This dissertation introduces the background and significance of the research and the present situation and developing prospect of the EMA Servo amplifier.

论文介绍了选题背景和意义以及电动舵机伺服放大器的现状和发展前景。

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The experiment results show that phase phenomena are probably caused while the servo amplifier gain and the amplitude of input signal increase to some extent.

实验结果表明，当伺服放大器增益和输入信号的幅值较大时都有可能促成系统的相位突变。

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Some faults such as amplifier offset, parameter changes, servo valve backlash and sensor fault are seeded in a virtual way by means of different switches in Simulink.

通过不同开关的动作来虚拟模拟常见的故障，诸如，放大器漂移、系统参数改变、伺服阀反冲以及传感器失灵等。

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