永磁电动机本质上是一种含脉动激励的对称机构，将不可避免地产生振动和噪声，影响了电动机的性能。
Permanent magnet motor is essentially symmetrical structure with pulse excitation, so it inevitably has vibration and noise, which affects performance of the motor.
泵输出的周期性脉动流体的压力脉动，是引起流体谐振、激励管路振动和噪声的主要原因。
The pressure pulsation induced by the pumped periodic pulsation fluid is the main factor of causing fluid resonance and stimulating pipelines vibrations and noise.
使用快关调节阀控制能激励周期蒸汽压力脉动。
Periodic pressure undulation may be incited by fast valving control.
热声现象是放热过程和声学脉动之间的一种正向的相互激励。
The thermoacoustic phenomenon is a positive excitement betWeen lieat release and acoustic oscillation.
热声现象是放热过程和声学脉动之间的一种正向的相互激励。
The thermoacoustic phenomenon is a positive excitement betWeen lieat release and acoustic oscillation.
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