Design of a Semi-Oval Shaped Ultrasonic Motor

2013 ◽  
Vol 7 (5) ◽  
pp. 537-543 ◽  
Author(s):  
Shine-Tzong Ho ◽  
◽  
Yan-Jhang Shin
Keyword(s):  
Thrust Force ◽  
Low Voltage ◽  
Contact Point ◽  
Mechanical Vibration ◽  
Sine Wave ◽  
Ultrasonic Motor ◽  
Vibration Modes ◽  
Element Analysis ◽  
Linear Ultrasonic Motor ◽  
Maximum Thrust

A low voltage drive linear ultrasonic motor with a semi-oval shaped stator is proposed in this paper. In the stator, two multilayer piezoelectric actuators are clamped in the holder of the stator by pre-stressing to excite a semi-oval ring. The semi-oval shaped stator is designed to have normal vibration and tangential vibration modes, thus these two orthogonal mechanical vibration modes of the stator can be excited to generate elliptical motion at the contact point of the stator. In design of the motor, ANSYS finite element analysis software was used in this study to accomplish the design and analysis. A prototype motor was fabricated and measured. For single phase signal driving, typical output of the prototype is a no-load speed of 88 mm/s and maximum thrust force of 1.96 N at a voltage of 16 Vp. For two sine wave signals driving, typical output of the prototype is a no-load speed of 106 mm/s and maximum thrust force of 3.33 N at a voltage of 16 Vp.

scholarly journals A Compact Linear Ultrasonic Motor Composed by Double Flexural Vibrator

Micromachines ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 958
Author(s):  
Jiayin Li ◽  
Yin Wang ◽  
Ziyan Chen ◽  
Fang Cheng ◽  
Qing Yu
Keyword(s):  
Structural Parameters ◽  
Ultrasonic Motor ◽  
Local Deformation ◽  
Frequency Difference ◽  
Modal Testing ◽  
Maximum Speed ◽  
Element Analysis ◽  
Linear Ultrasonic Motor ◽  
Optimized Model ◽  
Maximum Thrust

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.

Research of a Ring-Type Linear Ultrasonic Motor

2011 ◽  
Vol 211-212 ◽  
pp. 254-258
Author(s):  
Jun Kao Liu ◽  
Wei Shan Chen ◽  
Zhen Yu Xue
Keyword(s):  
Traveling Wave ◽  
Transient Analysis ◽  
Ultrasonic Motor ◽  
Maximum Speed ◽  
Vibration Modes ◽  
Bending Vibration ◽  
Ring Type ◽  
Linear Ultrasonic Motor ◽  
Working Principle ◽  
Elliptical Motion

A new ring-type linear ultrasonic motor is proposed in this study. In this new design, bending vibration traveling wave is generated in a long ring by two groups of PZT ceramics bonded on the inner sides of the linear beams. Elliptical trajectory motions can be formed at particles on the teeth, which can realize the linear driving by frictional force. The working principle of the proposed design is introduced. Two bending vibration modes that have a phase difference of 90deg on space are analyzed. The elliptical motion trajectory of node on the tooth gained by the transient analysis verifies the excitation of bending traveling wave. A prototype motor is fabricated and measured, and a maximum speed of 15mm/s is reached.

A single-modal linear ultrasonic motor based on multi vibration modes of PZT ceramics

Ultrasonics ◽  
2020 ◽  
Vol 107 ◽  
pp. 106158 ◽  
Author(s):  
Danhong Lu ◽  
Qiuxiang Lin ◽  
Bingxun Chen ◽  
Chunrong Jiang ◽  
Xia Hu
Keyword(s):  
Ultrasonic Motor ◽  
Vibration Modes ◽  
Pzt Ceramics ◽  
Linear Ultrasonic Motor

Study of Rotary-Linear Ultrasonic Motor Output Shafts

2016 ◽  
Vol 10 (4) ◽  
pp. 549-556 ◽  
Author(s):  
Ayato Kanada ◽  
◽  
Tomoaki Mashimo ◽  
Kazuhiko Terashima ◽  
Keyword(s):  
Radial Direction ◽  
Thrust Force ◽  
Ultrasonic Motor ◽  
Generation Mechanism ◽  
Order Accuracy ◽  
Design Concepts ◽  
Linear Ultrasonic Motor ◽  
Output Torque ◽  
Inner Surface ◽  
Through Hole

We propose output shafts with a preload generation mechanism to improve the output torque and thrust force of the rotary-linear ultrasonic motor. The stator is comprised of a single metallic cube with a through-hole, and the output shafts are inserted into the hole to generate motion in both its circumferential and axial directions arbitrarily. In this paper, two design concepts for optimizing the preload using the output shafts are examined. The first involves a cylinder shaft with micron-order accuracy diameter realization. The cylinder shaft makes contact with the entire inner surface of the stator and generates a preload between the stator and shaft. The second concept employs a spring shaft having a slightly larger diameter than the stator hole, which expands in the radial direction and generates the preload. Experiments show that these design concepts improve the output torque and thrust force.

Design and Analysis of a Linear Ultrasonic Motor with Composite Bending and Torsional Vibration Modes

2014 ◽  
Vol 945-949 ◽  
pp. 1327-1332 ◽  
Author(s):  
He Long Wang ◽  
Wei Shan Chen ◽  
Jun Kao Liu
Keyword(s):  
Torsional Vibration ◽  
Transient Analysis ◽  
Structural Parameters ◽  
Ultrasonic Motor ◽  
Vibration Modes ◽  
Bending Vibration ◽  
First Order ◽  
Linear Ultrasonic Motor ◽  
New Type ◽  
Working Principle

A new type linear ultrasonic motor using Second-order bending and First-order torsional modes (2B-1T) is proposed. The ultrasonic motor has two driving feet and the continuous linear motions of sliders are realized by the frictional force between stator and sliders. In this new design, bending vibration is excited by d33 mode, which controls the preload pressure, and torsional vibration is excited by d15 mode, which generates the driving force. The elliptical trajectories of both feet are achieved, when the phase difference of the two modes is 90° in time and space. The working principle of ultrasonic motor using 2B-1T is simulated. A parametric model of the stator is designed. The sensitive analyses of structural parameters are gained with modal analysis. The characteristics and trajectories of driver feet are studied by transient analysis. These results can provide theoretical basis for the development of this new type ultrasonic motor.

Non-Resonance Type Linear Ultrasonic Motor Using Multilayer Piezoelectric Actuators with Parallel Beams

2016 ◽  
Vol 10 (4) ◽  
pp. 557-563 ◽  
Author(s):  
Manabu Aoyagi ◽  
◽  
Ryuichi Nakayasu ◽  
Hidekazu Kajiwara ◽  
Keyword(s):  
Phase Difference ◽  
Piezoelectric Actuators ◽  
Ultrasonic Motor ◽  
Maximum Speed ◽  
Operating Voltage ◽  
Orthogonal Direction ◽  
Linear Ultrasonic Motor ◽  
Wide Range ◽  
Static Operation ◽  
Maximum Thrust

A linear ultrasonic motor (LUSM) with two parallel beams and two multilayer piezoelectric actuators (MPAs) has been developed. The MPAs are aligned across the beams, and the force and displacement generated by the MPAs result in the deformation of the beams in the orthogonal direction. The LUSM has two types of operation modes: dynamic and static. In dynamic operation, the MPAs are driven by alternating voltages with a phase difference, and elliptical displacement motions are generated on the surfaces of the beams. Objects touching the surfaces of the beams can be moved in the same direction by friction. In addition, micro positioning is available over a wide range by combining dynamic and static operations. The characteristics of the LUSM include a maximum speed of 41 mm/s and a maximum thrust of 3.4 N at an operating voltage of 20 Vp-p. A movement range of approximately 8 μm has been confirmed during static operation.

Design of V-shaped linear ultrasonic motor driven with low-voltage

2021 ◽  
Vol 29 (1) ◽  
pp. 91-99
Author(s):  
Wei-qing HUANG ◽  
◽  
Cheng-long YANG ◽  
Zhao-chen SHEN ◽  
Hao-dong XUE ◽  
...  
Keyword(s):  
Low Voltage ◽  
Ultrasonic Motor ◽  
Linear Ultrasonic Motor

A two degrees of freedom comb capacitive-type accelerometer with low cross-axis sensitivity

2019 ◽  
Vol 13 (3) ◽  
pp. 5334-5346
Author(s):  
M. N. Nguyen ◽  
L. Q. Nguyen ◽  
H. M. Chu ◽  
H. N. Vu
Keyword(s):  
Degrees Of Freedom ◽  
Proof Mass ◽  
Vibration Modes ◽  
Electrode Structure ◽  
Element Analysis ◽  
Mechanical Coupling ◽  
Fully Differential ◽  
Mode Effects ◽  
The Finite Element Analysis ◽  
Cross Axis

In this paper, we report on a SOI-based comb capacitive-type accelerometer that senses acceleration in two lateral directions. The structure of the accelerometer was designed using a proof mass connected by four folded-beam springs, which are compliant to inertial displacement causing by attached acceleration in the two lateral directions. At the same time, the folded-beam springs enabled to suppress cross-talk causing by mechanical coupling from parasitic vibration modes. The differential capacitor sense structure was employed to eliminate common mode effects. The design of gap between comb fingers was also analyzed to find an optimally sensing comb electrode structure. The design of the accelerometer was carried out using the finite element analysis. The fabrication of the device was based on SOI-micromachining. The characteristics of the accelerometer have been investigated by a fully differential capacitive bridge interface using a sub-fF switched-capacitor integrator circuit. The sensitivities of the accelerometer in the two lateral directions were determined to be 6 and 5.5 fF/g, respectively. The cross-axis sensitivities of the accelerometer were less than 5%, which shows that the accelerometer can be used for measuring precisely acceleration in the two lateral directions. The accelerometer operates linearly in the range of investigated acceleration from 0 to 4g. The proposed accelerometer is expected for low-g applications.

scholarly journals A novel linear ultrasonic motor with dual sliders

AIP Advances ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 025238
Author(s):  
Danhong Lu ◽  
Qiuxiang Lin ◽  
Yanxiang Han ◽  
Bingxun Chen ◽  
Chunrong Jiang ◽  
...  
Keyword(s):  
Ultrasonic Motor ◽  
Linear Ultrasonic Motor
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