Levitation Effect Study based on a Disc-type Piezoelectric Ultrasonic Stator

The objective of the paper is to gain a deeper understanding of the levitating behavior of the disc type ultrasonic stator for possible application on moving object. For the purpose, some axial vibration measurements were made to investigate levitation motion on the stator surface and explore its possible application on the linear, surfing and shaft types of bearing less ultrasonic motor. Dynamic response also was investigated and compared with some analytical results. The result showed that the levitation capacity decreased with driving frequency increase.