Investigation of dissipative properties of electro-viscoelastic structure with resistive-shunted piezoelectric element

Development of an electrical analogue for modeling natural vibrations of a viscoelastic structure with piezoelectric element

Journal of Intelligent Material Systems and Structures ◽

10.1177/1045389x20983881 ◽

2021 ◽

Vol 32 (3) ◽

pp. 369-384

Author(s):

Dmitrii Oshmarin ◽

Nataliya Sevodina ◽

Nataliia Iurlova ◽

Maksim Iurlov

Keyword(s):

Piezoelectric Element ◽

Problem Formulation ◽

Electromechanical System ◽

Model Parameters ◽

Electrical Model ◽

Natural Vibrations ◽

Viscoelastic System ◽

Electric Circuits ◽

Viscoelastic Structure ◽

Lumped Parameters

This paper focuses on the development of an equivalent electrical model with lumped parameters capable of describing the natural vibrations of an electromechanical system comprising a viscoelastic structure with a piezoelectric element attached to its surface. The important advantage of the model is that it takes into account the energy losses associated with the viscoelastic properties of the material of the main structure. Two versions of the equivalent electric analogue of the initial electro-viscoelastic system in the form of electric circuits, the elements of which are described by the real or complex quantities, are considered. The approaches to the formulation of the problem of natural vibrations in the developed electric analogue are based on Kirchhoff’s laws for electric circuits and Ohm’s law for alternating current. Special attention is paid to the identification of model parameters. A procedure for determining the parameters for the equivalent electrical model is based on the results gained from the solution of a coupled problem of natural vibrations of the initial electromechanical system; problem formulation is also given here. The effectiveness and reliability of the developed equivalent electric models with lumped parameters for the determination of complex eigenfrequencies of the electromechanical system containing energy dissipation elements are demonstrated by analyzing the behavior of structures in the form of a rectangular plate and a semi-cylindrical shell.

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Study of fluid flow through a channel deformed by piezoelement

Multiphase Systems ◽

10.21662/mfs2018.3.001 ◽

2018 ◽

Vol 13 (3) ◽

pp. 1-10 ◽

Cited By ~ 2

Author(s):

I.Sh. Nasibullayev ◽

E.Sh Nasibullaeva ◽

O.V. Darintsev

Keyword(s):

Fluid Flow ◽

Pressure Drop ◽

Boundary Conditions ◽

Flow Rate ◽

Contact Surface ◽

Piezoelectric Element ◽

Neumann Boundary ◽

Differential Pressure ◽

Physical Parameters ◽

Flow Through

The flow of a liquid through a tube deformed by a piezoelectric cell under a harmonic law is studied in this paper. Linear deformations are compared for the Dirichlet and Neumann boundary conditions on the contact surface of the tube and piezoelectric element. The flow of fluid through a deformed channel for two flow regimes is investigated: in a tube with one closed end due to deformation of the tube; for a tube with two open ends due to deformation of the tube and the differential pressure applied to the channel. The flow rate of the liquid is calculated as a function of the frequency of the deformations, the pressure drop and the physical parameters of the liquid.

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The application of piezoelectric element in developing a new digital Annubar flowmeter

SICE '99. Proceedings of the 38th SICE Annual Conference. International Session Papers (IEEE Cat. No.99TH8456) ◽

10.1109/sice.1999.788592 ◽

2003 ◽

Author(s):

Mo Deju ◽

Ding Yanqing ◽

Wu Youhua

Keyword(s):

Piezoelectric Element

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Baseline-free sensor fault detection for piezoelectric array

Journal of Intelligent Material Systems and Structures ◽

10.1177/1045389x211018853 ◽

2021 ◽

pp. 1045389X2110188

Author(s):

Qibo Mao ◽

Yuande Wang ◽

Shizuo Huang

Keyword(s):

Prior Knowledge ◽

Frequency Response Function ◽

Sensor Array ◽

Piezoelectric Element ◽

Piezoelectric Sensor ◽

Steel Beam ◽

Sensor Fault ◽

Pass Filter ◽

Sensor Fault Detection ◽

High Pass

In this study, a new methodology is presented to detect the sensor fault for piezoelectric array based on the filtered frequency response function (FRF) shapes. The proposed method does not require prior knowledge about healthy piezoelectric array. First, the imaginary parts of FRFs from the piezoelectric array during vibration are measured and normalized to obtain the FRF shapes in different frequencies. Then the irregularities in these FRF shapes are extracted by using high-pass filter with properly chosen cut-off frequency. These abnormal irregularities on the filtered FRF shape curves indicate the location of the faulty sensor, due to the irregularity of FRF shapes introduced by the faulty piezoelectric element. The proposed sensor fault method is experimentally demonstrated on a clamped-clamped steel beam mounted with piezoelectric buzzer array. Two common piezoelectric sensor fault types including sensor breakage and debonding are evaluated. The experimental results indicate that the proposed method has great potential in the detection of the sensor fault for piezoelectric array as it is simple and does not require the FRF data of the healthy sensor array as a baseline.

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Power-Generation Optimization Based on Piezoelectric Ceramic Deformation for Energy Harvesting Application with Renewable Energy

Energies ◽

10.3390/en14082171 ◽

2021 ◽

Vol 14 (8) ◽

pp. 2171

Author(s):

Hyeonsu Han ◽

Junghyuk Ko

Keyword(s):

Power Generation ◽

Renewable Energy ◽

Energy Harvesting ◽

Piezoelectric Material ◽

Lead Zirconate Titanate ◽

Piezoelectric Ceramic ◽

Piezoelectric Element ◽

Piezoelectric Ceramics ◽

Lead Zirconate ◽

Piezoelectric Energy

Along with the increase in renewable energy, research on energy harvesting combined with piezoelectric energy is being conducted. However, it is difficult to predict the power generation of combined harvesting because there is no data on the power generation by a single piezoelectric material. Before predicting the corresponding power generation and efficiency, it is necessary to quantify the power generation by a single piezoelectric material alone. In this study, the generated power is measured based on three parameters (size of the piezoelectric ceramic, depth of compression, and speed of compression) that contribute to the deformation of a single PZT (Lead zirconate titanate)-based piezoelectric element. The generated power was analyzed by comparing with the corresponding parameters. The analysis results are as follows: (i) considering the difference between the size of the piezoelectric ceramic and the generated power, 20 mm was the most efficient piezoelectric ceramic size, (ii) considering the case of piezoelectric ceramics sized 14 mm, the generated power continued to increase with the increase in the compression depth of the piezoelectric ceramic, and (iii) For piezoelectric ceramics of all diameters, the longer the depth of deformation, the shorter the frequency, and depending on the depth of deformation, there is a specific frequency at which the charging power is maximum. Based on the findings of this study, PZT-based elements can be applied to cases that receive indirect force, including vibration energy and wave energy. In addition, the power generation of a PZT-based element can be predicted, and efficient conditions can be set for maximum power generation.

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Design Study of a Round Window Piezoelectric Transducer for Active Middle Ear Implants

Sensors ◽

10.3390/s21030946 ◽

2021 ◽

Vol 21 (3) ◽

pp. 946

Author(s):

Dong Ho Shin

Keyword(s):

Hearing Loss ◽

Sensorineural Hearing Loss ◽

Middle Ear ◽

Piezoelectric Transducer ◽

Round Window ◽

Piezoelectric Element ◽

Sensorineural Hearing ◽

Flat Band ◽

Middle Ear Implants ◽

Output Characteristics

This report describes the design of a new piezoelectric transducer for round window (RW)-driven middle ear implants. The transducer consists of a piezoelectric element, gold-coated copper bellows, silicone elastomer (polydimethylsiloxane, PDMS), metal cylinder (tungsten), and titanium housing. The piezoelectric element is fixed to the titanium housing and mechanical resonance is generated by the interaction of the bellows, PDMS, and tungsten cylinder. The dimensions of PDMS and the tungsten cylinder with output characteristics suitable for compensation of sensorineural hearing loss were derived by mechanical vibrational analysis (equivalent mechanical model and finite element analysis (FEA)). Based on the results of FEA, the RW piezoelectric transducer was implemented, and bench tests were performed under no-load conditions to confirm the output characteristics. The transducer generates an average displacement of 219.6 nm in the flat band (0.1–1 kHz); the resonance frequency is 2.3 kHz. To evaluate the output characteristics, the response was compared to that of an earlier transducer. When driven by the same voltage (6 Vp), the flat band displacement averaged 30 nm larger than that of the other transducer, and no anti-resonance was noted. Therefore, we expect that the new transducer can serve as an output device for hearing aids, and that it will improve speech recognition and treat high-frequency sensorineural hearing loss more effectively.

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