Good afternoon,
I have an experiment in the works that I was hoping you folks could assist me with! I am attempting to derive the transfer function of a motor/propeller using the frequency response method. I have already created a VI that reads all of the outputs of the sensors on the test stand (propeller RPM, Force, and Torque) using the NI 9205 module (attached VI). However now I am attempting to provide the input to the speed controller (takes a 50Hz PWM signal) by using the frequency response sinusoidal input
u(t) = A sin (2*pi*freq*time)
I am confused as to how I go from this frequency response input to a PWM input at different duty cycles for the ESC (speed controller) using an NI 9264 AO module? Can anyone provide any assistance or point me in the right direction?
My attempt of beginning this input VI can be seen in the attached file (FR.vi) I am creating this sinusoidal input but am not too sure where to go from here..
Your help is much appreciated,
Robert
