The actualization method of the direct drive electro-hydraulic servo system was introduced, and the mathematic model of the system was built.

介绍了直驱式电液伺服系统的实现方案，并建立了系统的数学模型。

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It is demonstrated that direct drive electro-hydraulic servo system can replace the traditional electro-hydraulic servo system in the low frequency response.

结果表明，在频响不高的场合直驱式电液伺服装置完全可替代传统的电液伺服装置。

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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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