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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A kind of hydraulic servo loading system controlled by microcomputer is developed to overcome the shortcomings of the loading methods now used in the performance test of pumping units.

针对目前抽油机性能测试中加载方法的某些不足，设计并研制出一种应用微机控制的液压伺服加载系统。

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The electro hydraulic servo loading system of pumping unit is a kind of position disturbance servo loading system, and there are nonlinear uncertain factors and position disturbance in it.

抽油机电液伺服加载系统是一种位置扰动型的施力系统，存在着非线性、不确定因素及由于位置扰动引起的多余力，传统的控制方法不能达到理想的效果。

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