rotational frequency

Take into consideration of the timing of gear shift when the vehicle running on the road, the thesis formulates the rotational speed controlling scheme of the variable frequency motor on the testing bench.

结合车辆在路面行驶时的换档时机，制定了测试台架上变频电机转速的控制方案。

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usually it is suggested that all pulsar's rotational braking only comes from the radiation wd of normal magnetic dipole moment in rotational frequency ( we refer it to the pog hypothesis).

通常假定垂直磁偶极矩在其旋转频率上的辐射W d是所有脉冲星制动的唯一来源（我们称之为POG假定）。

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not only can the fundamental wave due to the eccentricity of the master ball be eliminated, the error component corresponding to the rotational frequency can also be identified and detected with this method.

采用这种方法不仅可以消除测量球的偏心产生的基波，而且能够识别并保留轴线误差运动中与转速同频率的成分，从而测得完整的轴线旋转误差。

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Introduced in the design how to uses the thermocouple sensor to carry on the survey for the temperature, and how to uses the frequency changer to control the electrical machinery rotational speed.

在设计中介绍了如何使用热电偶传感器对温度进行测量，如何使用变频器控制电机转速。

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Methods The number of rosette scan petals required for the instantaneous FOV to cover the total FOV was calculated and the effects of the gyro rotational frequency, motor rotational frequency and missile spin rate variations on rosette scan patterns and frame frequencies were predicted.

方法通过研究陀螺、空心电机转动频率变化及弹体自旋条件下瞬时视场覆盖全视场所需的玫瑰花瓣数，得出上述三者对玫瑰扫描空间图案和不漏扫帧频的影响；

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When the rotational frequency equals the sum ( or the difference) of the natural frequencies of the flexural and torsional vibrations, coupled flexural torsional resonance may occur.

当转动频率接近于扭转振动固有频率与弯曲振动固有频率之和或之差时，可能会发生弯扭耦合共振。

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The stator with three-phase or polyphase winding generates variable frequency energy, voltage following rotational speed, while the rotor has structure of permanent magnetism or electrical excitation.

发电机的定子为三相或多相绕组，转子采用永磁体或电励磁结构；定子发出非工频的电能，电压也随转速变化；

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Then through the modal analysis get output axis of frequency and vibration model, analyzes whether it is to produce resonance, ask out of output axis limit rotational speed and working speed compare.

然后通过模态分析得到输出轴的频率和振型，分析其是否产生共振变形，求出输出轴的极限转速和工作转速做比较。

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