This example shows the comparison of three DC motor control techniques for tracking setpoint commands and reducing sensitivity to load disturbances
A simplified model of the DC motor is shown above. The torque Td models load disturbances. You must minimize the speed variations induced by such disturbances.
For this example, the physical constants are:
In armature-controlled DC motors, the applied voltage Va controls the angular velocity w of the shaft.
Click on the curves to read the gain values and related info. A reasonable choice here is K = 5. Note that the SISO Design Tool offers an integrated GUI to perform such designs (help sisotool for details).
Compare this new design with the initial feedforward design on the same test case:
You can use this simple feedforward control structure to command the angular velocity w to a given value w_ref.