无阀电液位置伺服系统的自适应模糊PID控制器设计

Design of a Self-adaptive Fuzzy PID Controller for Valveless Electro-hydraulic Position Servo System

针对具有AC伺服电机动态特性的无阀电液位置伺服系统设计了一种能够利用模糊规则动态的修正控制器参数的自适应模糊PID控制器,该控制器是基于常规PID控制器参数和动态性能指标之间的关系,建立了模糊规则表来更新控制器的参数。仿真结果表明了所设计的自适应模糊PID控制器与常规PID控制器相比,能够获得更好的动态特性和对于外部干扰更好的鲁棒性。

A self-adaptive fuzzy PID controller, which can dynamically modify the controller＇s parameters by using fuzzy rules presented in this paper, is designed fora valveless electro-hydraulic position servo system comesponding to the dynamic characteristics of AC servo motor. Based on the relationship between the parameters of conventional PID controller and the dynamic performance indexes, the fuzzy rules table is established for updating the controller＇s parameters. The simulation results show that the designed self-adaptive fuzzy PID controller, which compares with conventional PID controller, can obtain good dynamic performance and is robust to the external disturbances.