Hundreds of piezoelectric ultrasonic motors (PUSMs) have been proposed for scientific
researches and developed for commercial applications in the past decade. They are …

To accomplish high carrying/positioning capability with compact structure, in this study, a
miniature self-moving ultrasonic actuator (MSMUA) is developed by exciting a flexural …

Piezoelectric Ultrasonic motors (USM) are based on the principle of converse piezoelectric
effect ie, vibrations occur when an electrical field is applied to piezoelectric materials. USMs …

Rotary ultrasonic machining (RUM) is a superior processing method for difficult-to-cut
materials. It employs a large enough ultrasonic amplitude of the tool to enable its unique …

Flexible rotors are widely used in traveling wave rotary ultrasonic motors (TRUMs) because
of their higher energy conversion efficiency; however, there have been few reports on how …

The electrical packaging for high power devices such as IGBT or MOSFET is achieved by
heavy aluminum ultrasonic wire bonding. In this process, the amplitude stability of ultrasonic …

For ultrasonic systems, the resonance frequency tracking (RFT) is the most critical step. The
rapid development in advanced material processing and microelectronics package has …

The model of ultrasonic motor (USM) is the foundation of the analysis and control of the
motor. Ultrasonic motor maintains nonlinear and complicated in dynamics due to its special …

Despite their great features, ultrasonic motors'(USM) driving schemes still suffer from
suboptimum driving efficiencies and limited operating range. The driving efficiency and …

Aiming at the problem that the differential term of Newton iterative learning law is not easy to
be determined and affects the control performance, the secant iterative learning law is …