Opposing preloads type ultrasonic linear motor with quadruped stator

Tanoue, Yutaro; Morita, Takeshi

doi:10.1016/j.sna.2019.111764

Cited by 25 publications

(24 citation statements)

References 14 publications

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“…These motors are usually small and efficient [ 13 , 14 ]. For example, some motors that use in-plane modes as their operating modes have an output speed and weight ratio of more than 20 times (the larger the ratio, the smaller the motor, the higher the output speed) [ 15 , 16 , 17 ]. These motors all have a common feature: their operating modes are composed of two or more different types of vibration modes [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

A Compact Linear Ultrasonic Motor Composed by Double Flexural Vibrator

Yin

Chen

et al. 2021

Micromachines

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A minimized linear ultrasonic motor was proposed, and two flexural bimorph vibrators were utilized to form its stator. The construction of the linear ultrasonic motor and its operation principle was introduced. Two working modes with the same local deformation distribution were chosen on the basis of Finite Element Analysis (FEA). To obtain its optimized structural parameters, sensitivities on frequency difference were calculated, and a way of decreasing the frequency difference of two working modes was introduced. A prototype of the optimized model was made. The modal testing of the stator and its performance evaluation was conducted. The modal testing results were in good agreement with that of the simulation. The maximum speed of the prototype is 245 mm/s, and its maximum thrust is 1.6 N.

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Section: Introductionmentioning

confidence: 99%

A Compact Linear Ultrasonic Motor Composed by Double Flexural Vibrator

Yin

Chen

et al. 2021

Micromachines

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“…He made a comparison between the axial and radial preloading methods and found that the radial preloading could bring higher speed, torque, and efficiency. Tanoue [12] carried out selective excitation for the vibration modes of different orders of linear motor, eliminating the need for preloading mechanisms with different performances. Jian [13] explored the stiffness and speed characteristics of the preloading mechanism under the change of preloading.…”

Section: Introductionmentioning

confidence: 99%

Preload Optimization Method for Traveling-Wave Rotary Ultrasonic Motor

et al. 2021

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Preload optimization is very important for ultrasonic motors’ design and application. In this paper, a novel method for a traveling-wave rotary ultrasonic motor is proposed. Firstly, based on linear regression and the analytic hierarchy process (AHP), the mapping between the drive characteristics, mechanical characteristics, speed stability, and preload of the traveling-wave-type rotary ultrasonic motor was established. Then, the characteristic curves of stalling torque, no-load speed, maximum efficiency, and speed stability with the change of preload method were measured with a new test platform. Finally, three traveling-wave rotary ultrasonic motors with optimized preload were used in a cooperative manipulator for validation. The experimental results showed that when the preload was optimized from 200 N to 310 N, the stalling torque of the motor increased by 20.7%, the maximum efficiency increased by 15.3%, the standard deviation of the speed decreased by 53.8%, and the no-load speed decreased by 5.5%. Therefore, it can be seen that the new preload optimization approach can significantly improve the performance indexes of ultrasonic motors and meet the practical requirements of direct-drive cooperative manipulators in engineering applications. The new preload optimization method offers advantages in motor output performance compared to conventional methods.

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“…The numerical simulation techniques, for example, the finite element (FE) method, finite volume (FV) method, is easy to address the modeling of stator with irregular structure and have been widely used as an aided tool for designing and investigating piezoelectric motors. With the aid of ANSYS software, a lot of BPLMs (Fan et al, 2018; Tanoue and Morita, 2020; Wang et al, 2018b; Zhu et al, 2016) were designed and the operation mechanism was analyzed. The adhesive layer effect was usually neglected in the design stage.…”

Section: Introductionmentioning

confidence: 99%

Modeling and simulation of bonded-type piezoelectric linear motors considering the stress transfer in adhesive layer

Yao

Dai

et al. 2021

Journal of Intelligent Material Systems and Structures

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This paper provides a general framework for modeling bonded-type piezoelectric linear motors considering the stress transferred by adhesive layer. A three-dimensional static model of stator is first developed by the principle of minimum potential energy and finite element. The stress transferred by adhesive layer could be simulated and analyzed for arbitrary bonding conditions. Basing on the static stress-transfer analysis, a quasi-static stress acted to substrate by piezoelectric elements is assumed and integrated into the substrate dynamic model. A pure mechanical dynamic model is developed for the electromechanical coupling system of stator. Furthermore, the whole-machine dynamic model of motor is presented by incorporating the frictional contact force into the dynamic model of the stator and an analytical model of the mover. Finally, a bonded-type piezoelectric linear motor with V-shaped stator is investigated as an example for simulations and experiments. The methodology presented here for simulating the transferred load of adhesive layer in bonded-type piezoelectric motor as well as for estimating the vibration characteristics of stator and output performances of motor. It is believed that the proposed method would be helpful to design and manufacture the prototypes due to the wider applicability of allowing for irregular geometry and any bonding conditions.

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Opposing preloads type ultrasonic linear motor with quadruped stator

Cited by 25 publications

References 14 publications

A Compact Linear Ultrasonic Motor Composed by Double Flexural Vibrator

A Compact Linear Ultrasonic Motor Composed by Double Flexural Vibrator

Preload Optimization Method for Traveling-Wave Rotary Ultrasonic Motor

Modeling and simulation of bonded-type piezoelectric linear motors considering the stress transfer in adhesive layer

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