Question

In: Electrical Engineering

what are the steps needed to be done in Matlab in order to design a PID...

what are the steps needed to be done in Matlab in order to design a PID controller? ( i need a step-by-step guidelines) the transfer function is already obtained. how do you adjust the value in order to get the best value for PID controller?

Solutions

Expert Solution

Let, our system be:

First, run this segment of MATLAB Code:

sys=tf(1,[1 2 4]);
pidtool(sys)

NOTE: If you have a different transfer function, define that instead of this one.

This will open the PID controller designer tool for you.

  • Select the Controller type as PID.
  • Select the controlling specifications
  1. Transient Behaviour
  2. Response Time
  • ​​​​​​​After putting all the parameters you can see the controller gains: Kp, Ki, Kd at the bottom-right corner.

  • You can specify Frequency domain parameters by selecting Domain as "Frequency"
  1. ​​​​​​​Bandwidth
  2. Phase Margin

  • Click on the Export symbol
  • Select "Export PID Controller"
  • Click on OK

This will export your designed controller to the Matlab Workspace, and you can access this controller using the default variable name "C".


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