Dear Parag Patil,

I suggest you to see links and attached file on topic.

https://www.mathworks.com/help/control/examples/designing-pid-for-disturbance-rejection-with-pid-tuner.html

https://www.mathworks.com/help/control/ug/pid-tuning-for-setpoint-tracking-vs-disturbance-rejection.html

Article Tuning of PID Controllers using Simulink

Best regards

Thank you Mohamed-Mourad Lafifi for your suggested links. However, I have a script written for a system in detailed ( I do not have its simulink model, and not intended to do it). I wanted to know a reference where the PID-controller's code is used.

I cannot use the inbuilt PID-controllers from MATLAB and Simulink

Thanks

Dear Parag,

You may use the following inbuilt function for writing script.

https://www.mathworks.com/help/control/ref/pid.html,

Or, you can search pseudo code for PID. You will get on Google.