FAST- directly controlling rpm


Is it possible to directly control the rpm, such as read a file of stepped-rpm inputs? That way I can determine what torque is required for a particular rpm at a particular wind speed.

Dear Scott,

There is no direct way to prescribe the rotor speed in FAST, but if you are willing to change the source code, it may not be too difficult to add this customization yourself. For example, if you are willing to have a rotor acceleration that is inconsistent with the rotor speed – that is having zero rotor acceleration – and associated inconsistencies in the inertia loads, then I would suggest that you disable the generator DOF (meaning that the generator acceleration is zero) and hard code the generator states (azimuth angle and speed) as desired.

Best regards,

Thanks for the tip, I will take a stab at it.