移动工作台位置控制系统变论域模糊PID研究

单机多工位锻压机的移动工作台位置控制系统是多变量的非线性耦合系统,常规PID控制和模糊PID控制难以完全适应复杂系统变化,满足系统控制要求.为了解决这一问题,在模糊PID控制的基础上加入变论域模块,改变模块中的论域伸缩因子,使模糊控制的论域随系统条件变化而调整,最终整定出满足系统控制要求的PID参数.对移动工作台位置控...

Research on variable universe fuzzy PID for position control system of moving workbench

The position control system of moving workbench for single machine multi position forging press is a multivariable nonlinear coupling system.The conventional PID control and fuzzy PID control can not fully adapt to the complex system changes,and can not fully guarantee the forging efficiency and workpiece yield.To fix the above problem,on the basis of fuzzy PID control,adding variable universe module and changing universe expansion factor in the module can make the universe of fuzzy control adjust with the system changes,and finally set the PID parameters that meet the system control requirements.The mathematical model of the position control part of the moving workbench was established,and the control system modeling and simulation analysis were carried out in Matlab/Simulink software.The results show that compared with the conventional PID and fuzzy PID control methods,the variable universe fuzzy PID control method has better advantages in response speed,steady-state regulation time and steady-state accuracy,and is suitable for application in the system with higher control requirements.