Dear forum,
I hope you managed to solve your error, Florence.
I am simulating a Simulink modelled wind turbine controller against the model of the DTU 10MW reference wind turbine in FAST. For that, I integrated the FAST model in my Simulink model through an S_function. Up to this point, everything works well using TurbSim files as wind speed turbulent input. However, sometimes, for some specific wind speeds and seeds the simulation gets stuck and gives the following error:
[code]FAST completed.
Error using runTest (line 53)
Error reported by S-function ‘FAST_SFunc’ in ‘CTRL_AD8_OFS_WndEstim2013b_05/WTG-MODEL/FAST Nonlinear Wind Turbine/S-Function’:
FAST_Solution:FAST_AdvanceStates:AD_UpdateStates:BEMT_UpdateStates(node 9, blade 3):BEMT_UnCoupledSolve:DeterminePhiBounds:There
is no valid value of phi for these operating conditions! Vx = 12.647, Vy = -0.55046, rlocal = 17.059, theta = 1.4756[/code]
I have checked with several seeds, and I have realised that for the same wind speed it sometimes finishes the simulation depending on which seed is the wind speed based on.
Best regards,
Leire Gandiaga