交流电机模糊控制器隶属函数分析与设计

Analysis and Design of Membership Function of AC Motor’ s Fuzzy Controller

模糊控制作为一种智能控制技术在交流电机调速系统中得到了广泛的应用。模糊控制器中模糊子集个数的选取以及隶属函数形状的选择无疑会对系统产生一定的影响。本文分析给出了输入输出隶属度与模糊子集个数之间的函数关系,并且分析了三角形,梯形和高斯型三种隶属函数的优缺点。最后,在MATLAB/SIMULINK中搭建了交流电机矢量控制仿真平台,通过仿真验证了分析的正确性。

Fuzzy control as one of intelligent control methods has been widely used in AC motor drives.The number of fuzzy subset and the shape of membership function in fuzzy controller can affect the performance of the system. The paper analyzes the relationship between degree of fulfillment and the number of fuzzy subset,and the strength and weakness of triangle,trapezoid and Gaussian for the shape of membership function are also presented.At last, the simulation is investigated in the MATLAB/SIMULINK and the results confirm the validity of the analysis.