Songmei Yuan

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A novel screw-thread-type ultrasonic actuator based on a Langevin piezoelectric vibrator, with an assembly comprised a threaded shaft, is presented. The bolt-clamped Langevin vibrator consists of 4 chips of PZT ceramics and generates more energy with a certain input power. The threads of the stator multiply the linear force and position resolution, and the(More)
The fluctuating Frequency Response of The Sound Pressure Lever (SPL Response) of piezoelectric panel loudspeaker (piezo-speaker) leads the bad sound playback quality compared with traditional high-fidelity moving-coil loudspeaker, which is one of important bottlenecks that restrict improvements and applications of piezo-speaker. Based on theoretical and(More)
To lower the operating voltage and improve the output performance of piezoelectric actuators, a multilayer monolithic ultrasonic linear piezoelectric actuator was analyzed with the method of finite element analysis (FEA), and a prototype was fabricated and experimentally researched in this study. Experimental results show that the actuator with a multilayer(More)
In this study, an oblate-type ultrasonic micro-motor with multilayer piezoelectric ceramic and chamfered driving tips was proposed and experimentally researched. The micro-motor works based on the standing-wave principle and has a higher rotary speed than the traditional standing-wave one in principle, reaching a rotary speed of 2100 r/min in this study at(More)
This paper presents a novel linear piezoelectric motor which is suitable for rapid ultra-precision positioning. The finite element analysis (FEA) was applied for optimal design and further analysis, then experiments were conducted to investigate its performance. By changing the input signal, the proposed motor was found capable of working in the fast(More)
Based upon the analysis of dynamic features of the motion system with the high velocity, high acceleration and high accuracy, a modeling approach of multi-mode vibration coupled motion within wide frequency range is proposed for the hi-performance motion system, which simplifies the motion system by using ldquospring plus damperrdquo for flexible connection(More)
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