This paper introduces the technology of ultrasonic motor (USM) and its potential in the future.

对超声波马达技术及其应用现状和发展前景做了介绍。

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Ultrasonic Motor (USM) has excellent performance and many useful features, however, its mathematical model has strong non-linearity and time-variety to make precise position servo very difficult.

超声波电机是一种新型的电机，它有许多电磁电机无法比拟的优点，但它的数学模型的强非线性和时变性，使高精度的位置定位非常困难。

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