Creep Effect Analysis at the Friction Interface of a Rotary Ultrasonic Motor

Chen, Chao; She, Chongmin

doi:10.1142/s1758825115500313

Cited by 7 publications

(1 citation statement)

References 29 publications

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“…Zhang et.al [ 20 ] developed the Dahl model to avoid discontinuities of contact forces in both left and right directions of motion for V-shape linear ultrasonic motors. In addition, the dead zone [ 21 ], wear of the friction interface [ 22 ], and change of pre-pressure [ 23 ] are also frequently related to contact friction [ 24 ]. The friction exacerbates the nonlinearity of the vibration of the stator in an ultrasonic motor, which has led to more complex nonlinear dynamics and has further complicated the nonlinear problems of TRUM as a whole.…”

Section: Introductionmentioning

confidence: 99%

A Design Method of Traveling Wave Rotary Ultrasonic Motors Driving Circuit under High Voltage Using Single-Sided Hertzian Contact Forced Oscillator Model

Huang

Zhao

et al. 2022

Micromachines

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Traveling wave rotary ultrasonic motors (TRUMs) are widely used in various industrial processes due to their attractive features, such as compact structure, high accuracy, and fast response. However, the major limiting factors of the operational performance of TRUMs under high-voltage excitation are the nonlinear behavior caused by the nonlinearities of the piezoelectric materials and the friction between the stator and rotor of the motor. In this study, a nonlinear dynamics model and an identification method are presented to directly design the driver circuit for suppressing the nonlinear behavior under high voltage excitation. Firstly, by studying the time–frequency characteristics of the isolated electrode voltage, a single-sided Hertzian contact forced oscillator model of TRUMs is established, involving the nonlinearities of the piezoelectric material and friction. Secondly, a harmonic balance nonlinear identification is proposed in the time domain for TRUMs. The influence of the voltage and preload on the nonlinear phenomena is discussed. Lastly, a novel driver circuit is proposed to suppress the nonlinearities using feedback from the isolated electrode. Experiments showed that the total harmonic distortion decreased by 89.4% under 500 Vpp. The proposed drive circuit design method is used to find a high excitation voltage and preload to achieve greater motor output power.

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Section: Introductionmentioning

confidence: 99%

A Design Method of Traveling Wave Rotary Ultrasonic Motors Driving Circuit under High Voltage Using Single-Sided Hertzian Contact Forced Oscillator Model

Huang

Zhao

et al. 2022

Micromachines

View full text Add to dashboard Cite

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An I-shape linear piezoelectric actuator using resonant type longitudinal vibration transducers

Liu

Yan

et al. 2016

Mechatronics

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Mechanical drift modeling and analysis of V-shaped linear ultrasonic motors with a flexible clamp

et al. 2020

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The flexible clamp used in linear ultrasonic motors (LUMs) not only supports the motor but also simplifies the structure and improves the vibration characteristics. However, the flexible clamp causes the mechanical drift phenomenon, leading to a reduction in positional accuracy. To solve this problem, the mechanical drift mechanism and the control methods of V-shaped LUMs are investigated in this work. First, a mechanical model of the stator of a LUM with a flexible clamp is established to analyze the reason for the mechanical drift. Then, based on the mechanical model, the rules of the appearance of mechanical drift in clamping components with different stiffnesses and shapes are studied. The results indicate that mechanical drift is obvious when the stiffnesses of the two flexible clamps are different, whereas it hardly occurs when clamping components with tremendous tangential stiffnesses are used. Finally, two new types of V-shaped LUM stators that have a flexible clamp on one side and an analogous straight-beam clamp on the other side are proposed. Experiments were conducted to validate the mechanical model analysis and the clamp drift findings, and the results demonstrate that the novel motors have little mechanical drift and stable running characteristics and can be used in precision motion platforms.

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Creep Effect Analysis at the Friction Interface of a Rotary Ultrasonic Motor

Cited by 7 publications

References 29 publications

A Design Method of Traveling Wave Rotary Ultrasonic Motors Driving Circuit under High Voltage Using Single-Sided Hertzian Contact Forced Oscillator Model

A Design Method of Traveling Wave Rotary Ultrasonic Motors Driving Circuit under High Voltage Using Single-Sided Hertzian Contact Forced Oscillator Model

An I-shape linear piezoelectric actuator using resonant type longitudinal vibration transducers

Mechanical drift modeling and analysis of V-shaped linear ultrasonic motors with a flexible clamp

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