Due to the inherent nonlinearities and instability of the electromagnetic suspension system, suspension control is key point. So it is needed active control in order to keep steady suspension.

对于电磁吸浮型磁浮列车，悬浮控制是其关键部分，由于该系统的非线性和不稳定性，需要通过主动控制使其稳定悬浮。

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Therefore, the suspension characteristics of the electromagnetic bearing would be directly affected by the accuracy and response speed of the current in electromagnetic coils.

因此，电磁线圈电流的控制精度和速度将直接影响电磁轴承的悬浮特性。

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Based on electromagnetic theory, electromagnet is used for actuator of active suspension and a general electromagnetic actuator is constructed.

根据电磁学原理，利用电磁铁作为主动悬架的作动器，构造出电磁作动器的一般结构。

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