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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 a kind of intelligent control technology has been widely used in AC motor speed control system. The selection of the number of fuzzy subsets in fuzzy controller and the choice of shape of membership function will undoubtedly affect the system. This paper analyzes the relationship between the membership degree of input and output and the number of fuzzy subsets, and analyzes the advantages and disadvantages of three membership functions of triangle, trapezoid and Gauss. Finally, a simulation platform of AC motor vector control is built in MATLAB / SIMULINK, and the correctness of the analysis is verified through simulation.