how to apply PID controller on dynamic system in state space form? example please

dynamic equation MX'' + CX' + KX=F; In state space form x'(t) = Ax(t) + Bu(t); y(t) = Cx(t) + Du(t); PID gain u=Kp.e(t) + Ki. integration of e(t) + Kd. differentiation of e(t); where e(t)=output -input;

Answer 1

[Sebastian Castro]

You can create a PID controller using the pid function:

http://www.mathworks.com/help/control/ref/pid.html

Then, you can use feedback function to connect to your system:

http://www.mathworks.com/help/control/ref/feedback.html

C = pid(Kp,Ki);
G = ss(A,B,C,D);
closedLoop = feedback(G*C,1);

- Sebastian

[MOHAMMAD AMIR]

Thank you sir.

[MOHAMMAD AMIR]

sir how this program will change if x'(t) = Ax(t) + B*u(t)+Bphi*Uphi(t); y(t) = Cx(t) + Du(t); PID controller. In short how to use two inputs in PID controller u(t) and Uphi(t), to get x response of the system. Please help

Answer 2

[Ali ÇEtin]

Error using DynamicSystem/ss (line 82)

Invalid syntax for the "ss" command. Type "help ss" for more information.

Error in Passivestatespace (line 15)

SYS = ss(A,B,C,D,Ts);

Give me this error.Could you help me ?

[Vehzan Rustomji]

Could you elaborate on this? Show how you implemented the code that resulted in this error.