由于项目需要，需要模糊控制算法，之前此类知识为0，经过半个多月的研究，终于有的小进展。

开始想从强大的互联网上搜点c代码来研究下，结果搜遍所有搜索引擎都搜不到，以下本人从修改的模糊控制代码，经过自己修改后可在vc6.0，运行！输入e表示输出误差，ec表示误差变化率，经过测试具有很好的控制效果，对于非线性系统和数学模型难以建立的系统来说有更好的控制效果！现将其公开供大家学习研究！#include <stdio.h>#include"math.h"#define PMAX 100#define PMIN -100#define DMAX 100#define DMIN -100#define FMAX 100 /*语言值的满幅值*/int PFF[4]={0,12,24,48};/*输入量D语言值特征点*/int DFF[4]={0,16,32,64};/*输出量U语言值特征点*/int UFF[7]={0,15,30,45,60,75,90};/*采用了调整因子的规则表,大误差时偏重误差,小误差时偏重误差变化*//*a0=0.3,a1=0.55,a2=0.74,a3=0.89 */int rule[7][7]={//误差变化率 -3,-2,-1, 0, 1, 2, 3 // 误差{-6,-6,-6,-5,-5,-5,-4,}, // -3{-5,-4,-4,-3,-2,-2,-1,}, // -2{-4,-3,-2,-1, 0, 1, 2,}, // -1{-4,-3,-1, 0, 1, 3, 4,}, // 0{-2,-1, 0, 1, 2, 3, 4,}, // 1{ 1, 2, 2, 3, 4, 4, 5,}, // 2{ 4, 5, 5, 5, 6, 6, 6}}; // 3/**********************************************************/int Fuzzy(int P,int D) /*模糊运算引擎*/{int U; /*偏差,偏差微分以及输出值的精确量*/ unsigned int PF[2],DF[2],UF[4]; /*偏差,偏差微分以及输出值的隶属度*/int Pn,Dn,Un[4];long temp1,temp2;/*隶属度的确定*//*根据PD的指定语言值获得有效隶属度*/if(P>-PFF[3] && P<PFF[3]){if(P<=-PFF[2]){Pn=-2;PF[0]=FMAX*((float)(-PFF[2]-P)/(PFF[3]-PFF[2]));}else if(P<=-PFF[1]){Pn=-1;PF[0]=FMAX*((float)(-PFF[1]-P)/(PFF[2]-PFF[1]));}else if(P<=PFF[0]){Pn=0;PF[0]=FMAX*((float)(-PFF[0]-P)/(PFF[1]-PFF[0]));}else if(P<=PFF[1]){Pn=1; PF[0]=FMAX*((float)(PFF[1]-P)/(PFF[1]-PFF[0]));}else if(P<=PFF[2]){Pn=2; PF[0]=FMAX*((float)(PFF[2]-P)/(PFF[2]-PFF[1]));}else if(P<=PFF[3]){Pn=3; PF[0]=FMAX*((float)(PFF[3]-P)/(PFF[3]-PFF[2]));}}else if(P<=-PFF[3]){Pn=-2; PF[0]=FMAX;}else if(P>=PFF[3]){Pn=3; PF[0]=0;}PF[1]=FMAX-PF[0];if(D>-DFF[3] && D<DFF[3]){if(D<=-DFF[2]){Dn=-2;DF[0]=FMAX*((float)(-DFF[2]-D)/(DFF[3]-DFF[2])); }else if(D<=-DFF[1]){Dn=-1;DF[0]=FMAX*((float)(-DFF[1]-D)/(DFF[2]-DFF[1]));}else if(D<=DFF[0]){Dn=0;DF[0]=FMAX*((float)(-DFF[0]-D)/(DFF[1]-DFF[0]));}else if(D<=DFF[1]){Dn=1;DF[0]=FMAX*((float)(DFF[1]-D)/(DFF[1]-DFF[0]));}else if(D<=DFF[2]){Dn=2; DF[0]=FMAX*((float)(DFF[2]-D)/(DFF[2]-DFF[1]));}else if(D<=DFF[3]){Dn=3; DF[0]=FMAX*((float)(DFF[3]-D)/(DFF[3]-DFF[2]));}}else if(D<=-DFF[3]){Dn=-2;DF[0]=FMAX;}else if(D>=DFF[3]){Dn=3;DF[0]=0;}DF[1]=FMAX-DF[0];/*使用误差范围优化后的规则表rule[7][7]*//*输出值使用13个隶属函数,中心值由UFF[7]指定*//*一般都是四个规则有效*/Un[0]=rule[Pn-1+3][Dn-1+3];Un[1]=rule[Pn+3][Dn-1+3];Un[2]=rule[Pn-1+3][Dn+3];Un[3]=rule[Pn+3][Dn+3];if(PF[0]<=DF[0])UF[0]=PF[0];elseUF[0]=DF[0];if(PF[1]<=DF[0])UF[1]=PF[1];elseUF[1]=DF[0];if(PF[0]<=DF[1])UF[2]=PF[0];elseUF[2]=DF[1];if(PF[1]<=DF[1])UF[3]=PF[1];elseUF[3]=DF[1];/*同隶属函数输出语言值求大*/if(Un[0]==Un[1]){if(UF[0]>UF[1])UF[1]=0;elseUF[0]=0;}if(Un[0]==Un[2]){if(UF[0]>UF[2])UF[2]=0;elseUF[0]=0;}if(Un[0]==Un[3]){if(UF[0]>UF[3])UF[3]=0;elseUF[0]=0;}if(Un[1]==Un[2]){if(UF[1]>UF[2])UF[2]=0;elseUF[1]=0;}if(Un[1]==Un[3]){if(UF[1]>UF[3])UF[3]=0;elseUF[1]=0;}if(Un[2]==Un[3]){if(UF[2]>UF[3])UF[3]=0;elseUF[2]=0;}/*重心法反模糊*//*Un[]原值为输出隶属函数标号，转换为隶属函数值*/if(Un[0]>=0)Un[0]=UFF[Un[0]];elseUn[0]=-UFF[-Un[0]];if(Un[1]>=0)Un[1]=UFF[Un[1]];elseUn[1]=-UFF[-Un[1]];if(Un[2]>=0)Un[2]=UFF[Un[2]];elseUn[2]=-UFF[-Un[2]];if(Un[3]>=0)Un[3]=UFF[Un[3]];elseUn[3]=-UFF[-Un[3]];temp1=UF[0]*Un[0]+UF[1]*Un[1]+UF[2]*Un[2]+UF[3]*Un[3]; temp2=UF[0]+UF[1]+UF[2]+UF[3];U=temp1/temp2;return U;}void main(){int a=0,e,ec;/*int nowpoint,p1,p2=1;FILE *in,*out;in=fopen("in.txt","r");out=fopen("out.txt","w");*///while(!feof(in))while(1){//fscanf(in,"%d",&nowpoint);//p1=nowpoint;//e=0-nowpoint;//ec= p1-p2;printf("请输入e:");scanf("%d",&e);printf("请输入ec:");scanf("%d",&ec);a=Fuzzy(e,ec);//fprintf(out,"%d ",a);//printf("%d: ",p1);printf("e: %d ec: %d ",e,ec); printf("a: %d \n",a);//p2=p1;}//fclose(in);//fclose(out);}。