As a new type of driver, linear ultrasonic motor (LUSM) is widely used in the high-tech field because its low speed, high thrust, noise, and no electromagnetic interference. However, as an actuator microdevices, most existing LUSMs are large size not compact structure. In order to overcome these limitations, structure motor’s stator developed this paper. The similar tuning fork structure, which...

The design of a rotary ultrasonic motor for space applications is considered. First the working principle of such device is examined. The dynamics of the stator and the rotor is then studied by means of modelling approaches proposed in tW recent literature. A special attention is devoted to geometry of the piezoelectric actuating layers and the relevant electrodes pattern. A preliminary design ...

A sonar array and a camera are the sensors of a robot that learns to move inside a building. Learning is based on the association of ultrasonic and visual images with motor commands. The two sensors extract diierent information from the environment. Sonars produce a short-range depth image on the sonar array plane, vision gives a wide-range at image of the space. In this work, a memory-based pr...