It presents the causes of the normal-model noise and common-model noise of the switching mode power supply and methods to restrict the noises.

介绍开关电源的常态噪声和共态噪声产生的原因，以及几种抑制噪声的方法。

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The noise and vibration tests show that this transitional curve is better than normal ones, which provides the reference for studying high performance rigid rotator model vane pump.

通过噪声和振动实验验证该定子过渡曲线优于目前刚性转子式叶片泵的过渡曲线，对研制高性能刚性转子式叶片泵结构理论有参考价值。

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