Actuation displacement performance change of pre-stressed piezoelectric actuators attached to a flat surface

Goo, Nam Seo; Phan, Van Phuoc; Park, Hoon Cheol

doi:10.1088/0964-1726/18/3/037003

Cited by 6 publications

(7 citation statements)

References 12 publications

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“…Furthermore, the resistance value r(t) on the WB changing as frequency of 2ω can be expressed as: (10) where ε(2ω) is the rate of detection resistance variation that contributes to the vibration amplitude at a frequency of 2ω and θ s is the vibrational phase shift.…”

Section: Self-actuating and Self-sensing Of Mems Cantilever Sensorsmentioning

confidence: 99%

“…The choice of excitation mechanism by which the electrical energy is reciprocally converted to the mechanical vibration plays a critical role in the overall performance. The most commonly used excitation mechanisms are electrostatic [9], piezoelectric [10], and thermal actuations [11]. Moreover, several other energy conversion processes could be utilized to actuate vibrations in a cantilever sensor, such as electromagnetic Lorentz forces [12,13].…”

Section: Introductionmentioning

confidence: 99%

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Improvement of frequency responses of an in-plane electro-thermal cantilever sensor for real-time measurement

Setiono¹,

Nyang’au²,

Fahrbach³

et al. 2019

J. Micromech. Microeng.

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Resonance-based sensors ordinarily show a symmetrical amplitude shape, which is accompanied by a monotonic transition as its phase response. At its resonance state, there is a 90° phase difference between the excitation force and the system response. Nevertheless, due to some parasitic factors, resonance-based sensors might show non-ideal frequency response as seen in in-plane electro-thermal piezoresistive cantilever sensors (EtPCSs). Because of a direct thermal parasitic coupling from the excitation part to the sensing part, the sensor output shows an asymmetric amplitude shape and a reversing phase response. In some EtPCS that have relatively lower thermal exposure on their sensing part, a symmetrical amplitude shape could be demonstrated but was still accompanied with a low magnitude of monotonical phase response. In this work, a method of reference subtraction was introduced to enhance the frequency response of the EtPCS at changing ambient conditions (e.g. humidity, temperature, smoke exposure). As a result, we obtained optimized frequency responses suitable for a phaselocked loop-based system to carry out resonant-frequency tracking in real-time.

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Section: Self-actuating and Self-sensing Of Mems Cantilever Sensorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improvement of frequency responses of an in-plane electro-thermal cantilever sensor for real-time measurement

Setiono¹,

Nyang’au²,

Fahrbach³

et al. 2019

J. Micromech. Microeng.

View full text Add to dashboard Cite

show abstract

“…The piezoelectric strain constant, d, of the PZT generally depends on the compressive stress perpendicular to the polar axis (Krueger, 1967(Krueger, , 1968. With regard to a lightweight piezocomposite curved actuator, Goo et al (2009) concluded that the piezoelectric strain constant increases on account of the rise in lateral compressive stress during the curing process. They defined " d 31 À Á…”

Section: The Effect Of Residual Stress On the Piezoelectric Strain Constantmentioning

confidence: 99%

“…In order to calculate the changes in piezoelectric strain constants, we use the residual stress shown in Figures 57 and the dependence of the in-plane compressive stress on the piezoelectric strain constants shown in Figure 8. The change in the strain constant, Ád 3x can be calculated in the same manner as Goo et al (2009), from the equation:…”

Section: The Effect Of Residual Stress On the Piezoelectric Strain Constantmentioning

confidence: 99%

Use of a Piezocomposite Generating Element in Energy Harvesting

Tien

Goo

2010

Journal of Intelligent Material Systems and Structures

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In this work, we propose a high performance piezocomposite generating element (PCGE), which can be used in energy harvesting applications and evaluate its electricity generating performance. The effectiveness of the PCGE is verified with numerical and experimental data. The PCGE is composed of layers of carbon/epoxy, piezoelectric lead zirconate titanate (PZT) ceramic, and glass/epoxy cured at an elevated temperature. The results of this study reveal that the output voltage of the PCGE under vibration is affected considerably by variations in the layup configurations of the PCGEs and residual stress after the curing process. In particular, each laminated structure has a distinctive moment arm and bending stiffness, both of which affect the generating performance of the PCGE. Besides the effect of the layup configuration, the curing process causes the PCGE to have residual stress in the PZT layer because of a mismatch in the coefficients of thermal expansion between the constituent layers. This residual stress generally causes a change in the voltage coefficient, g31, of the PZT layer. The ANSYSTM program was used to conduct a finite element analysis of the stress distribution in the PCGE. For the experimental tests, three kinds of PCGE layup configuration are subjected to vibration in order to validate theoretical predictions and verify the PCGEs’ capability of converting oscillatory mechanical energy into electrical energy. The experimental results confirm that the electricity generating performance can be enhanced by a proper design of the PCGE.

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“…In this study, we assumed that the piezoelectric strain coefficient variations D d 31 and D d 32 , similar to those of Goo et al (2009), can be expressed as…”

Section: Nonlinear Piezoelectric Materials Propertiesmentioning

confidence: 99%

A study on the piezoelectric actuation performance of prestressed piezoelectric unimorph actuators

Kang

2014

Journal of Intelligent Material Systems and Structures

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The actuation performances of the prestressed piezoelectric unimorph actuators piezoelectric unimorph with mechanically prestressed substrate and thin layer unimorph driver are evaluated in terms of actuation displacement and force. During the performance tests, these prestressed piezoelectric unimorph actuators showed highly nonlinear behavior, in which their actuation performances were not proportional to the magnitude of the applied voltage, although normally they exhibit higher actuation performances at higher driving voltages. This means that the nominal piezoelectric material properties from the standard method were no longer valid for evaluating and predicting the actuation performances of the piezoelectric unimorph with mechanically prestressed substrate and thin layer unimorph driver actuators under high-voltage application. In this article, the nonlinear piezoelectric material properties, especially the elastic modulus and the piezoelectric strain coefficient, were obtained by considering the prestress, the applied voltage, and the re-poling treatment of the piezoelectric material inside the prestressed piezoelectric unimorph. Finally, actuation performance simulations were conducted using the nonlinear material properties, and the analytical results were compared and validated with the experimental results.

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Actuation displacement performance change of pre-stressed piezoelectric actuators attached to a flat surface

Cited by 6 publications

References 12 publications

Improvement of frequency responses of an in-plane electro-thermal cantilever sensor for real-time measurement

Improvement of frequency responses of an in-plane electro-thermal cantilever sensor for real-time measurement

Use of a Piezocomposite Generating Element in Energy Harvesting

A study on the piezoelectric actuation performance of prestressed piezoelectric unimorph actuators

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