When used in correction mechanism of mechanical drive, hydraulic servo system manifests a long time of overshoot, large overshoot and poor correction accuracy.

当液压伺服系统用于机械传动的校正机构时，显得调整时间长，超调量大，校正精度不高。

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The feed drive system of a precision cold ring rolling mill adopts AC servo motor and mechanical transmission, rather than conventional electro-hydraulic actuator.

采用交流伺服电机和机械驱动进给系统的冷轧环机，其进给伺服控制系统的设计需要一个新的工艺动力学模型。

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The paper introduces the principle and fault of the mechanical - hydraulic servo system on locating the valve.

本文介绍了阀门定位用机液伺服系统的工作原理及常见故障。

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