直驱式单出杆对称液压促动器电液伺服系统研究

Electro-hydraulic Servo System for Direct Driven Single Rod Symmetrical Hydraulic Actuator

设计一种新型液压促动器,采用直驱式容积控制技术与单出杆对称液压缸相结合,具有控制灵活、出力大、无溢流节流损失、发热量低、效率高、正反向运动特性相同等优点。对系统中各元件进行深入剖析,建立系统非线性模型,进行AMESim/Simulink联合仿真,并与传统的线性传递函数模型仿真结果进行对比分析,探究系统死区非线性的成因,同时搭建实验平台进行研究,验证了仿真结果的正确性。

The electro-hydraulic servo system for direct driven single rod symmetrical hydraulic actuator is introduced. The system has the charactristics of flexible control, output powerful, less reilef loss, low heat, energy sav- ing and high integration. We build the non-linear mathematical modeling of the system, and carry out a joint simulation of AMESim/Simulink, then the simulation results are compared with the traditional linear transfer function model, and we explore the cause of nonlinear dead zone of system. We set up an experimental platform and prove the accuracy of simulated results.