ultrasonic motor (usm) meaning in Chinese

超声波马达

Being a sort of new principle micromotor in the fronitier of science , the ultrasonic motor ( usm ) is developed at recently twenty years . utilizing the stator surface particle elliptical motion excited by piezoceeramics , the usm is drived by friction force between the stator and rotor
本文以这一新型电动机为研究对象，对其运行特性和控制策略进行研究，是有较重要的理论和实际意义的。