超磁致伸缩执行器的P-模糊PID控制

Control with P-Fuzzy PID for Giant Magnetostrictive Actuator

在微加工领域应用超致伸缩材料的研究中,为提高超磁致伸缩执行器控制系统的定位精度,根据压磁方程和超磁滞伸缩执行器的动力学特性建立了执行器的数学模型,为加快系统响应速度,提出了将模糊理论及PID理论相结合的控制方案,利用MATLAB模糊逻辑工具箱设计了P-模糊PID控制器。在simulink图形仿真环境下,利用P-模糊PID控制方法和常规PID控制方法进行控制实验。经仿真比较和分析,采用P-模糊PID控制方法优于常规PID控制方法,并且P-模糊PID控制下的系统响应迅速,无超调,调节精度高,可为设计提供参考。

In order to improve the positioning accurary of controlling system for giant magnetostrictive actuator, a mathematical model is established based on piezomagnetic equation and the dynamic characteristic of giant magnetostrictive actuator. Control scheme is presented through the combination of fuzzy and PID, and P-Fuzzy PID controller is designed using MATLAB fuzzy logic toolbox. Under simulink enviromnent, control experiment is done based on P- Fuzzy PID control and conventional PID control. Through the comparison and analysis, it is found that P-Fuzzy PID control is better than conventional PID control, and the P-Fuzzy PID controller enables the system to be of good fast- ness, no-overshoot and very high accuracy.