My system consist of set of equations. How to implement PID controller for my system ?

How to make it closed loop ?

Answer 1

[Arkadiy Turevskiy]

In a simple case of a mass spring damper mx''+cx'+kx=F

convert system equations to a transfer function

m=1;c=1;k=1; %replace with your own values
plant=1/(m*s^2+c*s+k);

Now define a controller

C=5; %simple proportinal gain
C=pid(5,1); % PI compensator

Compute closed loop transfer function and plot step response:

CL=feedback(C*plant,1);
step(CL);

HTH.