Robust resonant frequency tracking control for ultrasonic-motor drive

1997 ◽  
Vol 80 (3) ◽  
pp. 1-11 ◽  
Author(s):  
Kazuo Kato ◽  
Takashi Sase
Keyword(s):  
Resonant Frequency ◽  
Tracking Control ◽  
Ultrasonic Motor ◽  
Motor Drive ◽  
Frequency Tracking

The Key Techniques of Novel Miniaturized Ultrasonic Motor and its Application in Micro-EDM

2008 ◽  
Vol 375-376 ◽  
pp. 77-81
Author(s):  
Yong Jun Tang ◽  
Zhen Long Wang ◽  
Zhong Ning Guo ◽  
Yong Jun Zhang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Resonant Frequency ◽  
Ultrasonic Motor ◽  
Micro Edm ◽  
Frequency Tracking ◽  
Electro Discharge Machining ◽  
Compact Size ◽  
Narrow Space ◽  
Key Techniques

In order to operate in narrow space, a novel miniaturized EDM (Electro Discharge Machining) mechanism has been developed. A prototype of miniaturized EDM device based on ultrasonic motor (UM) has been developed, which has its advantage of compact size (70×40×50 mm). The differential driving electrode has been presented, and coaxial forced vibration of electrode is benefit for the evacuation of debris, so it helps to achieve stable and efficient machining. Driving principle of ultrasonic motor is analyzed, and simulation using Finite Element Method (FEM) is accomplished. The auto-frequency tracking has been carried out, in order that the motor work on resonant or quasi-resonant frequency. Finally, EDM experiment has been finished, and holes with figures of circleΦ85μm and Y-typed have been machined.

Resonant Frequency Tracking Control for a Linear Compressor with Assist Springs

2020 ◽  
Author(s):  
Takahiro Suzuki ◽  
Masaki Koyama ◽  
Syuhei Nagata ◽  
Wataru Hatsuse ◽  
Masatsugu Takemoto ◽  
...  
Keyword(s):  
Resonant Frequency ◽  
Tracking Control ◽  
Linear Compressor ◽  
Frequency Tracking
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