Want to tune DC motor position control system

I am desinging a controller for a dynamic system, I'm struggling to determine the appropriate controller parameters to achieve the desired closed-loop performance for a DC motor position control system. The motor exhibits significant overshoot and oscillations during step response, and I don't know how to tune the controller to mitigate these issues.

Answer 1

[Hari]

Hi Rakesh,

I understand that you are trying to design a controller for a dynamic system using the Control System Toolbox in MATLAB but you are facing an issue in identifying the appropriate controller parameters to remove significant overshoot and oscillations in a DC motor position control system during step response.

To find the controller parameters effectively for the DC motor position control system, you can automate the tuning process in MATLAB.

Automated tuning methods, such as PID tuner or control system tuning tools in MATLAB, use algorithms to automatically adjust the controller parameters to meet specified performance criteria.

Here's an example of how to use the PID tuner in MATLAB for automated tuning:

% Create a PID controller object
% define the parameters of your system and create the controller

% Specify performance criteria
% For example, settling time < 2 seconds, overshoot < 10%
options = pidtuneOptions('DesignFocus','reference-tracking','CrossoverFrequency',wc);

% Tune the PID controller automatically
[controller_tuned, info] = pidtune(sys, 'pid', options);

Refer to the documentation of "pidtune" function for more information on tuning controller parameters effectively.

https://www.mathworks.com/help/control/ref/dynamicsystem.pidtune.html

For further details on controller design and tuning, refer the MATLAB Control System Toolbox documentation.

https://www.mathworks.com/help/control/

Hope this helps!