Disable torque data in FAST

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Mikael.Hill
Posts: 2
Joined: Tue Sep 03, 2019 9:09 pm
Organization: Ledstars AB
Location: Sweden

Disable torque data in FAST

Postby Mikael.Hill » Tue Sep 10, 2019 4:11 pm

Hello,


I’m trying to figure out how to keep my rotor steady at a certain speed in FAST, but I keep experiencing variations.
Is there a quick way or a setting I can adjust to disable simulation data for the aerodynamic / generator torques, so that I can test without their effects?

Thanks!

Jason.Jonkman
Posts: 4347
Joined: Thu Nov 03, 2005 4:38 pm
Location: Boulder, CO
Contact:

Re: Disable torque data in FAST

Postby Jason.Jonkman » Wed Sep 11, 2019 6:57 am

Dear Mikael,

Disabling the generator degree of freedom (GenDOF) will force the generator to spin at a constant speed regardless of the torques applied. Disabling the drivetrain-torsion DOF (DrTrDOF) will also eliminate the torsional flexibility of the shaft (so if both GenDOF and DrTrDOF = False, the rotor speed will be constant regardless of the torques applied).

Best regards,
Jason Jonkman, Ph.D.
Senior Engineer | National Wind Technology Center (NWTC)

National Renewable Energy Laboratory (NREL)
15013 Denver West Parkway | Golden, CO 80401
+1 (303) 384 – 7026 | Fax: +1 (303) 384 – 6901
nwtc.nrel.gov

Mikael.Hill
Posts: 2
Joined: Tue Sep 03, 2019 9:09 pm
Organization: Ledstars AB
Location: Sweden

Re: Disable torque data in FAST

Postby Mikael.Hill » Sun Sep 22, 2019 5:03 am

Thank you for replying, it took me quite a while, but I finally managed to shed some light on it by reading more about it, which finally led me back here and previous posts. Was really driving me nuts for a while there. :lol:
Image Thank you!!
Image


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