泵控电液伺服系统多模态可拓控制研究

Research of multi-mode extension control for pump-control electro-hydraulic servo system

针对泵控电液伺服系统位置控制的快速性、稳定性和精确性存在矛盾的问题,本文提出了一种多模态可拓控制电液伺服系统,将可拓方法应用于系统设计中。多模态可拓控制切换器根据提取的系统特征信息,建立特征状态的关联函数,根据关联度划分测度模式将系统运动分为三段,分别由Bang-Bang控制器、模糊控制器和PID控制器进行分段控制。仿真结果显示系统具有较快的响应速度和抗参数变化的鲁棒性,并能实现高精度控制。

A multi-mode extension control electro-hydraulic servo system has been proposed in the text. The extension method has been applied in design of the system. According to the characteristic information of the system, correlation function has been established by multi-mode extension control switch. The movement process has been divided into three parts according to correlative degree, which is controlled separately by Bang -Bang controller, fuzzy controller and PID controller. Simulation results show that the system has a rapid response and strong robustness to parameters variation, which can realize the goal of high precision control.