It has the higher switching speed and frequency and can be used as the pilot valve for a larger flow rate valve, or as a direct control valve for small flow rate hydraulic loop.

该阀具有很高的切换速度和频率，可以用来作为大流量高速开关阀的先导控制阀，也可以在小流量回路中直接作为控制阀使用。

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Direct control of hydraulic servo valve by means of PLC can simplify the control of hydraulic system and reduce cost.

采用可编程控制器(PLC)直接控制液压伺服阀，可以简化控制系统，降低成本。

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The method of direct control of hydraulic servo valve by means of PLC, the component parts of the control system and the driving interface circuits were described mainly in this paper.

文章主要介绍PLC对液压伺服阀的控制方法及控制系统的组成，说明驱动接口电路的连接。

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