Stepper motor is a motor controlled by digital signal, which converts pulse signal into Angle displacement. The wheeling speed is controlled by the frequency of pulse signal.

步进电机是一种数字控制电机，它将脉冲信号转变成角位移，电机的转速由脉冲信号频率决定。

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This paper presents a minimum weight design method of structures with multi frequency, displacement and stress constraints.

本文给出了具有多个频率、位移和应力约束的结构最轻重量设计。

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The tests of frequency sweeping and dynamic displacement sweeping at different temperatures for the viscoelastic material silicon rubber were conducted.

对硅橡胶粘弹性阻尼材料进行不同温度的频率扫描和动态位移扫描实验。

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