研制了一种新型直线超声波电动机，电机采用面内振动的形式。
The motor based on the vibration in plane of the rectangular plate.
提出了一种基于薄板面内振动的纵弯模式驻波直线超声波电动机。
A linear ultrasonic motor was put forward. Elliptical motions of the surface points of the stator are generated by the superposition of longitudinal and bending modes of the oscillating structures.
结论提速列车车厢内振动、噪声对乘务员自觉症状、内分泌系统、消化系统及视野等方面有一定影响。
Conclusions the vibration and noise in the accelerated train have some effects on the subjective symptoms, endocrine system, digestive system and field of vision of the train attendants.
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