GLAST LAT ProjectDOE/NASA Mechanical Systems Peer Review, March 27, 2003 Section 4.7 - Mechanical...
-
date post
20-Dec-2015 -
Category
Documents
-
view
216 -
download
3
Transcript of GLAST LAT ProjectDOE/NASA Mechanical Systems Peer Review, March 27, 2003 Section 4.7 - Mechanical...
GLAST LAT Project DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy 1
GLAST Large Area Telescope:GLAST Large Area Telescope:
Mechanical Systems Peer Review27 March 2003Section 4.7 Fabrication & Verification
Radiator, XLAT, Heatpipes
Brenda CostanzoLockheed MartinSystem Engineer
Gamma-ray Large Gamma-ray Large Area Space Area Space TelescopeTelescope
GLAST LAT Project DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy 2
Radiator Fabrication (1 of 2)Radiator Fabrication (1 of 2)
ObtainFacesheetMaterial
Shear N/C Machine InspectClean, Etch
& Prime
Bond PipesTo OB
Facesheet
Inspect Thermal Bond
Visual
Fit CheckCore
MachineTransferDatums
Assemble Panel and
Bond
Verify CureProfile
ProcessSamplesTo Lab
CMM InspectGeometry
InspectHoles w/
Pins
Prep and Install Inserts
& Spools
InspectInserts &Spools
Bond IB DoublersRT Cure
Bond OBDoublersAC Cure
Verify CureProfile
InspectDoublers
Bond TopEdge Closure
Obtain Remaining Flight Materials
Inspect Verify Flight
Materials
Log Flight Materials
A
Inspection/Test
Manufacturing
Purchasing
GLAST LAT Project DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy 3
Radiator Fabrication (2 of 2)Radiator Fabrication (2 of 2)
Notes1) All panel moves require: inspection documentation of panel for damage; packaging for
transport; and flight approved move procedures. 2) No outside storage.3) Qualified flight transportation personnel and equipment.
Apply EdgeClosure Tape
InspectBushings
InstallReservoirBushings
StructuralTesting
ApplyThermalBlanket
Apply BlanketVelcro
Final CosmeticDamage
Map
ThermalTesting
InspectBushings
Fit CheckReservoirBushings
InspectReservoirSupports
BondReservoirSupports
MachineBushingsA
GLAST LAT Project DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy 4
M & P Plan, EEE PartsM & P Plan, EEE Parts
• M & P Plan submitted to SLAC (GLS00018-2, dated 1 Feb 2003)• EEE Parts
– Heaters: Minco Kapton Foil Heaters per GSFC S-311-P-079– Thermistors: YSI Thermistors per GSFC S-311-P-18– RTDs: Rosemount PRT per GSFC S-311– Solid State Thermostats: Micropac 52372”O”
• Submitted to SLAC for approval Nov 2002
GLAST LAT Project DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy 5
Overall Test PhilosophyOverall Test Philosophy
• Tests are broken into three categories
– In process
– Assembly
– Joint assembly
• Benchmark tests will be performed to assess any changes due to environmental testing
– IR Heat pipe signature
– Low level sine vibration
• Test plan is document GLS0002-03
• All testing will have procedures written prior to commencement
• Inspection occurs throughout the testing at points specified in the procedure
• Flash reports will be written within 3 working days of test completion
• Full reports will be written within 30 days of test completion or by pre-ship review, whichever is earlier
GLAST LAT Project DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy 6
Overall Test FlowOverall Test Flow
Heat Pipe In-Process
Tests
X-LAT Assy Acceptance
Tests
Integrated Radiator & X-
LAT Assy Thermal Test
Delivery In-Place to SLAC
Heat Pipe Acceptance
Tests
X-LAT In-Process
Tests
VCHPs Only
X-LAT CCHPs Only
Radiator Acceptance
Tests
Radiator In-Process
Tests
TCS Thermal Test
X-LAT Plate Qualification
Tests
Delivery to SLAC
GLAST LAT Project DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy 7
Heat Pipe In-Process and Acceptance Heat Pipe In-Process and Acceptance TestingTesting
• In process testing– Verification of material certifications– Inspection of physical dimensions– Verification that LM procedures are followed
• Acceptance testing
CCHP
VCHP
Integrate into Next Higher Assembly
Heat Transport Test
Non-Condensable Gas Test
Proof Pressure Test
HP Assy Proof Pressure Test
Heat Transport Test
Reservoir Proof Pressure Test
Gas Charge Test
GLAST LAT Project DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy 8
Radiator and X-LAT Panel In-Process Radiator and X-LAT Panel In-Process TestingTesting
• Radiator and X-LAT Panels– Verification of material certifications– Inspection of physical dimensions– Verification the LM procedures are followed
• Radiator Panels
• X-LAT Panels– Visual inspection of pipe/panel bonds
Flatwise Tensile Test
Visual Inspection of Pipe/Panel Bonds
Lap Shear Test
Bulk Load Test
Insert Pull Test
Radiator Assembly Acceptance
Testing
GLAST LAT Project DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy 9
Radiator Mechanical Acceptance TestsRadiator Mechanical Acceptance Tests
• Test configuration– Each radiator panel assembly tested separately
• Test flowVibration Testing
Pre-Vibration IR
Signature
Low Level Sine
Survey
Sine Vibration
Limit Load Test
Acoustic Vibration
Post-Vibration IR
Signature
Low Level Sine
Survey
Mass Properties
X-LAT/Radiator Assy Thermal Testing
Radiated Emissions
Conducted Emissions
Radiated Susceptibility
Conducted Susceptibility
EMI Testing
GLAST LAT Project DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy 10
X-LAT Plate Qualification TestingX-LAT Plate Qualification Testing
• Test configuration– One protoqual X-LAT plate assembly
• Test flow
Mass Properties
Deliver to SLAC
Vibration Testing
Low Level Sine Survey
Sine Vibration (TBR)
Static Load Test
Acoustic Vibration (TBR)
Low Level Sine Survey
Random Vibration (TBR)
Thermal Cycle 2
Hot Thermal Balance
Cold Thermal Balance
Thermal Cycle 4
Cold Thermal
Cycle
Hot Thermal Balance
Thermal Cycle 1 Thermal Cycle 3
Thermal Testing
GLAST LAT Project DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy 11
X-LAT Assy Mechanical Acceptance TestsX-LAT Assy Mechanical Acceptance Tests
• Test configuration– X-LAT Assy (two X-LAT panels and one mid-plate)
• Test flow
Pre-Vibration IR Signature
Low Level Sine Survey
Vibration Testing
Sine Vibration (TBR)
Static Load Test
Acoustic Vibration (TBR)
Post-Vibration IR Signature
Low Level Sine Survey
Mass Properties
X-LAT/Radiator Assy Thermal Testing
Random Vibration (TBR)
GLAST LAT Project DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy 12
X-LAT/Radiator Assy Thermal TestingX-LAT/Radiator Assy Thermal Testing
• Combining the X-LAT and Radiator Assy thermal testing– Cost savings (1 test versus 2 tests)– Minimizes STE– Tests X-LAT pipe to Radiator pipe thermal joint
• Hardware configuration– X-LAT Assy– Radiator Assy– Heater plate to introduce heat into the system– Lab electronics to control VCHPs
• Hardware orientation– +X side up– Level within 0.10”
GLAST LAT Project DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy 13
Test OrientationTest Orientation
+Z
+Y
Gravity isInto the
Page
Cold Wall
MLI Blanket
Flight Radiators
(2)
+X
+Y
Gravity isDown
Flight X-LAT Assy
Cold Wall
Flight Radiators (2)
MLI Blanket
NO SCALE
Flight X-LATAssy
Heater Plate
GLAST LAT Project DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy 14
X-LAT/Radiator Assy Thermal Test FlowX-LAT/Radiator Assy Thermal Test Flow
Pre-Cycling Functional Test
Pump Down Chamber
Thermal Cycle 1
Bakeout / Hot Survival
Hot Temperature Turn-On
Cold Survival
Cold Temperature Turn-On
Thermal Cycle 3
Cold Balance Point
Thermal Cycle 2
Hot Balance Point
Thermal Cycle 4
Hot Balance Point
Cold Portion of Thermal Cycle
Post-Cycling Functional Test
Delivery In-Place to SLAC
TCS Thermal Testing
IR Signature
GLAST LAT Project DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy 15
TCS Thermal TestingTCS Thermal Testing
• Hardware Configuration– Radiator Assy– X-LAT Assy– Downspout heat pipes (TBR)– LAT mass simulator
• Test Objective– Verify VCHP reservoir heater operational algorithm
• Test Flow
Bakeout / Hot Survival
Hot Temperature Turn-On
Pre-Cycling Functional Test
Pump Down Chamber
Cold Balance Point
Hot Balance Point
Post-Cycling Functional Test
Cold Survival
Cold Temperature Turn-On
Hot Balance Point
Cold Temperature Turn-Off
Repressurize Chamber
GLAST LAT Project DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy 16
Further WorkFurther Work
• Determine appropriate structural testing for Radiator and X-LAT Assemblies
• Determine X-LAT Assy and Radiator Assy configuration for thermal testing (together or separate)– Design STE (Special Test Equipment) and GSE (Ground
Support Equipment)• Determine if TCS thermal test objective can be achieved during
XLAT / Radiator Assy thermal test– Determine what additional hardware will be available– If performing separate TCS test, design LAT mass
simulator• Write test procedures