1. Characteristics of the first longitudinal-fourthbending mode linear ultrasonic motors;Park;Jpn. J. Appl. Phys.,2002
2. R. Lee, Lobster-auto focusing & zoom. in: Proceeding of 47th ICAT/JTTAS Joint International Smart Actuator Symposium, 2006, pp. 3–4.
3. A study on rectangular-bar-shaped multilayer transformer using length extensional vibration mode;Hu;Jpn. J. Appl. Phys.,1999
4. Novel method for driving the ultrasonic motor;Kim;IEEE,2002
5. A cylindrical micro ultrasonic motor using a micro-machined bulk piezoelectric transducer;Kanda;IEEE Ultrason. Symp.,2004