基于单片机高精度PID模糊算法程控电源方案设计

模糊-PID控制技术运用到程控电压源的设计中，从而使得电压源的输出电压值达到预定的要求，提高输出电压的精度和反应速度。

采用51单片机，利用adc0832和DAC0832，通过220V市电通过整流得到 12V再由12V转5V。LM358搭配DAC0832电路实现电压的输出。通过ADC采集。

最终得到电压。

1：电压的整定时间小于0.5S

2：电压的精确度再0.02以内

3：论文中涉及到第二种硬件设计方案，使用更高精度的采集。

 

typedef struct{
	float Kp;
	float Ki;
	float Kd;
}PID;


PID fuzzy(int e,int ec)
{
 
     int etemp,ectemp;
     int eLefttemp,ecLefttemp;
     int eRighttemp ,ecRighttemp;
 
     int eLeftIndex,ecLeftIndex;
     int eRightIndex,ecRightIndex;
     PID fuzzy_PID;
     etemp = e > 3.0 ? 0.0 : (e < - 3.0 ? 0.0 : (e >= 0.0 ? (e >= 2.0 ? 2.5: (e >= 1.0 ? 1.5 : 0.5)) : (e >= -1.0 ? -0.5 : (e >= -2.0 ? -1.5 : (e >= -3.0 ? -2.5 : 0.0) ))));
 
     eLeftIndex = (int)e;
     eRightIndex = eLeftIndex;
     eLeftIndex = (int)((etemp-0.5) + 3);        //[-3,3] -> [0,6]
     eRightIndex = (int)((etemp+0.5) + 3);
 
     eLefttemp =etemp == 0.0 ? 0.0:((etemp+0.5)-e);
     eRighttemp=etemp == 0.0 ? 0.0:( e-(etemp-0.5));
 
     ectemp = ec > 3.0 ? 0.0 : (ec < - 3.0 ? 0.0 : (ec >= 0.0 ? (ec >= 2.0 ? 2.5: (ec >= 1.0 ? 1.5 : 0.5)) : (ec >= -1.0 ? -0.5 : (ec >= -2.0 ? -1.5 : (ec >= -3.0 ? -2.5 : 0.0) ))));
 
     ecLeftIndex = (int)((ectemp-0.5) + 3);        //[-3,3] -> [0,6]
     ecRightIndex = (int)((ectemp+0.5) + 3);
 
     ecLefttemp =ectemp == 0.0 ? 0.0:((ectemp+0.5)-ec);
     ecRighttemp=ectemp == 0.0 ? 0.0:( ec-(ectemp-0.5));
 
/*************************************反模糊*************************************/
	fuzzy_PID.Kp =    (eLefttemp * ecLefttemp *  fuzzyRuleKp[ecLeftIndex][eLeftIndex]                    
					+ eLefttemp * ecRighttemp * fuzzyRuleKp[ecRightIndex][eLeftIndex]
					+ eRighttemp * ecLefttemp * fuzzyRuleKp[ecLeftIndex][eRightIndex]
					+ eRighttemp * ecRighttemp * fuzzyRuleKp[ecRightIndex][eRightIndex]);
 
	fuzzy_PID.Ki =   (eLefttemp * ecLefttemp * fuzzyRuleKi[ecLeftIndex][eLeftIndex]
					+ eLefttemp * ecRighttemp * fuzzyRuleKi[ecRightIndex][eLeftIndex]
					+ eRighttemp * ecLefttemp * fuzzyRuleKi[ecLeftIndex][eRightIndex]
					+ eRighttemp * ecRighttemp * fuzzyRuleKi[ecRightIndex][eRightIndex]);
 
	fuzzy_PID.Kd =    (eLefttemp * ecLefttemp *    fuzzyRuleKd[ecLeftIndex][eLeftIndex]
					+ eLefttemp * ecRighttemp * fuzzyRuleKd[ecRightIndex][eLeftIndex]
					+ eRighttemp * ecLefttemp * fuzzyRuleKd[ecLeftIndex][eRightIndex]
					+ eRighttemp * ecRighttemp * fuzzyRuleKd[ecRightIndex][eRightIndex]);

【资源下载】下载地址如下（789）：https://docs.qq.com/doc/DTlRSd01BZXNpRUxl