For improving wear resistance of PTFE-based material and performances of ultrasonic
motors, 1-Dimple and 3-Dimple textures were fabricated on stator surface based on …

Traveling wave ultrasonic motors are actuators relying on piezoelectric ceramics that
combine many advantageous features, such as high stalling torque, fast response …

This paper presents a high-efficiency compensation method of the dead zone with the aid of
the adaptive dither for the ultrasonic motor. Prior to proposing the method, the influence of …

The friction performance of alumina sliding against copper was studied by molecular
dynamics simulation to understand the wear mechanism of ultrasonic motors (USM) from an …

In this study, we aimed to improve the backdrivability and torque control of a traveling wave
ultrasonic motor (TWUSM). Because of its operating principle, a TWUSM has strong holding …

Compactness, lightweight, and a simple structure are typical features of ultrasonic motors
(USMs), but these features are often compromised by the addition of external sensors …

When applying a load torque to an ultrasonic motor, a dead-zone occurs in the control input.
A nonlinear adaptive control, which considers dead-zones, is consequently proposed for the …

Für eine Vielzahl von Operationen im Bauchraum ist heute die Laparoskopie Stand der
Technik, so zB die Cholezytektomie zur Entfernung der Gallenblase. Hierbei handelt es sich …

摘要介绍了一种采用空间移相代替时间移相, 实现电机调速控制的新型空间调相环形行波超声波
电机. 设计了新型压电陶瓷极化分区方案, 利用四个电源在超声波电机定子上激励出四个驻波 …

Sažetak Since a conventional controller is continuous one, control period is normally set for
a long time. When applying that controller for a travelling-wave ultrasonic motor whose …