NWTC

thanks for your help. i read it. There, it is said that ωn = 4Ω, where Ω is the rotor angular velocity and I've considered 20,463 rpm for the rotor speed and it is said ξ = 80% of critical damping. I want to know how much the critical damping value is? Yes i am working FAST-Simulink interface now. b...

hi every one
How much should be used to the value of time constant of the 1.5 MW wind turbine pitch actuator for the FAST reference turbine?

Yes, I'm running from Simulink.

No I did not enable these. I just set PCMODE to 4 and then run the simulation.

Hi everyone
I'm working on individual pitch control and set PCMode to 4 to get the pitch command from the simulink controller but the pitch remains fixed to the final value of 2.6 and does not command the simulink. Where is the problem?
thanks

thanks for your answer

I download AeroDyn v15.04 but the AeroDyn Input file related to Test 11-14 (1.5 MW Wind turbine) does not exist. How to find it?

hi mr jonkman Error reported by S-function 'FAST_SFunc' in 'OpenLoopA/FAST Nonlinear Wind Turbine/S-Function': FAST_Solution:FAST_AdvanceStates:AD_UpdateStates:BEMT_UpdateStates(node 3, blade 3):BEMT_UnCoupledSolve:DeterminePhiBounds:There is no valid value of phi for these operating conditions! Vx ...

thanks.

i need the nonlinear differential equations of the wind turbine for region 3 goals.
But I can not find them.

thanks.

Thank you very much for your help
Now, my question is, as you say, since non-linear equations of region 3 wind turbines are not specifically available, so can not design nonlinear controllers which require nonlinear dynamics?

thanks
and So, my question is, a nonlinear relation between the pitch angle and the rotor speed is available?

theta is the output pitch angle given into the model.
Is it possible to email The nonlinear equations of motion used by FAST to me ?
My work depends heavily on having nonlinear equations of motion and pitch actuator.

thanks for your help.

Hello thanks for your answer To design a non-linear controller, I must have a nonlinear equation of pitch actuator and blade root bending moment related to the 13th test of FAST8.16. Can you give me them? In fact, I want the nonlinear relation of the attached equation related to the 13th test of FAS...

hello i have a question about linearization.I want to design a PID controller for pitch control. I need to use linearization and must pcmode = 0 in the linearization, but in this mode, the pitch control command is not taken from the simulink and the pitch angles are commanded zero. How can I use pcm...

hello I want to design a nonlinear individual pitch controller for wind turbine load reduction in my master's thesis, but I don't have the nonlinear state-space model of the 1.5 MW wind turbine available in the FAST test. It is essential for me to have those non-linear equations to design a nonlinea...