Transcript Section 4.7 - Radiator X-LAT Assy IT

GLAST LAT Project
Gamma-ray Large
Area Space
Telescope
DOE/NASA Mechanical Systems Peer Review, March 27, 2003
GLAST Large Area Telescope:
Mechanical Systems Peer Review
27 March 2003
Section 4.7 Fabrication & Verification
Radiator, XLAT, Heatpipes
Brenda Costanzo
Lockheed Martin
System Engineer
[email protected]
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy
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GLAST LAT Project
DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Radiator Fabrication (1 of 2)
Obtain
Facesheet
Material
Shear
Obtain Remaining
Flight Materials
Bond Pipes
To OB
Facesheet
N/C Machine
Log Flight
Materials
Inspect
Thermal Bond
Visual
Process
Samples
To Lab
Inspect
Doublers
CMM Inspect
Geometry
Bond OB
Doublers
AC Cure
Inspect
Purchasing
Clean, Etch
& Prime
Inspection/Test
Manufacturing
Inspect
Verify Flight
Materials
Assemble
Panel and
Bond
Fit Check
Core
Inspect
Holes w/
Pins
Verify Cure
Profile
Prep and
Install Inserts
& Spools
Verify Cure
Profile
Bond Top
Edge Closure
Inspect
Inserts &
Spools
Machine
Transfer
Datums
Bond IB
Doublers
RT Cure
A
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy
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DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Radiator Fabrication (2 of 2)
A
Bond
Reservoir
Supports
Install
Reservoir
Bushings
Fit Check
Reservoir
Bushings
Inspect
Reservoir
Supports
Inspect
Bushings
Apply Blanket
Velcro
Machine
Bushings
Apply Edge
Closure Tape
Apply
Thermal
Blanket
Inspect
Bushings
Structural
Testing
Final Cosmetic
Damage
Map
Thermal
Testing
Notes
1) 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.
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy
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GLAST LAT Project
DOE/NASA Mechanical Systems Peer Review, March 27, 2003
M & 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
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy
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GLAST LAT Project
DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Overall Test Philosophy
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•
•
•
•
•
•
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
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy
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GLAST LAT Project
DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Overall Test Flow
Radiator
Acceptance
Tests
Radiator
In-Process
Tests
VCHPs
Only
Heat Pipe
In-Process
Tests
Heat Pipe
Acceptance
Tests
Integrated
Radiator & XLAT Assy
Thermal Test
X-LAT
CCHPs
Only
X-LAT
In-Process
Tests
Delivery InPlace to SLAC
TCS Thermal
Test
X-LAT Assy
Acceptance
Tests
X-LAT Plate
Qualification
Tests
Delivery to
SLAC
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy
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GLAST LAT Project
DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Heat Pipe In-Process and Acceptance
Testing
• In process testing
– Verification of material certifications
– Inspection of physical dimensions
– Verification that LM procedures are followed
• Acceptance testing
Proof
Pressure Test
Heat Transport
Test
Non-Condensable
Gas Test
Integrate into
Next Higher
Assembly
CCHP
VCHP
Reservoir Proof
Pressure Test
HP Assy Proof
Pressure Test
Heat Transport
Test
Gas Charge
Test
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy
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GLAST LAT Project
DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Radiator and X-LAT Panel In-Process
Testing
• Radiator and X-LAT Panels
– Verification of material certifications
– Inspection of physical dimensions
– Verification the LM procedures are followed
• Radiator Panels
Visual Inspection of
Pipe/Panel Bonds
Lap Shear
Test
Flatwise
Tensile Test
Insert
Pull Test
Bulk Load
Test
Radiator Assembly
Acceptance
Testing
• X-LAT Panels
– Visual inspection of pipe/panel bonds
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy
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DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Radiator Mechanical Acceptance Tests
• Test configuration
– Each radiator panel assembly tested separately
• Test flow
Vibration Testing
PreVibration IR
Signature
Low Level
Sine
Survey
Limit
Load Test
Sine
Vibration
Low Level
Sine
Survey
Acoustic
Vibration
PostVibration IR
Signature
Mass
Properties
EMI Testing
Radiated
Emissions
Conducted
Emissions
Radiated
Susceptibility
Conducted
Susceptibility
X-LAT/Radiator Assy
Thermal Testing
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy
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DOE/NASA Mechanical Systems Peer Review, March 27, 2003
X-LAT Plate Qualification Testing
• Test configuration
– One protoqual X-LAT plate assembly
• Test flow
Vibration Testing
Low Level
Sine Survey
Static
Load Test
Sine Vibration
(TBR)
Random
Vibration (TBR)
Low Level
Sine Survey
Acoustic
Vibration (TBR)
Mass
Properties
Thermal Testing
Thermal Cycle 1
Hot
Thermal
Balance
Cold
Thermal
Balance
Thermal Cycle 3
Thermal
Cycle 2
Hot
Thermal
Balance
Cold
Thermal
Cycle
Thermal
Cycle 4
Deliver to SLAC
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy 10
GLAST LAT Project
DOE/NASA Mechanical Systems Peer Review, March 27, 2003
X-LAT Assy Mechanical Acceptance Tests
• Test configuration
– X-LAT Assy (two X-LAT panels and one mid-plate)
• Test flow
Vibration Testing
Pre-Vibration
IR Signature
Random
Vibration (TBR)
Low Level
Sine Survey
Static
Load Test
Sine Vibration
(TBR)
Acoustic
Vibration (TBR)
Low Level
Sine Survey
Post-Vibration
IR Signature
Mass
Properties
X-LAT/Radiator Assy
Thermal Testing
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy 11
GLAST LAT Project
DOE/NASA Mechanical Systems Peer Review, March 27, 2003
X-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”
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy 12
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DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Test Orientation
NO SCALE
Flight
Radiators (2)
Heater Plate
Flight X-LAT
Assy
Flight
X-LAT Assy
Flight
Radiators
(2)
MLI
Blanket
Cold
Wall
+Z
+Y
Gravity is
Into the
Page
+X
MLI
Blanket
Cold
Wall
+Y
Gravity is
Down
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy 13
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X-LAT/Radiator Assy Thermal Test Flow
Pump Down
Chamber
Pre-Cycling
Functional Test
Thermal Cycle 1
Bakeout / Hot
Survival
Hot Temperature
Turn-On
Cold
Survival
Cold Temperature
Turn-On
Thermal Cycle 3
Thermal
Cycle 2
Hot Balance
Point
Cold Balance
Point
Thermal Cycle 4
Hot Balance
Point
Cold Portion of
Thermal Cycle
Post-Cycling
Functional Test
Delivery InPlace to SLAC
IR
Signature
TCS Thermal
Testing
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy 14
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DOE/NASA Mechanical Systems Peer Review, March 27, 2003
TCS Thermal Testing
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Hardware Configuration
– Radiator Assy
– X-LAT Assy
– Downspout heat pipes (TBR)
– LAT mass simulator
Test Objective
– Verify VCHP reservoir heater operational algorithm
Test Flow
Pump Down
Chamber
Pre-Cycling
Functional Test
Hot Balance
Point
Cold Balance
Point
Bakeout /
Hot Survival
Cold Temperature
Turn-Off
Hot Balance
Point
Hot Temperature
Turn-On
Cold
Survival
Post-Cycling
Functional Test
Cold Temperature
Turn-On
Repressurize
Chamber
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy 15
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DOE/NASA Mechanical Systems Peer Review, March 27, 2003
Further 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
Section 4.7 - Mechanical Systems Radiator and X-LAT Assy 16