface for switching wide-angle asymmetric transmission of flexural waves

Fan,

Wang,

Liu

et al. 2023

APL Materials

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A limitation of present elastic metasurfaces remains in their modest flexibility to meet convertible functions on demand. Here, a feasible single-layered lossless metasurface is theoretically proposed and experimentally demonstrated for adjusting the asymmetric transmission of flexural waves. The easily reconstructed unit is derived from multiple pillared resonators; then, the number of units per period can be changed depending on the desired integer parity. In addition, the asymmetric transmission is physically realized by the uneven diffraction of the ±1st orders in opposite fields of the designed metasurface. Requiring neither active modules nor passively multilayer or loss-induced strategies, our design using only a layer of lossless metasurface allows the elastic-wave behavior to switch between efficient symmetric and asymmetric transmissions. Furthermore, a high contrast ratio of transmitted energy is verified in experiments and simulations within a wide-angle range. The present work is connected with the pragmatic applications of metasurfaces in timely directional vibration control and compactly elastodynamic rectifications.

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Tunable asymmetric transmission of Lamb waves in piezoelectric bimorph plates by electric boundary design

Cited by 14 publications

References 50 publications

Elastic metamaterials for guided waves: from fundamentals to applications

Elastic metamaterials for guided waves: from fundamentals to applications

Research on performance improvement of acoustic resonance-based wind sensors by using dual closed-loop control

A single-layered elastic metasurface for switching wide-angle asymmetric transmission of flexural waves

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