对行波超声电机的控制模型进行了研究，并建立了等效动态振动模型。
The mathematics model of travelling-wave ultrasonic motors is studied in this paper and the equivalent vibrating model is built.
本文以石油钻柱为研究对象，针对常见的中井钻柱的力学特性及动态振动进行深入研究。
This paper takes oil drilling for the research objective, researching for mechanical parameter and vibration parameter of oil drilling.
在单一曝光中，相机的意外抖动被称为相机振动，它会带来动态方向上的模糊。
Accidental movement of the camera during an exposure is called camera shake and has the effect of smearing the image in the direction of movement.
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