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。
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。
Considering the nonlinear and the parameters variability, which vary widely with the working condition in the electro-hydraulic servo velocity system, fuzzy gain scheduling controller was developed.
针对电液伺服速度系统的非线性和参数时变特性，提出了模糊增益调度控制方法。
Aiming at the problems such as time-variable parameters, nonlinear dead zone of the valve existing in the electro-hydraulic position servo control system, a self-tuning fuzzy controller is designed.
针对电液位置伺服系统中存在参数的时变性、死区非线性等问题，设计了自调整模糊控制器。
That is decided mainly by the typical unknown and uncertain nonlinear system of electro-hydraulic servo system, which gains precise maths model of system difficultly.
这主要是由电液伺服系统的典型未知不确定性和非线性特性所决定的，使得系统精确的数学模型难以获得。
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。
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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