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Linear Trim Solution: update range calculation when NLinTimes=1 #3156

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Merged
deslaughter merged 1 commit into from
Jan 20, 2026
+10 −4
Merged

Linear Trim Solution: update range calculation when NLinTimes=1 #3156

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14 changes: 10 additions & 4 deletions modules/openfast-library/src/FAST_Lin.f90
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Original file line number Diff line number Diff line change
Expand Up @@ -6928,10 +6928,16 @@ SUBROUTINE ComputeOutputRanges(p_FAST, y_FAST, m_FAST, y_SrvD)

! note that op_y may be larger than SizeLin if there are orientations; also, we are NOT including the WriteOutputs

do indx = 1,y_FAST%Lin%Glue%SizeLin(LIN_OUTPUT_COL)
m_FAST%Lin%y_ref(indx) = maxval( m_FAST%Lin%Y_prevRot( indx, : ) ) - minval( m_FAST%Lin%Y_prevRot( indx, : ) )
m_FAST%Lin%y_ref(indx) = max( m_FAST%Lin%y_ref(indx), 0.01_ReKi )
end do
if (p_FAST%NLinTimes == 1) then ! NOTE: maxval( m_FAST%Lin%Y_prevRot( indx, : ) ) - minval( m_FAST%Lin%Y_prevRot( indx, : ) ) = 0 in this case
do indx = 1,y_FAST%Lin%Glue%SizeLin(LIN_OUTPUT_COL)
m_FAST%Lin%y_ref(indx) = max( abs(m_FAST%Lin%Y_prevRot( indx, p_FAST%NLinTimes )), 0.01_ReKi )
end do
else
do indx = 1,y_FAST%Lin%Glue%SizeLin(LIN_OUTPUT_COL)
m_FAST%Lin%y_ref(indx) = maxval( m_FAST%Lin%Y_prevRot( indx, : ) ) - minval( m_FAST%Lin%Y_prevRot( indx, : ) )
m_FAST%Lin%y_ref(indx) = max( m_FAST%Lin%y_ref(indx), 0.01_ReKi )
end do
end if

! special case for angles:
indx = Indx_y_Yaw_Start(y_FAST, Module_ED) ! start of ED where Yaw, YawRate, HSS_Spd occur (right before WriteOutputs)
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