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const float code WaterLevel_FuzzyControl_table[7][7]=
// NL NM NS ZO PS PM PL
{
3, 3, 3, 3, 2, 1, 0, //NL
3, 3, 3, 2, 1, 0, 0, //NM
3, 3, 2, 0, 0, 0, 0, //NS
0, 0, 0, 0, 0, 0, 0, //ZO
0, 0, 0, 0,-2,-3,-3, //PS
0, 0,-1,-2,-3,-3,-3, //PM
0,-1,-2,-3,-3,-3,-3 //PL
};
/*
函數名稱:隸屬度計算函數
參數：x為清晰值對應的模糊值，x0，x1，x2為端點中點值
a,b,c為過程隸屬度，u為最終隸屬度
*/
float Membership( char x0, char x1, char x2, float x)
{
float a,b,c,u;//r,
//r = x1-x0; //相似三角形算法
//if(r == 0)
// r = 0.001; //保證分母不為零
a = (x-x0)/(x1-x0);//r;
//r = x2-x1;
//if(r == 0)
// r = 0.001;
b = (x2-x)/(x2-x1);//r;
/* tanx算法 tanx=1
a = x-x0;
b = x2-x;
*/
if(a <= b) //比較取小
c = a;
else
c = b;
if(c < 0) //若隸屬度小于零，則強制為零
u = 0; //隸屬度為什么等于零
else
u = c;
return u; //返回隸屬度
}
/*
函數名稱：控制函數
參數：入口參數WL;WLE水位偏差;WLEC偏差變化；
WLFlag水位控制標志;WL0上一次的水位值;
WLE0為上一次的水位偏差;WLOut為累計的水位控制輸出；
K為水位控制輸出比例因子。
*/
unsigned int Control_Fuzzy(unsigned char WL)
{
/*float ControlOut;
ControlOut = WL;*/
static unsigned char WL0 = 0, WLE0 = 0 ;//WLOut = 127 ,;
float ControlOut,WLE,WLEC;//,CG = 0
float code K = 2.67;
char i,j;//,k = 0
static char WLFlag = 0;
float MembershipE[7],MembershipEE[7];// //定義隸屬度值緩沖區
if(WLFlag == 1) goto FC; //滿足條件，進入模糊控子程序
//*************水位異常報警**************
if(WL <= 106) //水位超低
{
if(WL0 == 0) //第一次進入程序不進行控制
{
ControlOut = 0;
WL0 = WL;
}
else //否則報警
{
ControlOut = 0xff;
//Alarm();
}
}
else if (WL >= 150) //水位超高
{
if(WL0 == 0) //第一次進入程序不進行控制
{
ControlOut = 0;
WL0 = WL;
}
else //否則報警
{
ControlOut = 0;
//Alarm();
}
}
//爆管與虛假水位報警
WLE = WL - WL0; //計算水位偏差及其變化
WLEC = WLE - WLE0;
WL0 = WL;
if(WLEC*10 <= -1) //爆管
{
ControlOut = 0xff;
//Alarm();
}
else if(WLEC*10 >= 3)
{
ControlOut = 0; //虛假水位
//Alarm();
}
else
FC:
{
if(WLFlag == 0) //第一次進入程序不進行控制
{
WLFlag = 1;
//K = 2.67;
WLE = (WL - 127)*0.035; //論域轉換
WL0 = WL;
WLE = WLE0;
ControlOut = 0;
}
else
{
WLFlag = 1;
WLE = (WL - 127)*0.035; //論域轉換
WL0 = WL;
WLEC = (WLE0 - WLE)*0.024;
WLEC = WLE;
}
//**************計算WLE的隸屬度************
MembershipE[1] = Membership(-4,-3,-2,WLE);
MembershipE[2] = Membership(-3,-2,-1,WLE);
MembershipE[3] = Membership(-2,-1,-0,WLE);
MembershipE[4] = Membership(-1,-0,1,WLE);
MembershipE[5] = Membership(0,1,2,WLE);
MembershipE[6] = Membership(1,2,3,WLE);
MembershipE[7] = Membership(2,3,4,WLE);
//**************計算WLEC的隸屬度************
MembershipEE[1] = Membership(-4,-3,-2,WLEC);
MembershipEE[2] = Membership(-3,-2,-1,WLEC);
MembershipEE[3] = Membership(-2,-1,-0,WLEC);
MembershipEE[4] = Membership(-1,-0,1,WLEC);
MembershipEE[5] = Membership(0,1,2,WLEC);
MembershipEE[6] = Membership(1,2,3,WLEC);
MembershipEE[7] = Membership(2,3,4,WLEC);
//**************求輸出************
for(i=1;i<8;i++)
{
if(MembershipE[i]>0)
{
i=i;
}
}
for(j=1;j<8;j++)
{
if(MembershipEE[i]>0)
{
j=j;
}
}
ControlOut = WaterLevel_FuzzyControl_table[i][j]*K*16+127; //計算結果并且轉化論域
}
return ControlOut;
}

復制代碼

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