Space Shuttle Ultra development thread

DaveS said:
And a better way to demonstrate the "twang" is to implement a proper T-10 to T0 behaviour of the RSLS(which is Redundant Set Launch Sequencer, not Redundant Sequencer Launch Sequencer) and GLS which is to cut-off the main engines if something is not right and is violating preset criteria.

This leads to alot of "twangs", rocking back and forth for a while until the motion has subsided. Just a tree-second long firing of the SSMEs produces a "twang" motion that lasts for over 5 minutes.
Click to expand...

You mean a more or less simple damped oscillation? I think we can solve this numerically with a RK4, maybe we can use such a code sequence also for other animations.
 
Urwumpe said:
You mean a more or less simple damped oscillation?
Click to expand...
Yes. In the event of an RSLS abort, the "twang" doesn't just die of one full cycle(one north and one south bending), it in fact continues on for a while.

I'm in the process of researching the actual positions of these water deluge nozzles. The side nozzles seems to mounted in sets of 5 nozzles right next to the SSME blastsheild.
 
DaveS said:
Yes. In the event of an RSLS abort, the "twang" doesn't just die of one full cycle(one north and one south bending), it in fact continues on for a while.

I'm in the process of researching the actual positions of these water deluge nozzles. The side nozzles seems to mounted in sets of 5 nozzles right next to the SSME blastsheild.
Click to expand...

Yeah, makes sense, I think the Shuttle experiences already such movement from wind pressure.

One re-use of such a damped oscillation code would be developing a ragdoll physics model of an astronaut in his seat, which we could use for implementing camera shake... so the bugs in relation with CamShakeMFD are solved.
 
Here's a screengrab of the water deluge activated following the RSLS aboirt for STS-55 on March 22 1993. Orbiter was Columbia as the SILTS modification on the stabilizer shows.

View is from camera 071 viewing the aft and after the smoke of SSME ignition had moved out of the camera's FOV.
 

Attachments

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Looks like a rather complex shape for particle streams, any idea how to improve this? Or do we want to have more gas like effects?
 
Urwumpe said:
Looks like a rather complex shape for particle streams, any idea how to improve this? Or do we want to have more gas like effects?
Click to expand...
Well, I think we could achieve this "jet" stream like appearance with a custom PSTREAM texture. But for initial tests, I think we could accept a gaseous appearance.
 
I've checked in the first version of the OMS gimbaling. The gimballing itself works well, but the trim angles required are incorrect. For a single engine burn with an empty payload bay, SSU currently requires trim angles of P=-0.4, Y=4.5, whereas the real shuttle uses angles of P=0.0, Y=5.2. The other problem is that the TVC autopilot works well only if the initial trim position goes through the CG. I'll fix this once the trim angles are fixed.
 
Twang looks very cool Kwan.
 
Problem:
Manual RHC inputs doesn't work anymore. Moding the DAP has no effect.
 
DaveS: Is this for OMS burns or during normal operations? I haven't worked on using the OMS TVC for manual control, but the normal RCS DAP should still work.
 
SiameseCat said:
DaveS: Is this for OMS burns or during normal operations? I haven't worked on using the OMS TVC for manual control, but the normal RCS DAP should still work.
Click to expand...
Normal ops. Also it seems like saving and loading of DAP settings doesn't work anymore either. Can't mode over to PRI jets. AUTO DAP can use PRI jets but manual RHC inputs only results in VERN jets being used.
 
Scratch pad line on CRT seems to be filling up. Launch, then go to ops 105 and push buttons and enter items to set up OMS 2 maneuver. Scratch pad line will fill up (not clear on the next OPS or ITEM) and eventually you get a CTD.

This is relatively new.
 
SiameseCat said:
DAP seems to be working for me. What exactly are you doing?
Click to expand...
OK, seems to have been a glitch of some sort but the saving/loading problem still remains. Exited a scenario with the DAP in LVLH. Re-entered it and DAP was in AUTO, not LVLH.
 
Can't reproduce this one either. Can you post the saved scenario here?
 
Here you go:

Code: 
BEGIN_DESC
STS-126/ISS ULF2 mission: EOM-1 day Flight Control System Check-Out(FCS C/O). For this procedure start up APU-2 and run 3 cycles(one cycle is 1 down and 1 up) of each aerosurface(elevons, rudder/speedbrake and the bodyflap). Once the aerosurface checks have been completed, you can shut down APU-2 and proceed to the RCS Hot-Fire test to check out all 38 Primary RCS Jets for entry.
END_DESC
 
BEGIN_ENVIRONMENT
  System Sol
  Date MJD 54799.6672939769
  Context SSU
END_ENVIRONMENT
 
BEGIN_FOCUS
  Ship Endeavour
END_FOCUS
 
BEGIN_CAMERA
  TARGET Endeavour
  MODE Extern
  POS 2.28 -89.86 -35.58
  TRACKMODE TargetRelative
  FOV 40.00
END_CAMERA
 
BEGIN_HUD
  TYPE Orbit
  REF AUTO
END_HUD

BEGIN_SHIPS
ISS:ProjectAlpha_ISS
  STATUS Orbiting Earth
  RPOS -3672456.32 247887.02 -5634727.02
  RVEL 3108.490 6827.910 -1719.982
  AROT -31.75 -71.26 -79.57
  VROT 0.14 0.04 0.00
  PRPLEVEL 0:1.000
  IDS 0:1 100 1:2 100 2:3 100 3:4 100 4:5 100
  NAVFREQ 0 0
  XPDR 466
END
Endeavour:SpaceShuttleUltra
  STATUS Orbiting Earth
  RPOS -3435194.08 733509.61 -5731580.90
  RVEL 3442.988 6787.930 -1189.875
  AROT -80.37 26.84 -145.30
  VROT 0.07 -0.00 -0.00
  PRPLEVEL 0:0.658 1:0.785 2:0.784 3:0.783 4:0.884 5:0.884 6:0.640 7:0.999 8:0.999 9:0.999
  NAVFREQ 0 0
  CONFIGURATION 3
  ODS
  MET 31609.626
  WING_NAME Endeavour
  GEAR 0 0.0000
  MPM
  STBD_MPM 1 1.0000
  RMS
  ARM_STATUS 0.500000 0.184020 0.167888 0.479085 0.500000 0.500000
  ROLLOUT 1 1.000000
  SHOULDER_BRACE 0.000
  MRL 0.000000 1.000000
  GRAPPLE 1 1.0000
  RIGIDIZE 1 1.0000
  EXTEND 1 1.0000
  SAT_OFS_X 0.000
  SAT_OFS_Y 0.000
  SAT_OFS_Z 0.000
  OPS 202
  PEG7 0.000 0.000 0.000
  WT 0.000
  TIG 0 0 0 0.0
  TGT_ID 2
  BODY_VECT 1
  ROLL 0.000
  PITCH 0.000
  YAW 0.000
  P_ANGLE 0.000
  Y_ANGLE 0.000
  OM_ANGLE -1.000
  DAP MODE 0 0
  ROT MODE 0 0 0
  TRANS MODE 0 0 0
  CONTROL MODE 2
   PAYLOAD CACTIVE1 0.000000 0.000000 2
   PAYLOAD CACTIVE2 0.000000 0.000000 0
   PAYLOAD CACTIVE3 -8.000000 0.000000 0
   PAYLOAD CPASSIVE1 4.000000 0.000000 0
   PAYLOAD CPASSIVE2 2.000000 0.000000 0
   PAYLOAD CPASSIVE3 -6.000000 0.000000 0
   PAYLOAD CPASSIVE4 7.000000 0.000000 0
   PAYLOAD PORT1 3.000000 0.000000 0
   PAYLOAD PORT2 -2.000000 0.000000 0
   PAYLOAD PORT3 -8.000000 0.000000 0
   PAYLOAD PORT4 7.000000 0.000000 0
   PAYLOAD STBD1 3.000000 0.000000 0
   PAYLOAD STBD2 -2.000000 0.000000 0
   PAYLOAD STBD3 -8.000000 0.000000 0
   PAYLOAD STBD4 0.000000 0.000000 0
  CARGODOOR 1 1.0000
  KUBAND 1 1.0000
  BAYDOORLATCH0 1 1.0000
  BAYDOORLATCH1 1 1.0000
  BAYDOORLATCH2 1 1.0000
  BAYDOORLATCH3 1 1.0000
  SWITCH_MPM_DPLY 1 1 1 1
  SWITCH_RMS_POWER 1 1
  SWITCH_RMS_RET_LATCH 1 1
  EE MODE 1
  CRT_SEL 1 1
  LPROBEARM 1
  LPROBE 2
  RPROBEARM 1
  RPROBE 2
  LOMS 2
  ROMS 2
  BOILERN2SPLY0 1
  BOILERN2SPLY1 1
  BOILERN2SPLY2 1
  BOILERCNTLR0 1
  BOILERCNTLR1 1
  BOILERCNTLR2 1
  BOILERHTR0 1
  BOILERHTR1 1
  BOILERHTR2 1
  APUFUTKVLV0 1
  APUFUTKVLV1 1
  APUFUTKVLV2 1
  APUCNTLRPWR0 1
  APUCNTLRPWR1 1
  APUCNTLRPWR2 1
  HYDCIRCPUMP0 1
  HYDCIRCPUMP1 1
  HYDCIRCPUMP2 1
  APUAUTOSHTDN 1
  APUSPDSEL0 1
  APUSPDSEL1 1
  APUSPDSEL2 1
  APUCNTRL0 1
  APUCNTRL1 1
  APUCNTRL2 1
  HYDMNPMPPRESS0 1
  HYDMNPMPPRESS1 1
  HYDMNPMPPRESS2 1
  MPSENGPWR00 1
  MPSENGPWR01 1
  MPSENGPWR02 1
  MPSENGPWR10 1
  MPSENGPWR11 1
  MPSENGPWR12 1
  HEISOLA0 2
  HEISOLA1 2
  HEISOLA2 2
  HEISOLB0 2
  HEISOLB1 2
  HEISOLB2 2
  MPS0 1
  MPS1 1
  MPS2 1
  L_ET_UMB_DOOR 0.000
  R_ET_UMB_DOOR 0.000
  ET_DOOR_LATCHES 1.000000 0.000000 0.000000
  @PANEL F2
  @ENDPANEL 
  @PANEL F4
  @ENDPANEL 
  @PANEL F6
  @ENDPANEL 
  @PANEL F7
  @ENDPANEL 
  @PANEL F8
  @ENDPANEL 
  @PANEL O6
  "L GLRSHLD FLOOD" OFF
  "S TRK DR CNTL SYS1" CLOSE
  "S TRK DR CNTL SYS2" CLOSE
  @ENDPANEL 
  @PANEL R11
  @ENDPANEL 
  @PANEL A6
  "SENSE" [0]
  @ENDPANEL 
  @PANEL AftMDU
  @ENDPANEL 
  @PANEL A7A3/A8A3
  "SYSTEM POWER MNA" [0]
  "SYSTEM POWER MNB" [0]
  "PYRO POWER MNA" [0]
  "PYRO POWER MNC" [0]
  "SYS1 VENT ISOL" [0]
  "SYS1 VENT" [0]
  "SYS2 VENT ISOL" [0]
  "SYS2 VENT" [0]
  "PSU POWER MNA" [0]
  "PSU POWER MNB" [0]
  "LIGHTS AIRLOCK 1-4" [0]
  "LIGHTS AIRLOCK 2-3" [0]
  "LIGHTS DOCKING TRUSS FWD" [0]
  "LIGHTS DOCKING TRUSS AFT" [0]
  "ARLK/TNL FAN A" [0]
  "ARLK/TNL FAN B" [0]
  "LIGHTS C/L VESTIBULE PORT" [0]
  "LIGHTS C/L VESTIBULE STBD" [0]
  "CNTL PNL PWR A" OFF
  "CNTL PNL PWR B" OFF
  "CNTL PNL PWR C" OFF
  "HTRS/DCU PWR H1" OFF
  "HTRS/DCU PWR H2/DCU" OFF
  "HTRS/DCU PWR H3/DCU" OFF
  "APDS PWR A" OFF
  "APDS PWR B" OFF
  "APDS PWR C" OFF
  "PYROS Ap" [0]
  "PYROS Bp" [0]
  "PYROS Cp" [0]
  @ENDPANEL 
  MTU_MET_RUNNING 1
  MTU_MET0 112674.418
  MTU_MET1 112674.574
  MTU_MET2 0.000
   EVENT_TIMER0 0.000000 DOWN STOPPED
   EVENT_TIMER1 0.000000 DOWN STOPPED
  IDP1 SPEC 0
  IDP1 DISP 0
  IDP2 SPEC 0
  IDP2 DISP 0
  IDP3 SPEC 0
  IDP3 DISP 0
  IDP4 SPEC 0
  IDP4 DISP 0
  LEFT_AIRDATAPROBE 1 3 0.000000
  RIGHT_AIRDATAPROBE 1 3 0.000000
  APU1_State 0
  APU1_FuelPress 0.000
  APU1_HydPress 0.000
  APU1_Speed 0.000
  APU2_State 0
  APU2_FuelPress 0.000
  APU2_HydPress 0.000
  APU2_Speed 0.000
  APU3_State 0
  APU3_FuelPress 0.000
  APU3_HydPress 0.000
  APU3_Speed 0.000
END
Ultra_OBSS:SpacecraftSpacecraft3
  STATUS Orbiting Earth
  RPOS -3435197.96 733509.81 -5731580.94
  RVEL 3442.988 6787.930 -1189.875
  AROT -80.37 26.84 -145.30
  VROT 0.07 -0.00 -0.00
  ATTACHED 0:1,Endeavour
  NAVFREQ 0 0
  RCS 1
  CTRL_SURFACE 1
  CONFIGURATION 1
  CURRENT_PAYLOAD 0
END
END_SHIPS
 
BEGIN_Attachment Manager
END
 
BEGIN_ExtMFD
END
Attitude is supposed to be heads-up wings-level retrograde. For me the orbiter begins manuevering as soon as the scenario starts and the DAP mode is supposed to be LVLH, PRI jets, DISC RATE all axes and NORM all axes.
 
Scenario works fine for me. I think this bug might be due to compiler differences.


-----Post Added-----


Try the latest version; I've changed the code for loading the DAP mode.
 
SiameseCat said:
Scenario works fine for me. I think this bug might be due to compiler differences.


-----Post Added-----


Try the latest version; I've changed the code for loading the DAP mode.
Click to expand...
OK, that fixed it! Thanks! I wonder why this bug decided to show up now? Haven't had any problems with the DAP until now. Worked nicely all the time.
 
Glad to know it works. I'm not sure why this problem suddenly came up; as far as I can tell, the old code should have worked fine.
 
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