The effects of thermo-mechanical load on the vibrational characteristics of ultrasonic vibration system

Zhao, Bo; Bie, Wenbo; Wang, Xiaobo; Chen, Fan; Wang, Yi; Chang, Baoqi

doi:10.1016/j.ultras.2019.05.005

Cited by 29 publications

(7 citation statements)

References 16 publications

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“…However, the application of ultrasonic osteotomy in orthopedic robots has not been reported yet [6]. Ultrasonic osteotomy is sensitive to cutting force, and the magnitude of cutting force can affect cutting stability (changing the resonance frequency and vibration amplitude of ultrasonic osteotomy), cutting quality, and thus affect surgical effectiveness [7]. Therefore, the measurement model of ultrasonic bone cutting force is an urgent problem to be solved in the application of ultrasonic osteotomy in robot assisted orthopedic surgery, which is of great significance for achieving bone layer perception and cutting force control during the surgical process.…”

Section: Introductionmentioning

confidence: 99%

Investigation of an indirect measurement method of ultrasonic bone cutting forces based on strain sensors

Wang,

Liu,

Cong

et al. 2023

Meas. Sci. Technol.

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The measurement model of ultrasonic bone cutting force is an urgent problem to be solved in the application of ultrasonic osteotomy in robot assisted orthopedic surgery, which is of great significance for achieving bone layer perception and cutting force control during the surgical process. This article proposes an indirect measurement method of ultrasonic bone cutting force based on strain. Firstly, according to the axial vibration strain distribution curve of the ultrasonic osteotomy, the optimal measurement position for the strain gauge is selected as the high strain position (with a high signal-to-noise ratio), and the temperature compensation strategy of the dual strain gauge method is used to reduce or eliminate the thermal effects during the strain measurement. Then, the Pearson correlation coefficient between strain and cutting force in different cutting directions is calculated, and there is a strong positive correlation between strain and cutting force. Finally, the least squares method was used to obtain indirect measurement models of ultrasonic bone cutting force based on strain in different cutting directions. The experimental results showed that the waveform of cutting force measured indirectly based on strain was in good agreement with the waveform of cutting force measured directly by the force sensor. The error between the effective value of indirect measurement of cutting force and the effective value of direct measurement of cutting force did not exceed 13%, which verified the feasibility and effectiveness of this method. The indirect measurement models of ultrasonic bone cutting force based on strain will become a cost-effective choice with good accuracy and high sensitivity, providing a theoretical basis for orthopedic robots to perceive and control cutting force, and promoting the clinical application of ultrasonic osteotomy in orthopedic robots.

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Section: Introductionmentioning

confidence: 99%

Investigation of an indirect measurement method of ultrasonic bone cutting forces based on strain sensors

Wang,

Liu,

Cong

et al. 2023

Meas. Sci. Technol.

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“…Hence, the performance of PUG is closely related to piezoelectric transducer (PT) load. Unlike conventional power adapters which have a relatively stable load, the PUG has a nonlinear high-frequency capacitive PT load which is quite unstable due to the variation of the thermo-mechanical load and self-heating effect of piezoelectric material in ultrasonic vibration system [17] , [18] , [19] . Generally, ultrasonic load driven by high-frequency mechanical vibration and friction of PT is subject to time-varying load caused by changes in operating conditions, such as driving frequency, power supply voltage, power supply current, load torque, and temperature rise, which results in the control characteristics of ultrasonic load are complex and highly nonlinear [20] .…”

Section: Introductionmentioning

confidence: 99%

Review of the design of power ultrasonic generator for piezoelectric transducer

Gao

Zhao

Wang

et al. 2023

Ultrasonics Sonochemistry

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“…Zhao et al [28] used the Kelvin−Voigt model to represent the contact force between an ultrasonic transducer and a workpiece, established a mass-spring-damper model for the ultrasonic transducer, and used the single-variable method to analyze the effects of the load and tool stiffness coefficient on the frequency and amplitude of the ultrasonic transducer. Zhao et al [29] used the four-terminal network method to establish a theoretical model for an ultrasonic drilling system with load.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the equivalent circuit and performance of an ultrasonic transducer under a force load

Rao,

Shi,

et al. 2023

Smart Mater. Struct.

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In ultrasonic processing technology applications, the force load can cause a drift in the resonance frequency of the ultrasonic transducer and significantly reduce its mechanical quality factor. The traditional equivalent circuit of an ultrasonic transducer can only be used to calculate performance parameters without a force load but not with a force load. Based on Mason’s equivalent circuit, a new equivalent circuit for ultrasonic transducers under a force load is derived while considering the effects of the force load on the material parameters and various types of losses in piezoelectric ceramics. Furthermore, performance parameters are analyzed, such as the resonance frequency, effective electromechanical coupling coefficient, and mechanical quality factor. The ultrasonic transducer sample is produced and the experimental platform is constructed for applying force loads on the ultrasonic transducer. The theoretical model is verified by static loading on the ultrasonic transducer. The proposed equivalent circuit provides theoretical guidance for tracking the exact resonance frequency and performance parameters of force-loading ultrasonic transducers.

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The effects of thermo-mechanical load on the vibrational characteristics of ultrasonic vibration system

Cited by 29 publications

References 16 publications

Investigation of an indirect measurement method of ultrasonic bone cutting forces based on strain sensors

Investigation of an indirect measurement method of ultrasonic bone cutting forces based on strain sensors

Review of the design of power ultrasonic generator for piezoelectric transducer

Investigation of the equivalent circuit and performance of an ultrasonic transducer under a force load

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