PID Command in MATLAB

I am having problem in solving Simulink Model in MATLAB.

I tried to solved this using following code

s=tf('s')
Phi=193.4/(s^2)
K_Phi=pid(0.3,0,0.2,100)
Phi_1=feedback(K_Phi*Phi,1,-1)
step(Phi_1)

I also tried on more method

K_Phi=pid(0.3,0,0.2,100)
Phi_1=feedback(Phi,1,-1)
Phi_2=Phi_1*K_Phi
step(Phi_2)

But, both ways aren't working kindly help me in solving this.

Answer 1

[Muhammad Adeel Ahsan Awan]

Well , i got the answer.

s=tf('s')
Phi=193.4/(s^2)
K_Phi=pid(0.3,0,0.2)
Phi_1=feedback(K_Phi*Phi,1)
step(Phi_

The Problem was using this PID command.

Answer 2

[madhan ravi]

I think you should use lsim(...) because there’s a step input to the model.

[Muhammad Adeel Ahsan Awan]

Like how?

I don't understant what do you mean.