Shutdown: Add comments and minor code edit

abhineet-gupta · Nov 24, 2024 · 96f1f54 · 96f1f54
1 parent b57df54
commit 96f1f54
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Showing 2 changed files with 6 additions and 1 deletion.
diff --git a/rosco/controller/src/Controllers.f90 b/rosco/controller/src/Controllers.f90
@@ -138,13 +138,16 @@ SUBROUTINE PitchControl(avrSWAP, CntrPar, LocalVar, objInst, DebugVar, ErrVar)
         ! Shutdown
         IF (LocalVar%SD_Trigger == 0) THEN
             LocalVar%PitCom_SD = LocalVar%PitCom
+        ! If shutdown is not triggered, PitCom_SD tracks PitCom.
         ELSE
             IF (CntrPar%SD_Method == 1) THEN    !Only SD_Method==1 supported for now 
                 DO K = 1,LocalVar%NumBl
                     LocalVar%PitCom_SD(K) = LocalVar%PitCom_SD(K) + CntrPar%SD_MaxPitchRate*LocalVar%DT
                 END DO
             ENDIF
             LocalVar%PitCom = LocalVar%PitCom_SD
+            ! When shutdown is triggered (SD_Trigger \=0), pitch to feather.
+            ! Note that in some instances (like a downwind rotor), we may want to pitch to a stall angle.
         ENDIF
 
 

diff --git a/rosco/controller/src/DISCON.F90 b/rosco/controller/src/DISCON.F90
@@ -100,7 +100,9 @@ SUBROUTINE DISCON(avrSWAP, aviFAIL, accINFILE, avcOUTNAME, avcMSG) BIND (C, NAME
         CALL UpdateZeroMQ(LocalVar, CntrPar, ErrVar)
     ENDIF
 
-    CALL Shutdown(LocalVar, CntrPar, objInst,ErrVar)
+    IF (CntrPar%SD_Mode \= 0) THEN
+        CALL Shutdown(LocalVar, CntrPar, objInst,ErrVar)
+    ENDIF
     CALL WindSpeedEstimator(LocalVar, CntrPar, objInst, PerfData, DebugVar, ErrVar)
     CALL ComputeVariablesSetpoints(CntrPar, LocalVar, objInst, DebugVar, ErrVar)
     CALL StateMachine(CntrPar, LocalVar)