1. Chen, Z., Zhao, C.: An effective frequency tracking control and balancing compensation between CW and CCW rotation speed techniques for ultrasonic motor. In: Proceeding of the IEEE Ultrasonics Symposium, vol. 3, pp. 2251–2254 (2004)
2. Shi, W., Wang, Y., Zhao, H., Huo, X., Chen, W.: LPV modelling and identification of nonlinear temperature dependence for ultrasonic motor. In: Proceeding of the Chinese Control And Decision Conference (CCDC), Shenyang, pp. 203–208 (2018)
3. Niu, Z., Cui, Y.: Simulation model for ultrasonic motors powered by resonant converters. In: Proceeding of the International Conference on Mechatronics and Machine Vision in Practice, pp. 1–5 (2007)
4. Jeong, S., Chong, H., Park, M.: Driving characteristics of the thin type ultrasonic motor using microcontroller. Piezoelectrics Appl. 49(2), 152–160 (2010)
5. Harmouch, K., Daniel, L., Bernard, Y. Aubry, J.M., Marchal, P.: Dynamic contact modelling for resonant piezoelectric motors. In: Proceeding of the International Conference on New Actuators, Bremen, Germany, pp. 1–4 (2018)