Parallel resonant frequency tracking based on the static capacitance online measuring for a piezoelectric transducer

Di, Sisi; Wei, Fan; Li, Huafeng

doi:10.1016/j.sna.2017.12.014

Cited by 10 publications

(13 citation statements)

References 6 publications

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“…Although these control algorithms have strong reference significance, they all failed to achieve better dynamic performance. Di [ 12 ] proposed a parallel resonant frequency tracking method based on on-line measurement of static capacitance, but the initial frequency deviation in the experiment is about 20 times the bandwidth, and the large frequency deviation means that the number of trackings increases, so the frequency tracking needs to spend a lot of time. This effect will be superimposed with the transient response, which increases the difficulty of control.…”

Section: Introductionmentioning

confidence: 99%

RETRACTED: Transient Response Characteristics Analysis of High-Power Piezoelectric Transducers

Dong

Yang

2022

Micromachines

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To improve suitability in applications with high dynamic performance requirements, the transient response characteristics of high-power piezoelectric transducers should be studied quantitatively. This paper proposes the vector reduction method to solve the complex transient equations and obtains a transient matching scheme clarifying the mechanism of electrical matching resistance on electromechanical damping. A matching scheme with a combination of full-bridge inverter, transformer and series LC circuit is designed and validated, which can provide suitable electrical damping without causing energy losses. Consequently, the experiment verifies the transient properties of the proposed scheme. For a typical piezoelectric cutting transducer with 100.8 ms response time, our scheme is verified to have high dynamic performance within frequency response time of 5.5 ms and vibration response time of 15.0 ms.

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Section: Introductionmentioning

confidence: 99%

RETRACTED: Transient Response Characteristics Analysis of High-Power Piezoelectric Transducers

Dong

Yang

2022

Micromachines

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“…In order to detect the SVA and fp, the BVD equivalent circuit model can be transformed, as shown in Figure 2 [22].…”

Section: Theoretical Analysismentioning

confidence: 99%

Velocity Control of Traveling-Wave Ultrasonic Motors Based on Stator Vibration Amplitude

Fang

Yang

Zhu

et al. 2019

Sensors

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Nonlinearity and resonance frequency shift make it difficult to control the operation of the traveling-wave ultrasonic motors (TWUSMs) in a wide velocity and load range. In this paper, a velocity control scheme based on the stator vibration amplitude and the parallel resonance frequency (VCBVF) of TWUSMs is proposed. Then, the stator vibration amplitude (SVA) and parallel resonance frequency (fp) are detected by a transformer ratio-arm bridge. Based on the linear relationship between the velocity and the SVA of TWUSMs, the proposed scheme achieves the control of the mechanical loop and the electrical loop. The linear relationship between the velocity and the SVA makes the mechanical loop achieve the target velocity efficiently, according to the SVA, and the electrical loop could provide the target SVA quickly. Experimental results show that the response time of velocity is 3–4 ms under different load torques and the overshoot is less than 22%. In addition, the proposed scheme improves the efficiency of TWUSMs due to fp tracking. Due to directing the SVA control, the proposed scheme can heighten the velocity response and the load adaptability of TWUSMs, and promote the application of TWUSMs under various conditions.

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“…A procedure of transmission and acquisition of ultrasound is one of representative energy conversion between electrical domain and mechanical domain. An energy conversion efficiency between different domains can be primarily affected by various conditions such as an actuation voltage, a center frequency, a pulse shape, and an impedance matching [6][7][8][9][10][11][12][13][14][15][16]. These conditions are related to a nature of ultrasound transducer.…”

Section: Introductionmentioning

confidence: 99%

“…Previous works for high-power continuous actuation of transducer have focused on a conditioning of resonance state [6][7][8][9][10][11]. That is, a primary goal was to make a transducer impedance lowest and purely resistive so that the impedance phase becomes zero.…”

Section: Introductionmentioning

confidence: 99%

Center Frequency Tracking Scheme to Optimize Pulse-Echo Response of Ultrasonic A-mode Scanner Circuit System

Lee

2023

IEEE Access

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This paper proposes a center frequency tracking scheme to optimize a pulse-echo response of ultrasonic A-mode scanner. A pulse-echo response of A-mode scanner represents an overall energy conversion characteristic from an actuation to an acquisition. A center frequency for optimized pulse-echo response can be varied depending on an actuation voltage, an acoustic medium, etc. Most of previous frequency tracking methods have focused on high-power continuous actuation applications, and have relied on a monitoring of phase difference between actuating voltage and current with auxiliary sensors. This work focuses on a monitoring of a peak envelope of echo without additional sensors. We employ a momentum based gradient ascent algorithm along with a finite state machine to track an optimum center frequency so that a peak envelope of echo becomes the maximum value. The proposed frequency tracking scheme was implemented on a field programmable gate array for real-time operation. We performed repetitive measurements to verify consistent frequency tracking performances for different acoustic mediums. The A-mode scanner adaptively tracked corresponding center frequencies for each of mediums within an average error of 61.7 kHz. When the A-mode scanner was in a steady state, an increment of signal-to-noise ratio (SNR) of echo was 7.4 dB, and an axial resolution was improved by 32.5 %.INDEX TERMS Center frequency tracking, A-mode ultrasound, gradient-ascent algorithm, momentum optimization, finite state machine, field programmable gate array, A-mode scanner circuit system.

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Parallel resonant frequency tracking based on the static capacitance online measuring for a piezoelectric transducer

Cited by 10 publications

References 6 publications

RETRACTED: Transient Response Characteristics Analysis of High-Power Piezoelectric Transducers

RETRACTED: Transient Response Characteristics Analysis of High-Power Piezoelectric Transducers

Velocity Control of Traveling-Wave Ultrasonic Motors Based on Stator Vibration Amplitude

Center Frequency Tracking Scheme to Optimize Pulse-Echo Response of Ultrasonic A-mode Scanner Circuit System

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