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

A linear standing-wave ultrasonic motor with a hollowed and symmetrical stator is proposed
in this study. The stator is cut from a cuboid block to produce a hollow and symmetrical …

Traditional focusing mechanisms for space cameras are driven by a stepper motor with
transmission parts, holding the disadvantages of complex structure, low space utilization …

In this work, a novel dual stator-ring rotary ultrasonic motor is proposed, designed, fabricated
and characterized for raising driving torque of the rotary ultrasonic motor operating in the …

In this paper, a novel model for evaluating the temperature of traveling-wave ultrasonic
motor (TWUSM) is developed. The proposed model, where the interaction between the …

This paper presents a practical robust controller that solves the problem of accurate motion
control of ultrasonic motors (USMs) over prolonged durations, where temperature increases …

In order to better start and control the surface-mounted permanent magnet synchronous
motor (SMPMSM), the inverter is widely used in the SMPMSM. However, a large number of …

This article presents a high-efficient thermal analysis methodology and outlines a set of
useful design guidelines for high-power linear ultrasonic motors. A thermal network …

Friction materials with favorable mechanical and tribological characteristics are critical to the
drivability and reliability of ultrasonic motors. Preliminary screening at atmospheric …

This work presents a general optimum frequency tracking scheme for an ultrasonic motor,
which no longer requires the amplitudes of the applied voltages to keep identical. The …