Light-activated piezoelectric linear motor by using a serial bimorph made of an optopiezoelectric composite

Chen, Tsun-Hsu; Chu, Tsung-Yu; Lin, Yu‐Min; Lin, Shih-Jue; Gu, Jen‐Tau; Hsu, Yu-Hsiang

doi:10.1088/1361-665x/aadc35

Cited by 3 publications

(2 citation statements)

References 22 publications

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“…Adopting the structure modal characteristics to produce specific traveling waves has become the main direction. Chen et al [17] proposed a new method to activate and control the piezoelectric linear motor by using a light source through transparent electrodes and photoconductive coating. When the frequency matched the switching frequency, the piezoelectric linear motor had the optimal mechanical characteristics.…”

Section: Introductionmentioning

confidence: 99%

Design and investigation of a new piezoelectric beam transportation device based on two-mode excitation

Zhu¹,

Li²,

Wang³

et al. 2021

Smart Mater. Struct.

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A new piezoelectric beam transportation device is designed and its dynamic characteristics are investigated for object transportation in this paper. Based on the Euler-Bernoulli beam theory and Lagrange equation, the theoretical model is established, in which Chebyshev polynomials are adopted as the admissible displacement function. First, the correctness of the model was verified by ANSYS software, and good convergence and accuracy were shown. Then, the influence of excitation parameters and piezoelectric patches on traveling wave generation was studied by response simulation. And finally, the effects of excitation frequency, voltage amplitude, phase, position, and the number of supporting legs on transportation speed were investigated by setting up an experimental device. The results indicated that excitation parameters impact transportation speed extremely. What's more, the excitation frequency should be the median of adjacent natural frequencies, and the phase should be orthogonal for transportation speed and stability in unison.

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Section: Introductionmentioning

confidence: 99%

Design and investigation of a new piezoelectric beam transportation device based on two-mode excitation

Zhu¹,

Li²,

Wang³

et al. 2021

Smart Mater. Struct.

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“…These two actuators can be two composite piezoelectric actuators (Tomikawa et al, 1989) or two external piezoelectric actuators (Dehez et al, 2010;Loh and Ro, 2000). By adopting this method on a 1D plate, it can serve as a miniaturized robot to move on a flat surface in one direction (Chen et al, 2018;Hariri et al, 2014Hariri et al, , 2015.…”

Section: Introductionmentioning

confidence: 99%

Development of a two-dimensional piezoelectric traveling-wave generator

Lin

Hsu

et al. 2020

Journal of Intelligent Material Systems and Structures

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In this article, we present a new method to control the direction of traveling waves in either an x-direction or y-direction on a two-dimensional square plate. The core structure was composed of a piezoelectric serial bimorph with four electrodes. Each electrode was spatially designed to activate one of the bending modes and which included the ability to reduce adjacent modes and minimize interference. Our new method differs from other reported methods in that the four electrodes were driven at designated resonant frequencies. In our wave generator, different driving amplitudes and phases were applied to induce the traveling waves to propagate in a specific direction. To design the directional movement and to better understand the pattern of induced traveling waves, an analytical solution was derived to assist in the design of the four driving electrodes. Using our newly developed analytical method, traveling waves can be controlled to travel in either the x-direction or y-direction using two different sets of electrodes, where each electrode can be driven at a specific but different bending mode. We found that both the voltage ratio and phase difference between the two driving electrodes are important factors for optimization.

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A Gated Two-Frequency Two-Mode Method for Piezoelectric Motorization

Hsu

Chu

Lin

et al. 2021

ASME Letters in Dynamic Systems and Control

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In this study, we present a new driving method to generate traveling waves in a finite plate for the application of piezoelectric motorizations. Due to resonant modes which dominate the vibration of finite structures, methods to reduce resonant effects such as using an electric sinker or driving at a non-resonant frequency, have been reported. To take the advantage of natural resonance and to increase driving efficiency, a new method entitled a gated two-frequency-two-mode (G-TFTM) was developed. A piezoelectric bimorph of 1.1g weight with two rectangular actuators was implemented to verify the design concept. One actuator was operated at a first bending mode and the other actuator operated at a second bending mode with phase difference. The driving signal was gated to generate an intermittent excitation to provide a periodic propulsion. To determine the profile of the induced traveling wave, an analytical solution was derived and a numerical model was used. Using these design tools, we experimentally verified that traveling waves can be generated using a G-TFTM method. A 0.1 g object can be moved at a speed of 3.31 mm/s under the condition of a 70-to-20 voltage ratio and a 137-degree phase difference. The moving direction was found to be reversed by changing the phase to -43 degrees. The experimental and numerical data are detailed in this paper to demonstrate the feasibility of this G-TFTM method.

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Light-activated piezoelectric linear motor by using a serial bimorph made of an optopiezoelectric composite

Cited by 3 publications

References 22 publications

Design and investigation of a new piezoelectric beam transportation device based on two-mode excitation

Design and investigation of a new piezoelectric beam transportation device based on two-mode excitation

Development of a two-dimensional piezoelectric traveling-wave generator

A Gated Two-Frequency Two-Mode Method for Piezoelectric Motorization

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