How do I determine a good value for ki term in controller?
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Rookie controls question here:
Here is an image of my controller:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/317502/image.gif)
The controller works fine when I set the ki = 0, but holds a 5m error. My controller diverges after 150 seconds when I set the ki value to -.01. what is a good way to determine the appropriate ki value?
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Ameer Hamza
2020-6-17
I suggest using the PID controller block: https://www.mathworks.com/help/releases/R2020a/simulink/slref/pidcontroller.html, which has a built-in tune option.
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Ameer Hamza
2020-6-18
It seems that there is some instability in your system. Therefore, the tuning function of the PID block failed. In that case, I guess you need to follow the manual tuning methods mentioned here: https://en.wikipedia.org/wiki/PID_controller#Manual_tuning
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