Pulse mode of operation of a spherical piezoceramic transducer filled with liquid and having a correcting electric circuit

Коновалов, С. И.; Kuz’menko, A. G.

doi:10.1121/1.3500691

Cited by 4 publications

(3 citation statements)

References 8 publications

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“…The analysis of published materials [4][5][6][7][8][9][10][11][12][13][14][15][16] indicates 06022-2 that in the design support for detecting distortions in the parameters of pulses of acoustic location systems, the greatest success was achieved in non-destructive testing [5][6][7][8][9][10][11][12][13]. This is due to the use of a simpler and more advanced numerical method for determining the parameters of pulses -the method of equivalent electromechanical circuits [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…This is due to the use of a simpler and more advanced numerical method for determining the parameters of pulses -the method of equivalent electromechanical circuits [4,5]. Using this method, the influence on the parameters of pulses during emission of sound energy into solids is determined by the design parameters of the transducer [6], the multilayer design of the transducer [7,8], the electromechanical coupling coefficient of the piezoceramic parameters of the transducer [9], the shape of the transducer [10,11], correcting electric circuits [12] and the "emissionreception" system as a whole [13].…”

Section: Introductionmentioning

confidence: 99%

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Experimental Data on Dynamic Changes of Radio Pulses When They are Emitted by Piezoceramic Electromechanical Transducers

Leiko¹,

Дерепа²,

Pozdniakova³

et al. 2021

J. Nano- Electron. Phys.

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The article discusses the issue of distortion of acoustic signals emitted by piezoelectric transducers in relation to electrical excitation signals. It has been shown experimentally that in acoustic locating systems, exciting electrical pulse signals differ significantly from the acoustic pulses emitted by them. The study was carried out on a cylindrical piezoceramic transducer. The reason for these differences is the presence of piezoceramic electromechanical transducers in radar systems. Their resonant oscillatory systems are formed by two circuits, electrical and mechanical, interconnected by an ideal electromechanical transformer. The physical properties of these contours differ significantly in their purposes and properties. The electrical circuit of the converter is involved only in the conversion of energy, and its mechanical circuit is involved both in the conversion of energy and in its formation in the environment. The main difference in the properties of the circuits is the significant inertia of the mechanical circuit as a mechanical resonant oscillatory system and the inertia of the medium loading it when sound is emitted. This explains the occurrence of transient processes during the formation of acoustic pulses and their absence during the formation of electrical pulses. The distortions of acoustic pulses caused by transient processes have been experimentally established. They consist of a smooth rise of the leading edge of the acoustic pulse and the decay of its rear front, as well as the appearance at the beginning and at the end of short, sharp "bursts" of acoustic pressure amplitudes. It is shown that the magnitude and nature of the manifestation of dynamic distortions of acoustic pulses depend on the ratio of frequencies of harmonic filling of electrical pulses and the frequency of mechanical resonance of a piezoceramic electromechanical transducer. Filling frequencies of 3.5, 7 and 10 kHz were investigated, which correspond to frequencies below the mechanical resonance of the transducer, the resonance frequency, and frequencies above the mechanical resonance. It is concluded that it is necessary to assess the resolution of acoustic locating devices based on their acoustic pulses of radiation and reception.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Data on Dynamic Changes of Radio Pulses When They are Emitted by Piezoceramic Electromechanical Transducers

Leiko¹,

Дерепа²,

Pozdniakova³

et al. 2021

J. Nano- Electron. Phys.

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“…Wang and Ding (2008) used the 3D exact piezoelectricity theory to study a spherically isotropic piezoelectric hollow spherical sensor of arbitrary wall thickness designed to estimate the external dynamic pressure by measuring the electric potential difference between the internal and external surfaces. Konovalov and Kuz’menko (2010a, 2010b) investigated pulsed radiation mode of thin-walled underwater piezoelectric spherical transducers with a correcting electric inductive–resistive circuit for different filling materials. Hu et al (2010) used the classical bending shell theory and normal mode method to investigate axisymmetric dynamic response of a hollow radially polarized thin piezoelectric sphere submerged in a compressible viscous fluid medium.…”

Section: Introductionmentioning

confidence: 99%

Active sound radiation control of a submerged piezocomposite hollow sphere

Hasheminejad

Gudarzi

2014

Journal of Intelligent Material Systems and Structures

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A spatial state-space approach based on the linear three-dimensional exact piezoelasticity theory along with the Helmholtz equations for the internal/external acoustic domains are employed to describe the coupled vibroacoustic response of an arbitrarily thick, spherically isotropic, functionally graded, radially polarized piezolaminated hollow sphere, immersed in and filled with ideal compressible fluids, and under the actions of arbitrary (non-axisymmetric) distributed time-harmonic transverse mechanical excitations at its inner and/or outer boundaries. A frequency domain subspace–based identification technique is applied to estimate the coupled fluid-structure dynamics of the system in the controller design stage. Subsequently, a standard linear quadratic Gaussian optimal controller is synthesized and simulated based on the identified model, and the optimal control input voltages for suppressing the sensor output voltage (total radiated power) of the submerged sphere are calculated for selected weighting parameters associated with the system response and control input. Numerical simulations establish the effectiveness of the selected (partial/full) sensor/actuator configuration in conjunction with the adopted control strategy for attenuating the predicted sound radiation response of an air-filled, water-submerged, sandwich piezocomposite (PZT4/steel/PZT4) sphere, in both frequency and time domains. Also, the trade-off between dynamic performance and control effort penalty is examined for impulsive and Gaussian random external mechanical disturbances. Furthermore, the effect of piezoelectric material gradient variation on sound radiation control performance of the smart piezocomposite structure is briefly discussed. The validity of the acousto-elastic model is demonstrated by use of a commercial finite element package as well as by comparison with the data available in the literature.

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On the reducing of the acoustic signal length from the piezoelectric transducers of the sea ice monitoring systems

Konovalov

Коновалов

et al. 2019

J. Phys.: Conf. Ser.

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The solution of navigation problems the ice situation problems in the Arctic region need to study the acoustic parameters and local reflective properties of ice in real conditions. Information about the local sea ice acoustic properties essentially helps to solve the problems of statistical forecasting of reflective and scattering properties of ice cover. The successful solution of these problems mostly depends on the metrological parameters of the probing signals emitted by the primary piezoelectric transducers. This means, that to increase the resolution of the control and measuring equipment it is better to radiate and to receive short acoustic pulses. The article presents the results of analysis the pulse mode of operation of cylindrical piezoelectric transducers designed to measure the velocity of sound in sea ice. To reduce the length of acoustic pulses, an inductive-resistive load is connected to the electrical input of the radiator. The length and the amplitude of the emitted acoustic pulse were estimated using equivalent circuits of piezoelectric transducers and a spectral method based on the Fourier transforms. The optimal parameters of the electrical circuit, ensuring the minimum length of the acoustic pulses are calculated. The technique of possible measurements is described. The results are presented in the most general form, making possible to use them within different frequency ranges.

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Pulse mode of operation of a spherical piezoceramic transducer filled with liquid and having a correcting electric circuit

Cited by 4 publications

References 8 publications

Experimental Data on Dynamic Changes of Radio Pulses When They are Emitted by Piezoceramic Electromechanical Transducers

Experimental Data on Dynamic Changes of Radio Pulses When They are Emitted by Piezoceramic Electromechanical Transducers

Active sound radiation control of a submerged piezocomposite hollow sphere

On the reducing of the acoustic signal length from the piezoelectric transducers of the sea ice monitoring systems

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