Modal Analysis on Linear Ultrasonic Motor

2015 ◽  
Vol 742 ◽  
pp. 522-524
Author(s):  
Lei Luo ◽  
Qian Luo
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Vibration Mode ◽  
Ultrasonic Motor ◽  
Industrial Robots ◽  
The Finite Element Method ◽  
Actual Structure ◽  
Linear Ultrasonic Motor ◽  
Inherent Frequency ◽  
High Thrust

As the expanding applications of linear ultrasonic motor, the demand for high-thrust linear ultrasonic motor in the aerospace and industrial robots is growing. Consequently, for a high-thrust linear motor, it’s stator model was established according to the actual structure of the motor stator and was also analyzed of the motor stator modal by the finite element method. The results show that the inherent frequency of vibration for the motor stator increases with the order, and corresponds with the vibration mode, by which was realized to work for the linear ultrasonic motor.

Design of a Linear Ultrasonic Motor With the Bi-Directional Movement

2005 ◽  
Author(s):  
Yuan Mao Huang ◽  
Shih-Shun Huang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Input Signal ◽  
Ultrasonic Motor ◽  
Mode Shapes ◽  
The Finite Element Method ◽  
Resonant Frequencies ◽  
Linear Ultrasonic Motor ◽  
Directional Movement ◽  
Vibratory Analysis

This study presents a design of the linear ultrasonic motor. The major components consist of a slider and a vibrator with a piezoceramic piece. The input signal on the piezoceramic piece causes vibration of the vibrator. The development of the vibrator is based on vibratory analysis of a beam with both ends clamped. The resonant frequencies and the vibratory mode shapes of the vibrator are calculated and compared with those obtained by using the finite element method. By only changing two frequencies of the input signal on the piezoceramic piece, the vibrator is excited and the slider can achieve forward and backward bi-directional movement due to friction between the vibrator and the slider. The calculated results are compared with results obtained by Grant and using software ANSYS.

Finite Element Analysis for the Welding Column of CNC Boring Machine

2014 ◽  
Vol 852 ◽  
pp. 447-451
Author(s):  
Yan Fang Yue ◽  
Zhi Bo Xin ◽  
Jin Ye Wang
Keyword(s):  
Finite Element Method ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Dynamic Analysis ◽  
The Finite Element Method ◽  
Element Analysis ◽  
Construction Design ◽  
Inherent Frequency ◽  
Working Frequency ◽  
Loaded Column

The finite element method was applied in the construction design of the welding column of CNC boring machine for dynamic analysis and modal analysis. The laws of deformation and stress of a loaded column were obtained, and the natural frequency of each step and modes of column were also given according to this method. The results implied that the strength and the stiffness of welding column were met the machining requirements. Machine working frequency far less than inherent frequency, thus resonance is not easy to occur. Through the way, the optimization proposals of structure were given.

Fundamental Study on Contact Behavior of Ultrasonic Motor

2005 ◽  
Author(s):  
Daichi Nakajima ◽  
Tomoyuki Ozawa ◽  
Takeshi Maeda ◽  
Michio Tsukui ◽  
Kohro Takatsuka ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Energy Efficiency ◽  
Finite Element ◽  
Frictional Force ◽  
Numerical Technique ◽  
Ultrasonic Motor ◽  
The Finite Element Method ◽  
Fundamental Study ◽  
Contact Behavior ◽  
Lining Material

We discuss the contact behavior between the stator and the lining material that sticks to the rotor of an ultrasonic motor. The ultrasonic motor is powered by the vibration of the stator and operates with a frictional force between the stator and the lining material. Therefore, it is important to examine the mechanism of the contact behavior to improve the energy efficiency and durability of the ultrasonic motor. We propose a numerical technique using the finite element method to examine the contact behavior between the stator and the lining material. Then, we compare the numerical example with the theoretical solution proposed by L. A. Galin and confirm the validity of our technique. Moreover, on the basis of incremental theory, we use our technique to numerically examine the complex contact behavior of the non-contact zone, slip zone and stick zone in a non-rotating rotor.

Analysis of the Ship Loader's Vibration Mode in the Roll-On Process and the Reinforcement Scheme

2013 ◽  
Vol 721 ◽  
pp. 536-540
Author(s):  
Wen Biao Zhang ◽  
Shu Min Wan ◽  
Bin Lin ◽  
Meng Lai Zhu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Vibration Frequency ◽  
Vibration Mode ◽  
Parametric Modeling ◽  
The Finite Element Method ◽  
Reinforcement Scheme ◽  
Vibration Performance ◽  
Element Method

The roll-on process of the ship loader is studied with the finite element method in this paper. The principle and the scheme of the parametric modeling for the ship loader have been discussed. The vibration frequency and the vibration mode of the ship loader in the roll-on process have been researched, and the weaknesses in the structure of the ship loader have been founded. Based on the above discussion, the reinforcement scheme of the ship loader has been put forward, and the vibration mode and frequency of the strengthened ship loader in the roll-on process have been analyzed. With the comparison of the original one, the anti-vibration performance of the strengthened ship loader has been improved, the reinforcement scheme has been proved to be a worthy one in the roll-on process.

A Linear Stator Permanent Magnet Vernier Machine Using Variable Halbach Arrays

2013 ◽  
Vol 416-417 ◽  
pp. 305-310 ◽  
Author(s):  
Yi Du ◽  
K.T. Chau ◽  
Ming Cheng
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Permanent Magnet ◽  
Power Density ◽  
Thrust Force ◽  
Quantitative Comparison ◽  
The Finite Element Method ◽  
Higher Power ◽  
Halbach Arrays ◽  
High Thrust

This paper proposes a linear stator perment magnet (PM) vernier machine using variable Halbach Arrays (LSPMV-VHA machine) which offers a number of outstanding merits, such as the high thrust force and low cogging force. The key is to newly employ variable Halbach PM array to substitute the parallel PMs in the linear stator PM vernier (LSPMV) machine. By using the finite element method, the dimensions and the magnetization directions of the PM segments are optimized for the aim of the highest power density. In order to confirm the advantages, a quantitative comparison between the proposed machine and the LSPMV machine is performed in the conditions of the same PM volume, electric loading and rated speed. The results show that the proposed machine has higher power density and lower cogging force than its counterparts.

Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20868-20875 ◽  
Author(s):  
Junxiong Guo ◽  
Yu Liu ◽  
Yuan Lin ◽  
Yu Tian ◽  
Jinxing Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Interfacial Effect ◽  
Infrared Photodetector ◽  
The Finite Element Method ◽  
Ferroelectric Domains ◽  
Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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