高精度液压伺服系统改善低速性能的几项措施

Several Methods of Improving Performance of Hydraulic Servo System at Low Speed

首先说明摩擦力是影响液压伺服系统低速性能的主要因素。给出了摩擦力模型和电液伺服马达的静态特性。着重分析了三种改善低速性能的措施：加震颤信号、非线性超前网络、变增益结构。给出了采用这些方法的实验和仿真结果。最后指出这三种方法实际应用的可行性。

Friction is one of the primary factors which degrade the performance of a hydraulic servo system at low speed. Friction models and static characteristics of electrohydraulic servo motors are given in this paper. Three methods of improving low speed performance addition of vibration signals, nonlinear lead network and variable-gain amplifier are emphatically analyzed. Tests and simulationr results obtained with these three methods are presented and the feasibility of these methods is indicated.