基于模糊PID控制的数控机床伺服系统建模与仿真研究

Modeling and Simulation Research of NC Machine Servo System Based on Fuzzy PID Control

在数控机床加工过程中伺服系统具有多变量、非线性,强耦合的特点,传统PID控制已经不能满足其控制要求,该文设计了一种模糊PID控制器应用于数控机床伺服系统之中,最后利用MATLAB的Simulink仿真了这种控制器,经与传统PID控制器响应的对比,表明这种控制器在响应速度、鲁棒性方面得到提高,并具备精度高、无超调的特点,改善了数控机床伺服系统的整体控制性能。

The servo system of the NC machine features with multivariable, nonlinearand strong coupling in the processing. Traditional PID control has not been able to meetthe control requirements. This paper has designed one type of Fuzzy PID controller touse in NC Machine Servo System. Simulate the response of Fuzzy PID controller andtraditional PID controller by Simulink in MATLAB. The simulation results indicated thatthe Fuzzy PID controller had quick response speed, strong robustness, high precisionand non-overshoot etc. It improved the whole control performance of NC Machine ServoSystem.