本文介绍电液伺服系统的几种动态测试方法，包括随机噪声测试，锤击法测试和扫频测试。

In this paper several dynamic testing methods of electrohydraulic servo systems are introduced, including stochastic noise test, hammering test and sweep frequency test.

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采用锤击法，利用冲击激励的宽频特性，研究了金属结构红外探测器的共振特性及影响振动噪声的力学因素。

Mechanical factors effecting on the vibration noise and resonance performance of IR detector were analyzed for the method of impact excitation using a hammer.

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