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- #include "pid.h"
- PID pid;
- extern u16 pidcalcms;
- void PIDParament_Init() //
- {
- pid.set =100;
- pid.currpwm=0;
- pid.pwm_cycle=100; //
- // pid.pid_P=8;
- // pid.pid_I=4;
- // pid.pid_D=5;
- pid.calc_cycle=100;
-
- pid.Td=2000;
- pid.Ti=4000;
- pid.Kp=5;
- pid.Tsam=500;
- }
- /*
- void pid_calc() //pid??
- {
- //int dk;
-
- short PID_out;
-
- if(pidcalcms<pid.calc_cycle) return ;
- pid.Ek=pid.set-pid.curr;//????(????-????)
- PID_out=((pid.pid_P)*((pid.Ek)-(pid.Ek_1)))+ \
- ((pid.pid_I)*(pid.Ek))+ \
- ((pid.pid_D)*((pid.Ek)-(2*(pid.Ek_1))+(pid.Ek_2))); //??????
- pid.currpwm+=PID_out;
- pid.Ek_2=pid.Ek_1; //???????
- pid.Ek_1=pid.Ek; //??????
- if(pid.currpwm>pid.pwm_cycle) //1000 //1s??PWM??
- {
- pid.currpwm=pid.pwm_cycle; //????????1000???????
- }
- if(pid.currpwm<=0) //??????0??0??(????)
- {
- pid.currpwm=0;//
- } //PID????
- pidcalcms=0;
- }
- */
- void pid_calc() //pid??
- {
- float dk1;float dk2;
- float t1,t2,t3;
-
- //short PID_out;
-
- if(pidcalcms<pid.Tsam) return ; //
- pid.En=pid.set-pid.curr; //本次誤差
- dk1=pid.En-pid.En_1; //本次偏差與上次偏差之差
- dk2=pid.En-2*pid.En_1+pid.En_2;
-
- t1=pid.Kp*dk1;
-
- t2=(pid.Kp*pid.Tsam)/pid.Ti;
- t2=t2*pid.En;
-
- t3=(pid.Kp*pid.Td)/pid.Tsam;
- t3=t3*dk2;
-
- pid.Dout=t1+t2+t3; //本次應(yīng)該輸出的增量
- pid.currpwm+=pid.Dout; //本次應(yīng)該輸出的PWM
- if(pid.currpwm>pid.pwm_cycle)
- {
- pid.currpwm=pid.pwm_cycle;
- }
- if(pid.currpwm<0)
- {
- pid.currpwm=0;
- }
- pid.En_2=pid.En_1;
- pid.En_1=pid.En;
-
- pidcalcms=0;
- }
- 注釋掉的為位控制算法
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