scholarly journals A Longitudinal-Bending Hybrid Linear Ultrasonic Motor and Its Driving Characteristic

2022 ◽  
Vol 2022 ◽  
pp. 1-14
Author(s):  
Huajie Qu ◽  
Chendong Liu ◽  
Lei Zhang ◽  
Jianjun Qu ◽  
Baoyu Song
Keyword(s):  
Average Velocity ◽  
Vibration Mode ◽  
Longitudinal Vibration ◽  
Ultrasonic Motor ◽  
Low Noise ◽  
High Tech ◽  
Driving Frequency ◽  
Finite Element Software ◽  
Linear Ultrasonic Motor ◽  
Stall Force

As a new type of driver, linear ultrasonic motor (LUSM) is widely used in the high-tech field because of its low speed, high thrust, low noise, and no electromagnetic interference. However, as an actuator used in microdevices, most of the existing LUSMs are large in size and not compact in structure. In order to overcome these limitations, a new structure of linear ultrasonic motor’s stator is developed in this paper. The stator is similar to a tuning fork structure, which is divided into three parts: two driving feet, two driving legs, and the driving body. By using the first-order longitudinal vibration mode of the whole stator and the unique partial second-order bending vibration mode of the driving legs to achieve vibration mode degeneracy, a mode hybrid linear ultrasonic motor that is easy to miniaturize is proposed. Its working principle is analyzed. The dynamic analysis of the stator is carried out by using finite element software. The structure dimension of the stator and the driving frequency under the working mode are determined. At the same time, the feasibility of driving feet synthesizing elliptical motion is verified theoretically and experimentally. In addition, the LUSM test setup is built. The effects of driving frequency and Vpp on stator stall force and average velocity are studied. The results show that the maximum stall force can reach 99 mN, and the average velocity of the motor is 88.67 mm/s with Vpp = 320 V and driving frequency 80.2 kHz. The proposed LUSM is appropriate for use in occasions with quick return characteristics, like the controlling valve or nozzle of the printer. The research results provide guidance for the stator design of the linear ultrasonic motor.

A New Type Multi-Mode Linear Ultrasonic Motor

2011 ◽  
Vol 189-193 ◽  
pp. 2961-2964 ◽  
Author(s):  
Tie Min Zhang ◽  
Luo Ping ◽  
Liang Li
Keyword(s):  
Longitudinal Mode ◽  
Tangential Direction ◽  
Ultrasonic Motor ◽  
Finite Element Software ◽  
Linear Ultrasonic Motor ◽  
Bending Mode ◽  
Exciting Frequency ◽  
New Type ◽  
Piezoelectric Coupling ◽  
Multi Mode

A prototype for multi-mode linear ultrasonic motor has been proposed and designed. It is designed using a combination of the first longitudinal and the first bending mode. The piezoelectric ceramics convert energy using the longitudinal d33 effect which allows an improved reliability, large vibration amplitudes and excellent piezoelectric coupling. The normal direction motion of the driving element is excited by the first longitudinal mode. The tangential direction motion of the driving element is excited by the first bending mode. The resulting displacement of the driving element is transmitted by the frictional force between the vibrator and the rail in a linear motion. The analysis on the modals of the composite vibrator by using the ANSYS finite element software has been presented in this paper. Finally, the vibrator structure of the motor and the motor's own structures are designed. The basic design is discussed and simulations are compared with the experimental results, the results show that the motor characteristics can be optimized for a particular task by choosing the appropriate operating parameters such as exciting voltage, exciting frequency and normal force.

Actuating Mechanism and Design of a Double Driving Feet Linear Ultrasonic Motor Using Longitudinal Vibration Transducer

2010 ◽  
Vol 434-435 ◽  
pp. 775-778
Author(s):  
Wei Shan Chen ◽  
Ying Xiang Liu ◽  
Jun Kao Liu ◽  
Sheng Jun Shi
Keyword(s):  
Transient Analysis ◽  
Longitudinal Vibration ◽  
Structural Parameters ◽  
Ultrasonic Motor ◽  
Longitudinal Vibrations ◽  
Resonant Frequencies ◽  
Vibration Transducer ◽  
Linear Ultrasonic Motor ◽  
Piezoelectric Coupling ◽  
Vertical Vibrations

A double driving feet linear ultrasonic motor using longitudinal vibration transducer is proposed in this paper. The stator of proposed motor contains a horizontal transducer and two vertical transducers. The horizontal transducer includes two exponential shape horns located at the leading ends, and each vertical transducer contains one exponential shape horn. The horns intersected at the tip ends where located the driving feet. The horizontal and vertical vibrations of driving feet are generated by the longitudinal vibrations of horizontal and vertical transducers, respectively. Longitudinal vibrations are superimposed in the stator and generated elliptical motions at the driving feet. The two vibration modals of stator are gained with FEM, and the resonant frequencies of two vibration modals are degenerated by adjusting the structural parameters. Transient analysis of piezoelectric coupling states the good and strong elliptical motions of driving feet, and verifies the theoretical feasibility of proposed motor.

A type of dual-rotor hybrid ultrasonic motor based on vibration of four side panels

2016 ◽  
Vol 28 (14) ◽  
pp. 1916-1924 ◽  
Author(s):  
Lin Yang ◽  
Xingxing Zhu ◽  
Sisi Di
Keyword(s):  
Torsional Vibration ◽  
Vibration Mode ◽  
Longitudinal Vibration ◽  
Piezoelectric Ceramics ◽  
Ultrasonic Motor ◽  
Outer Diameter ◽  
Operating Voltage ◽  
Vibration Modes ◽  
Bending Vibration ◽  
Longitudinal Vibration Mode

Based on vibration of four side panels, a type of dual-rotor hybrid ultrasonic motor without using the torsional piezoelectric ceramics polarized along the circumferential direction is presented. The first longitudinal and the first bending vibration modes of the four side panels are used to indirectly excite the first longitudinal and the second torsional vibration modes of the stator cylinder. There are rectangle piezoelectric ceramics bonded on both sides of the four side panels, which are uniformly distributed along the circumference of the stator cylinder. One pair of panels on the opposite side is used to indirectly excite the first longitudinal vibration mode of the stator cylinder, and the other pair is used to indirectly excite the second torsional vibration mode. The simulation results, using finite element method software Workbench, reveal the operating principles, and the optimal structure is proposed. The appearance size of the prototype is 27.2 mm × 27.2 mm × 70 mm, while the outer diameter of the stator cylinder is 20 mm. The working frequency of the prototype measured in experiment is 44.7 KHz, which is consistent with the numerical results. According to the major mechanical measurement at 450 Vp−p operating voltage and 3.46 N preload, the stalling torque of the prototype is 8 mN·m and the no-load speed is 140 r/min. The experimental results indicate that the motor can operate in the first longitudinal and the second torsional coupled vibration modes transformed from the first longitudinal and the first bending vibration modes of four side panels.

scholarly journals A Novel Rotary Ultrasonic Motor Using the Longitudinal Vibration Mode

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 135650-135655
Author(s):  
Dongmei Xu ◽  
Xuhui Zhang ◽  
Liangliang Zhao ◽  
Simiao Yu
Keyword(s):  
Vibration Mode ◽  
Longitudinal Vibration ◽  
Ultrasonic Motor ◽  
Longitudinal Vibration Mode

Rotary Ultrasonic Motor Using Longitudinal and Bending Modes and its Analysis

2011 ◽  
Vol 474-476 ◽  
pp. 1696-1700
Author(s):  
Jun Kao Liu ◽  
Ying Xiang Liu ◽  
Wei Shan Chen ◽  
Sheng Jun Shi
Keyword(s):  
Vibration Mode ◽  
Longitudinal Vibration ◽  
Ultrasonic Motor ◽  
Vibration Modes ◽  
Bending Vibration ◽  
Resonant Frequencies ◽  
Working Principle ◽  
Longitudinal Vibration Mode ◽  
Bending Modes ◽  
Double Head

A rotary ultrasonic motor using longitudinal and bending vibration modes is proposed in this study. The proposed motor contains two exponential shape horns located on two ends, and the end tips of the horns are used as the driving feet. Two groups of PZT elements (Longitudinal PZT and Bending PZT) are clamped in the middle of the motor by a double head flange bolt to excite the longitudinal vibration mode and bending vibration mode of the motor, respectively. By the composing of the longitudinal and bending vibration modes, elliptical trajectory vibrations can be generated on the end tips of the horns, which have the same rotation directions and can driving the rotor together by frictional force. After the introducing of the working principle, modal analysis is developed to tune the resonant frequencies of the longitudinal and bending vibration modes to be close with each other. At last, transient analysis is developed to gain the vibration characteristics of the motor, and the gained elliptical trajectory motions of particles on the driving parts verify the feasibility of the proposed design.

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.

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