For simple transfer function getting different result in matlab code and simulink for same pid values.

Hi, any body is having answer for following problem:

I am Getting different results while simulting Step response for simple transfer function g= (23.2)/(0.13 s^2 + s) in matlab code and simulink with PID controller (p=1.4175e+03 i=1.5559e+03 d=158.1210). I have attached both results: Fig1 by using matlab step command for plant and controller, whereas fig2 for simulink with same plant and controller.

Answer 1

[Mischa Kim]

Sadeep, Fig 1. looks very much like the step input (rather than the step response). Compare this figure to

 g = tf(1,1)
 g =
   1
 Static gain.
 step(g)

Please post your MATLAB code so we can help.