A hybrid control method for passive electro-hydraulic servo loading system was proposed based on new compensation structure and nonlinear PID controller.

研究了基于新型补偿结构和非线性PID控制器的被动式电液伺服加载复合控制方法。

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Aiming at the problems as the nonlinear factors and the position disturbance in the electro-hydraulic servo loading system of pumping unit, the conventional control method cant attain perfect effect.

抽油机电液伺服加载系统存在非线性和位置扰动引起的准确度问题，传统的控制方法不能达到理想的效果。

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As a typical servo system for simulating various loads in the experiment, the electro-hydraulic loading system is quite a complex machine-electricity-hydraulic multiple system.

由于是一个典型的力伺服系统，而且在仿真实验过程中需要模拟各种载荷的变化情况，电液伺服加载系统是一个相当复杂的机—电—液复合系统。

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