Re: Enquires on Positional + Velocity Type of PID output
by Emiel
I think the author meant that he can control a velocity or position directly through changes on the output of the controller.
For example if you apply a voltage to a DC motor it will determine a speed, as speed is proportional to the applied voltage. If the controller would control current then this would have a proportional influence on the delivered torque.
The kind of consequence an action by the pi controller output has, is purely dependent of the connected process and the inputs and measurable outputs that are available. On this point one should always consider to design or find those inputs and outputs that make the process easier to control. This is most of the time a pure matter of the dynamics that is behind it and this involves either a frequency/phase spectrum analysis or practical trial and error (as is most frequently done for PI control)