Rotational feedthrough using ultrasonic motor for high vacuum condition
نویسندگان
چکیده
منابع مشابه
Rotational feedthrough using ultrasonic motor for high vacuum condition
A vacuum environment is indispensable for various measurement devices. To make the use of these devices easy, the mechatronics systems for vacuum conditions, for example, a sample stage, should be advanced. In this paper, we propose a rotational feedthrough using an ultrasonic motor. An ultrasonic motor has many advantages, and is suitable for achieving vacuum conditions. However, the piezoelec...
متن کاملMethod for Controlling Multi-DOF Ultrasonic Motor Using Neural Network
A multi-DOF ultrasonic motor developed by the authors can generate multi-DOF rotation of a spherical rotor using three orthogonal natural vibrations of a bar-shaped stator. The ultrasonic motor is suitable for making small, lightweight and simple multi-DOF motion unit. In the present paper, a control methodology for the multi-DOF ultrasonic motor is proposed and a motion control test using the ...
متن کاملInduction Motor Condition Monitoring Using Fuzzy Logic
Induction machines play a vital role in industry and there is a strong demand for their reliable and safe operation. They are generally reliable but eventually do wear out. Faults and failures of induction machines can lead to excessive downtimes and generate large losses in terms of maintenance and lost revenues, and this motivates the examination of on-line condition monitoring. The major dif...
متن کاملCompositeness Condition and Vacuum Stability
We consider what occurs when we remove one of the compositeness conditions proposed by Bardeen, Hill and Lindner that leads to predictions for the top quark mass conflicting with the experimental value. Through this consideration the condition for the Higgs particle to be the composite particle is reconsidered. We show that in this case, (I) the Higgs-Yukawa system of the standard model becomes...
متن کاملA Linear Ultrasonic Motor for Nano-technology
In response to rising demand for high performance actuators to serve nano-technology, a linear ultrasonic motor was designed and constructed to verify its potential as a viable nano-actuator. After establishing the analytical model that elucidates the physics of the ultrasonic motor operation, experimental performance tests were conducted in a fully digital controlled real-time control environm...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Vacuum
سال: 2002
ISSN: 0042-207X
DOI: 10.1016/s0042-207x(01)00411-0