Affiliation:
1. Korea Institute of Industrial Technology
2. Gwangju Institute of Science and Technology (GIST)
3. Gwangju Institute of Science and Technology
Abstract
New holding mechanism is proposed to improve the positioning capability of ultrasonic linear
motor based on previous researches proposed by the authors. Through the previous holding mechanism
using a resonance system, the remarkable operating stability and controllability at high-power driving
were achieved. However, when higher power is demanded, big noise in supporting parts of a resonance
system is generated and these parts could be damaged and worn due to the discordance of a resonance
frequency between a transducer and supporting horns. Also the coupling problem of two vibration modes
remains because of using a half wavelength. This research proposes a new design of ultrasonic motor with
three supporting points in one vibrator for high stiffness support and discusses the solution about the
coupling effect and the nano-level positioning capability. Finally, a maximum driving mechanical force
and the positioning accuracy were achieved over 75 N and 100 nm through this mechanism. Moreover,
the efficiency of motor was 35% when the trust force was 52 N and the velocity was 0.27 m/s.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science