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将故障仿真的概念与方法引入到电液控制系统的故障研究中来，对电液伺服阀中的电磁力矩马达的驱动线圈进行了故障仿真，给出了其故障特征及其区别方法，为电液伺服阀故障研究提供了故障特征方面的依据．
The concept and method of fault simulation are introduced into the fault research of electro-hydraulic control system, the fault simulation of the driving coil of electro-hydraulic servo motor in the electromagnetic torque motor is carried out, and the fault characteristics and the distinguishing method are given. Hydraulic servo valve fault study provides the basis for fault characteristics.