Issue with writing ServoDyn input file via fast-io Rosco-Toolbox

[Yuksel-Rudy]

Hello developers,
So I was trying to use the reading and writing capabilities of fast-io in ROSCO toolbox. I ran into an issue with the method write_ServoDyn in FAST_writer.py, specifically when writing input data under - STRUCTURAL CONTROL - section. The issue was with writing StC file names. For example:

Intended output for line 67 in ServoDyn input file:
"unused" BStCfiles - Name of the files for blade structural controllers (quoted strings) [unused when NumBStC==0]
actual output using write_ServoDyn:
"u" "n" "u" "s" "e" "d" BStCfiles - Name of the files for blade structural controllers (quoted strings) [unused when NumBStC==0]

I fixed the issue in my forked version by changing lines 1296, 1298,1300, and 1302 in FAST_writer.py as follows:

Old:
f.write('{!s:<22} {:<11} {:}'.format('"' + '" "'.join(self.fst_vt['ServoDyn'] ...
New:
f.write('{!s:<22} {:<11} {:}'.format('"' + ''.join(self.fst_vt['ServoDyn'] ...

To replicate the error using a simple python script:

import os
from ROSCO_toolbox.ofTools.fast_io.FAST_reader import InputReader_OpenFAST
from ROSCO_toolbox.ofTools.fast_io.FAST_writer import InputWriter_OpenFAST 

this_dir = os.path.dirname(os.path.abspath(__file__))

fast = InputReader_OpenFAST(FAST_ver='OpenFAST')

fast.FAST_InputFile = 'IEA-15-240-RWT-UMaineSemi.fst'  # FAST input file (ext=.fst)
fast.FAST_directory = os.path.join(this_dir,'../Test_Cases/IEA-15-240-RWT-UMaineSemi') # FAST directory

fast.read_ServoDyn()

fastout = InputWriter_OpenFAST(FAST_ver='OpenFAST')
fastout.fst_vt = fast.fst_vt

fastout.write_ServoDyn()

I hope this helps.
Best

[dzalkind]

Thanks, Rudy! I have seen this before, too. Thanks for the nice instructions and sorry for the long delay. I'll leave this open until we implement your suggested fix.

Dan

[dzalkind]

Hi Rudy,

I implemented this fix in #167 Thanks!

Dan