expt_5

%open loop response

s=tf('s')
num=1;
t=0:0.01:10
den=[1 10 20];
sys=tf(num,den)
subplot(3,2,1);
step(sys);
stepinfo(sys)
%response with p conroller

Kp=300;
sys1=feedback(Kp*sys,1);
subplot(3,2,2);
step(sys1);
stepinfo(sys1)

%reponse with PI controller

Ki=500;
C=Kp+(Ki/s);
sys2=feedback(C*sys,1);
subplot(3,2,3);
step(sys2);
stepinfo(sys2);

%response with PD contoller

Kd=50;
C1=Kp+(Kd*s);
sys3=feedback(C1*sys,1);
subplot(3,2,4);
step(sys3);
stepinfo(sys3);

%PID controller

C2=Kp+(Ki/s)+(Kd*s);
sys4=feedback(C2*sys,1);
subplot(3,2,5);
step(sys4);
stepinfo(sys4);