A Two-Feet Linear Ultrasonic Motor for Fuze Safety System

2013 ◽  
Author(s):  
Y. J. Tang ◽  
J. Wang
Keyword(s):  
Mechanical Performance ◽  
Longitudinal Vibration ◽  
Ultrasonic Motor ◽  
Two Phase ◽  
Bending Vibration ◽  
Convex Part ◽  
Linear Ultrasonic Motor ◽  
Oscillation Modes ◽  
Frequency Sweep Test ◽  
The Brain

In modern weapons systems, fuze is known as the “brain” of the ammunition, whose performance will directly affect the combat effectiveness. It guarantees the safety of ammunition during the logistical processing and makes the ammunition reliably function after launch. In the fuze system, the delay arming device is closely related to the fuze performance and safety reliability, which affects the muzzle safety distance. After years of development, the performance of delay arming device has been developed and improved, but malignant accidents such as explode in the chamber, early burst and dud have occurred from time to time. This paper investigated a standing wave linear ultrasonic motor applied to the fuze delay arming device as the arming actuator. The motor is made up of a cuboid with two drive feet and a slider with a convex part, both having a through hole. The first order longitudinal vibration and second order bending vibration of the stator were selected as working modes. The prototype was fabricated and the vibration mode test was carried out, indicating the motor can generate two-phase required oscillation modes. The frequency sweep test was also performed and two-phase frequency is proved quite close. The experiments on the motor mechanical performance were done, and the speed of the motor is 88.2 mm/s, furthermore the reciprocating motion of the slider is flexible.

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.

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 High-Power Linear Ultrasonic Motor Using Bending Vibration Transducer

2013 ◽  
Vol 60 (11) ◽  
pp. 5160-5166 ◽  
Author(s):  
Yingxiang Liu ◽  
Weishan Chen ◽  
Junkao Liu ◽  
Xiaohui Yang
Keyword(s):  
High Power ◽  
Ultrasonic Motor ◽  
Bending Vibration ◽  
Vibration Transducer ◽  
Linear Ultrasonic Motor

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.

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.

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.

A Linear Ultrasonic Motor Using Bending Vibration Transducer with Double Driving Feet

2010 ◽  
Vol 400 (1) ◽  
pp. 221-230 ◽  
Author(s):  
Weishan Chen ◽  
Yingxiang Liu ◽  
Junkao Liu ◽  
Shengjun Shi
Keyword(s):  
Ultrasonic Motor ◽  
Bending Vibration ◽  
Vibration Transducer ◽  
Linear Ultrasonic Motor

A Single Piezoelectric Trimorph Driven Bi-Directional Linear Ultrasonic Motor

2007 ◽  
Author(s):  
Tung-Li Wu ◽  
Chen-Hui Yang ◽  
Shuo-Hung Chang
Keyword(s):  
Resonant Frequency ◽  
Cellular Phone ◽  
Static Friction ◽  
Ultrasonic Motor ◽  
Published Data ◽  
Bending Vibration ◽  
Linear Ultrasonic Motor ◽  
Modes Of Vibration ◽  
Motor Operation ◽  
The Right

The design of using a single piezoelectric (PZT) trimorph actuator ultrasonically to drive a slider for two directional motions is reported. The working principle is the use of the resonant vibration induced force provided by the PZT trimorph driven at the specific frequency. In contact with a slider, the trimorph’s force overcomes the static friction of the slider and pushes the slider moving in one direction. The backward motion of the slider is achieved similarly by the different vibration mode of the PZT trimorph operated at the different resonant frequency. The merit of this work is the design of the rectangular PZT trimorph and its modes of vibration. The 3 mm by 9 mm rectangular trimorph was made of a 50 microns thick copper layer laminated with a 175 microns thick PZT layer on each face. As for ultrasonic motor operation, only one long edge of the trimorph was clamped. When the PZT layers were driven electrically at its resonant frequency and at the right phase, the PZT’s in-plane extensional vibration will turn into bending vibration. With extensive modal analysis in the Finite Element modeling, the 3:1 ratio of the length to width of the trimorph was found for the best performances. Both resonant frequencies and associated vibration modes were all identified. The performance of the prototype was experimentally evaluated by using laser interferometer and spectrum analyzer. Under 10 Vpp and 0.5 N preload, the measurement results show that the motor achieved the velocity of 200 mm/s and generated force of 0.1 N. If we divided the generated force and the slider velocity by the motor volume, the ultrasonic motor achieved the specific force of 3,282,447 3N/m3 and the specific velocity of 4,106,280 1/m2s, respectively. Comparing with the published data, the specific velocity in this study is 100 times larger. The results in this work are suitable for applications in auto-focusing and zooming lens in cellular phone camera.

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