Hi,

I need to set a table containing the airodynamical torques of the wind turbine. Its inputs are constant rotational speed of the turbine, constant wind speed and constant pitch angle. All set points are given by a fixed chebyschev-grid. I already tried to use CalcSteady = True, but found out, that it does not converge for all the set points.

I will discribe, what I did to obtain this table. I went through almost the whole code to understand, if this, what I am doing, is correct. But I still have the feeling, I miss something.

I wrote an own FORTAN program (Visual Studio - Intel Fortran Composer XE 2013). This program is initializing FAST (v7.02.00d-bjj, 20-Feb-2013) and AeroDyn (v13.00.02a-bjj, 20-Feb-2013), but it does not call the integration. I set up FAST with the setpoints (RotSpeed,WindVxi,BlPtich1) like follows:

All DOFs are set FALSE exept of GenDOF = TRUE and CompAero = TRUE. (for the first try)

Then I call a damped Newton method, whose input is (for this number of activated DOFs) the generator torque. Thus, I try to find the value of generator torque such that the acceleration of the rotor (QD2T(DOF_GenAz)) is 0 for this set of RotSpeed,WindVxi,BlPtich1. This worked quite well so far, but even if I use a large number of set points, the dynamics coincides not up to the accuracy I would like to have.

I realized that there are some topics which as to be carefully considered. I need to tell AeroDyn to recalculate the areodynamical torques at each time I call RtHS(). My first question is, what does this correct.

Does AeroDyn calculate different moments if either NoLoadsCalculated in AD_CaclculateLoads() is TRUE or FALSE?

I already realized, that the pitch is not obtained from PitchCntrl() for ZTime = 0.0D+00 etc.

Maybe you know some additional points I should also consider?

I use:

*.fst

YCMode = 0

PCMode = 1

VSContrl = 2

PtfmModel = 0

Furling = False

No NoiseFile

*.ipt

StallMod = STEADY

UseCm = NO_CM

InfModel = EQUIL

IndModel = SWIRL

TLModel = GTECH

HLMODEL = NONE

Thanks in advance and best regards,

Colin