title: Gain value for PI controller using Simulink
body: <p>I am doing project in Matlab Simulink. I want to find the proportional and integral gain value for PI controller. Is there any way to find the PI controller gain value which does not have transfer function? I  have two inputs for PI controller one is the  the reference voltage and  and the other is voltage from the capacitor. Please help me in finding the gain value.</p>
  
  <p>Please let me know if more information is needed.</p>