Finite element modeling and analysis on contact characteristics of a standing wave linear ultrasonic motor

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (16) : 42-50.

JIANG Chunrong1，XUE Xinyan1，LU Danhong1，JIN Long2

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Abstract

The contact and friction of ultrasonic motors is a critical factor affecting motor performance. Contact modeling of ultrasonic motors plays an important role in optimizing motor performance. Analytical method is widely adopted in existing researches on contact problems of standing wave ultrasonic motors, which requires many assumptions and is difficult to reflect actual motor structure and contact state accurately. The focus of this study is to model and analyze the contact characteristics of a standing wave linear ultrasonic motor using finite element method. Firstly, by considering the composite structure of the stator, a three-dimensional finite element model of the stator is established. The vibration response of the stator under applied voltage is simulated, and the solution of the stator displacement is obtained. Subsequently, a three-dimensional finite element model of contact between the stator and slider is proposed taking the structures and contact features of the stator and slider into account. The contact state and the contact pressure between the stator and slider are analyzed based on the proposed model. The influences of drive voltage and preload force on the contact characteristics and motor performances are also investigated. Finally, an experiment platform is built to measure the output performances of the motor. The measured values are compared with the calculated values. The comparison results validate the proposed three-dimensional finite element contact model.

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Linear ultrasonic motor / standing wave / finite element model / contact characteristics

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JIANG Chunrong1, XUE Xinyan1, LU Danhong1, JIN Long2. Finite element modeling and analysis on contact characteristics of a standing wave linear ultrasonic motor[J]. Journal of Vibration and Shock, 2024, 43(16): 42-50

References

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