利用模糊逻辑系统实现函数逼近的仿真研究

针对不确定性非线性系统，基于Wang L X提出的模糊辨识器的设计原理,给出了基于模糊逻辑系统实现函数逼近的方法，该方法通过采用中心平均模糊消除器和隶属函数，实时地调整参数来实现未知函数、尤其是非线性函数的逼近。通过适宜选择初始参数可使模糊逻辑系统在任意精度上逼近真实系统。该文给出了实现函数逼近的具体算法、步骤和程序流程，并利用MATLAB语言编写了实现函数逼近的通用程序，在工程中可利用此通用程序实现对未知作用函数的近似估算，具有一定的工程实际使用价值。实例仿真取得了良好的效果。

Simulation of Function Approximation Based on Fuzzy Logic System

A method of function approximation for nonlinear system is proposed in this paper .It is based on the fuzzy identificator therom presented by Wang Li -xin and the fuzzy logic system. This method can be realizied ,especially to the nonlinear function by using fuzzy eliminator and the membership function and by adjusting the parameters.It can approximate the true system at random precision by selecting the better original parameters .This paper gives the algorithm,steps and the program procedure. By using MATLAB a general practicable program is written..The program is very useful in the work..At last this paper gives the simulation example and good result is obtained.