2[3]Chang Kuo-Tsai,M Ouyang.Rotary ultrasonic motor driven by a disk-shaped ultrasonic actuator.IEEE Transactions on Industrial Electronics,2006,53(3):831-837.
3[4]G Bal,E Bekiroglu.A highly effective load adaptive servo drive system for speed control of travelling-wave ultrasonic motor[J].IEEE Transactions on Power Electronics,2005,20(5):1 143-1 149.
4[5]K Takemura,Y Ohno,T Maeno.Design of a plate type multi-DOF ultrasonic motor and its self-oscillation driving circuit[J].IEEE/ASME Transactions on Mechatronics.2004,9(3):474-480.