Under the assumption of constant torque damping coefficient, the step response of an ultrasonic motor is obtained from the moment equation of the rotor, and also the property is deduced.
从超声马达转子的运动方程入手，在假定转子受定常阻尼的条件下，求解出阶跃响应，并由此推导出超声马达的输出特性。
The capabilities of the torque, moment of inertia and acceleration of the servo motor is mostly checked. The rigidity and accuracy of servo feed system is verified.
并着重对电动机的转矩、转动惯量及加速能力进行了匹配校核， 对机械传动装置刚度变化及弹性系统刚度变化引起的定位误差进行了验算。
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