Contact analysis and modeling of standing wave linear ultrasonic motor

Shi, Yunlai; Zhao, Chunsheng; Zhang, Jianhui

doi:10.1007/s11595-011-0396-9

Cited by 29 publications

(19 citation statements)

References 8 publications

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“…The stator is composed of the metal base and piezoelectric ceramics (8), and they are patched together with conductive adhesives. The metal base can be further divided into the main body (9), the driving foot (10), the clamping part (11), and the fixing part (12). The mover-a is composed of the metal base, the piezoelectric ceramics (14), and the friction material (13).…”

mentioning

confidence: 99%

Design and optimization of a modal- independent linear ultrasonic motor

Zhou

Yao

2014

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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To simplify the design of the linear ultrasonic motor (LUSM) and improve its output performance, a method of modal decoupling for LUSMs is proposed in this paper. The specific embodiment of this method is decoupling of the traditional LUSM stator's complex vibration into two simple vibrations, with each vibration implemented by one vibrator. Because the two vibrators are designed independently, their frequencies can be tuned independently and frequency consistency is easy to achieve. Thus, the method can simplify the design of the LUSM. Based on this method, a prototype modal- independent LUSM is designed and fabricated. The motor reaches its maximum thrust force of 47 N, maximum unloaded speed of 0.43 m/s, and maximum power of 7.85 W at applied voltage of 200 Vpp. The motor's structure is then optimized by controlling the difference between the two vibrators' resonance frequencies to reach larger output speed, thrust, and power. The optimized results show that when the frequency difference is 73 Hz, the output force, speed, and power reach their maximum values. At the input voltage of 200 Vpp, the motor reaches its maximum thrust force of 64.2 N, maximum unloaded speed of 0.76 m/s, maximum power of 17.4 W, maximum thrust-weight ratio of 23.7, and maximum efficiency of 39.6%.

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confidence: 99%

Design and optimization of a modal- independent linear ultrasonic motor

Zhou

Yao

2014

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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“…A contact model, such as the one described in [24], is applied to relate the stator output performance and the actuator output performance. Specifically, it is used to determine the average actuator output thrust force, F o , and the output velocity, v o , in terms of the stator driving tip velocity in the transverse direction, u y (t), and the exerted normal force in the longitudinal direction, F * n (t).…”

Section: Actuator Output Performancementioning

confidence: 99%

“…In the simulation, the applied value for μ s is 0.55 for dry alumina ceramic-to-alumina ceramic contact [25]. The value for μ v is 0.05 [24]. The expression for the output force for square-wave voltage is also derived from Equation (7) using the estimated normal force profile in Equation (11):…”

Section: Performance Comparison With Single-frequency Drivementioning

confidence: 99%

Actuation of Linear Ultrasonic Motors with a Square-wave Based Excitation Voltage

Mills

Benhabib

2014

Ferroelectrics

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In this paper, a novel actuation approach is proposed for linear ultrasonic motors by applying a square-wave excitation voltage across the piezoceramic elements. Using this approach, the output force and power of the ultrasonic motor can be tangibly increased, without increasing its stator volume, thereby leading to improvement in the actuator power density. Added normal force is exerted on the moving stage by exciting the higher longitudinal resonant modes, the frequencies of which coincide with the harmonics of the square-wave voltage. The proposed approach is illustrated herein via the simulation of a suitably designed bimodal linear ultrasonic motor using finite-element analysis.

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“…Twiefel et al [15] conducted an experimental investigation on the measurement of the contact tip trajectory of a standing wave ultrasonic motor and pointed out that the trajectory was affected by contact behavior, which resulted in deformation of the elliptical motion. Shi et al [16,17] proposed a contact model for describing the contact mechanics of a standing wave linear ultrasonic motor without considering the deformation of elliptical trajectory of the driving tip. Li et al [18,19] studied the contact mechanics of a bimodal standing wave ultrasonic motor based on an analytical model in which the stick and slip dynamics were characterized.…”

Section: Introductionmentioning

confidence: 99%

Contact Modeling and Performance Evaluation of a Radial Standing Wave Ultrasonic Motor

Jiang

Dong

Jin

et al. 2019

Mathematical Problems in Engineering

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The focus of this paper is to propose a contact model of a radial standing wave ultrasonic motor in order to evaluate the motor performance accurately. The contact behavior between the stator and rotor is characterized by test and a continuous contact on the contact interface is confirmed. A contact model describing the continuous contact is then developed with analytical method. The stator vibration, the force transmission between the stator and rotor, and the output of the motor are analyzed. The impacts of different vibration amplitudes and structural parameters on the performances of the motor are evaluated based on the proposed model. Finally, a test platform for measuring the performance of the motor is built and torque-speed curves of the motor under different voltages are measured. The accuracy of the contact model is verified by comparison between measurement and calculation results. The proposed model not only can be used for design and optimization of the radial standing wave ultrasonic motor but also offers insight into the contact mechanics of standing wave ultrasonic motors.

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Contact analysis and modeling of standing wave linear ultrasonic motor

Cited by 29 publications

References 8 publications

Design and optimization of a modal- independent linear ultrasonic motor

Design and optimization of a modal- independent linear ultrasonic motor

Actuation of Linear Ultrasonic Motors with a Square-wave Based Excitation Voltage

Contact Modeling and Performance Evaluation of a Radial Standing Wave Ultrasonic Motor

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