GLAST LAT Project
Gamma-ray Large
Area Space
Telescope
Integration and Test CDR Peer Review, March 28, 2003
GLAST Large Area Telescope:
I & T Peer Review
I&T Test Plans
Brian Grist
SU-SLAC
Subsystem Engineer
bgrist@slac.stanford.edu
650-926-2998
Document: LAT-PR-01779-01
Section 5 - Page 1
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
Outline
•
•
•
•
Test flow
Plan Overview
Readiness Reviews
Test Plans (Sequence, Plan Flow, Requirements-From
Mechanical Systems, Facilities)
– Comprehensive/Limited Performance
• Redundancy Verification
– Survey
– Mass Properties
– Modal
– EMI/EMC
– Sine Vibration
– Acoustic
– TBAL/TVAC
– Airplane Test (TBR)
Document: LAT-PR-01779-01
Section 5 - Page 2
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
Integration and Test Flow
Tower
Integration
TKR
CAL
Grid
TEM/TPS
LAT
Integration
Integrate
TKR/CAL&
TEM'swith
Grid
E
A
O
Environmental Tests
F
L
L
C
Survey
E
EP
Observatory
Integration
LAT Test
A Integrate
F
Thermal
Balance
EMI/EMC
M Survey
E-Boxes
w/ Grid
Thermal Vac
C
M
L
SIU
Delivery
L Sine Vibe
PDU
Mass
Properties
O Survey
GASU.
Htr Box
ACD
Survey
C
Integrate EMI
Skirt, Htr Switch
Boxes
EMI SHIELD
M
L
Modal
survey
Install
Radiators
FinalMass
Properties
Observatory
Integration
M
L
Acoustic
Integrate ACD
C
Integrate X-LAT
X-LAT Plate
L
Pre-Ship
Survey
O Survey
Radiator FitCHeck
Radiators
E
Electrical
InterfaceTests
C
A
Aliveness
Tests
F
Ship to
SA
Functional
Tests
Survey:
M
O
L
Optical
M
Limited
Performance
C
Comprehensive
Performance
Muon
v CDR 3/14/03
Document: LAT-PR-01779-01
Section 5 - Page 3
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
Test Plan Directive
LAT Instrument Performance
Verification Plan
LAT-MD-00408
T. Leisgang
Subsystem Test
Plans
Tracker Tower Test
Plan
LAT-TD-00155
Calorimeter Test
Plan
LAT-SS-00262
ACD Test Plan
LAT
Performance &
Operation Test
Plans
Component
Aliveness Tests
M-GSE
E. Gawehn LAT-MD-01462
Subsystem
Integration Tests
E-GSE
LAT-MD-01533
M. Huffer
R. Claus
LAT Limited
Performance
Tests
LAT
Comprehensive
Performance
Tests
LAT Operational
Performance Tests
Electronics Test
Plan
LAT-TD-00296
SUI
TEM
EP
PDU
GASU
L. Wai
LAT Handling
&Transportation Plan
LAT-MD-00452
LAT-MD-00649
LAT Contamination Control
LAT-MD-00404
Plan
J. Cullinan
E. Gawehn
LAT Instrumentation Plan
LAT-MD-00890
M. Lovellette
W. Davis
Facilities
LAT-MD-01386
LAT Survey & Alignment
L. Wai
LAT-MD-01586
LAT Survey Plan
LAT-TD-00895
L. Wai
M. Nordby
Mechanical Weight & CG
LAT-MD-01598
E. Gawehn
L. Wai
Dynamics Tests
LAT-MD-01836
E. Gawehn
M. Lovellette
Mechanical S/S
Test Plan
LAT-SS-00493
LAT Flight Software
Test Plan
LAT-TD-00786
LAT Mechanical Integration
LAT-PS-00676
E. Gawehn
L. Wai
ACD-PLAN-000050
Thermal S/S Test
Plan
No Number
LAT Integration & Test Plan
LAT-MD-01376
E. Bloom
LAT Dynamics Test Plan
LAT-MD-01196
Y Ismael
M. Lovellette
Electrical Performance Tests
LAT-MD-01055
L. Wai
Thermal Tests
LAT-MD-01837
E. Gawehn
M. Lovellette
LAT Thermal Test Plan
LAT-MD-01600
M. Lovellette
J. Wang
LAT EMI Tests
LAT-MD-01838
LAT EMI/EMC Test Plan
No Number
M. Lovellette
T. Leisgang
M. Lovellette
LAT SVAC Test Plan
LAT-MD-01587
E. do Couto E Silva
SVAC Plan
LAT-MD-00446
E. Do Couto E Silva
S. Ritz
Particle Test Plan
LAT-MD-00440
G. Godfrey
Document: LAT-PR-01779-01
Section 5 - Page 4
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
Reviews
•
Test Readiness Review- LAT-MD-00408 LAT Instrument Performance Verification Plan
– A test readiness review will be conducted prior to commencing a flight level test
program as required in the Systems Engineering Management plan, LAT-MD-00066.
This review will be imposed upon all subsystem and system level qualification and
flight level test programs. Topics to be addressed at the review are:
• Changes since CDR
• Test Requirements
• Planned tests
• Test Entry / Exit Criteria
• Test facilities
• Equipment calibration
• Test configurations
• Test procedure status
• Staffing plans
• System performance review
• Quality program review
• Problem / failure reports
• Risk assessment
• System safety
• Test schedule
• Issues and concerns
Document: LAT-PR-01779-01
Section 5 - Page 5
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
Comprehensive and Limited Performance Tests
•
The system level Performance tests
requirements flow from the
subsystems and system
engineering.
The Integration and Test plan to
implement the Electrical
Performance test is LAT-MD-01055.
•
CAL
Grid
TEM/TPS
LAT
Integration
Subsystem Test
Plans
Tracker Tower Test
Plan
LAT-TD-00155
Environmental Tests
F
C
E
F
A Integrate
E-Boxes
w/ Grid
Calorimeter Test
Plan
LAT-SS-00262
ACD Test Plan
LAT
Performance &
Operation Test
Plans
L
Thermal S/S Test
Plan
No Number
Thermal
Balance
Thermal Vac
C
M
L
SIU
Subsystem
Integration Tests
E-GSE
LAT-MD-01533
M. Huffer
R. Claus
LAT Limited
Performance
Tests
LAT
Comprehensive
Performance
Tests
Mass
Properties
O Survey
GASU.
Htr Box
ACD
LAT Operational
Performance Tests
Survey
LAT Flight Software
Test Plan
LAT-TD-00786
L
C
Integrate EMI
Skirt, Htr Switch
Boxes
EMI SHIELD
M
Modal
survey
Install
Radiators
FinalMass
Properties
Observatory
Integration
M
L
Acoustic
Integrate ACD
Electronics Test
Plan
LAT-TD-00296
SUI
TEM
EP
PDU
L. Wai
LAT Instrumentation Plan
LAT-MD-00890
M. Lovellette
W. Davis
Facilities
LAT-MD-01386
LAT Survey & Alignment
L. Wai
LAT-MD-01586
LAT Survey Plan
LAT-TD-00895
L. Wai
M. Nordby
Mechanical Weight & CG
LAT-MD-01598
E. Gawehn
L. Wai
LAT Dynamics Test Plan
LAT-MD-01196
Y Ismael
M. Lovellette
Dynamics Tests
LAT-MD-01836
E. Gawehn
M. Lovellette
L Sine Vibe
PDU
LAT Contamination Control
LAT-MD-00404
Plan
J. Cullinan
E. Gawehn
M-GSE
E. Gawehn LAT-MD-01462
Mechanical S/S
Test Plan
LAT-SS-00493
Delivery
LAT Mechanical Integration
LAT-PS-00676
E. Gawehn
Component
Aliveness Tests
EMI/EMC
M Survey
LAT Handling
&Transportation Plan
LAT-MD-00452
LAT-MD-00649
LAT Integration & Test Plan
LAT-MD-01376
E. Bloom
L. Wai
ACD-PLAN-000050
L
Survey
EP
Observatory
Integration
LAT Test
Integrate
TKR/CAL&
TEM'swith
Grid
E
A
O
T. Leisgang
Integration and Test Flow
Tower
Integration
TKR
LAT Instrument Performance
Verification Plan
LAT-MD-00408
Electrical Performance Tests
LAT-MD-01055
L. Wai
Thermal Tests
LAT-MD-01837
E. Gawehn
M. Lovellette
LAT Thermal Test Plan
LAT-MD-01600
M. Lovellette
J. Wang
LAT EMI Tests
LAT-MD-01838
LAT EMI/EMC Test Plan
No Number
M. Lovellette
T. Leisgang
M. Lovellette
C
Integrate X-LAT
X-LAT Plate
L
E
Electrical
InterfaceTests
C
Radiator FitCHeck
Radiators
A
Aliveness
Tests
F
SVAC Plan
LAT-MD-00446
E. Do Couto E Silva
S. Ritz
Particle Test Plan
LAT-MD-00440
G. Godfrey
M
Ship to
SA
Functional
Tests
Survey:
GASU
Pre-Ship
Survey
O Survey
LAT SVAC Test Plan
LAT-MD-01587
E. do Couto E Silva
O
L
Optical
M
Limited
Performance
C
Comprehensive
Performance
Test Plan Flow
Muon
v CDR 3/14/03
Document: LAT-PR-01779-01
Section 5 - Page 6
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
Comprehensive and Limited Performance Tests
•
Comprehensive and Limited Performance Tests- LAT-MD-00408 LAT Instrument
Performance Verification Plan
– Comprehensive performance tests will be developed for use in support of
LAT testing. LAT CPT testing will demonstrate the operation of all primary
and redundant circuitry and paths for all operational modes.
– Parameters will be varied over their specification ranges to insure that the
unit performs as designed.
– These tests will be performed to provide baseline data for each level of
assembly.
– A CPT will also be conducted during the hot and cold extremes of the
temperature test or the thermal-vacuum test and at the conclusion of the
environmental test sequence as well as at other times as needed in the
verification procedures.
– The LAT CPT will demonstrate that the hardware and software meet their
performance requirements.
– The CPT will also demonstrate that the instrument produces the expected
responses. At lower levels of assembly, the test will demonstrate that,
when provided with appropriate inputs, internal performance is
satisfactory and outputs are within acceptable limits.
– Limited Performance tests will be a subset of the CPT and will be
performed before during and after environmental tests as appropriate
Document: LAT-PR-01779-01
Section 5 - Page 7
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
Comprehensive and Limited Performance Tests
Test Name
Type
Power
S/C Interface
Test Point
LPT
Power-Up/Boot

1553 Bus Interface
1553 Bus



SC Command Interface
LAT Commanding



Housekeeping Data
Telemetry



Science Data Collection
Telemetry


GPS Time and GRB Alert
Timing


CPU-to-CPU Communication
FSW Internal




Configuration and Read back
FSW Internal




LAT Environmental Sensors
FSW Internal




Front End Strobe
FSW Internal




Front End Charge Scan
FSW Internal



TKR Cosmic Ray Trigger
I&T



CAL Cosmic Ray Trigger
I&T



ACD Cosmic Ray Trigger
I&T



High Rate Trigger
I&T



Event Filtering
FSW Internal



LAT Pointing Calculation
FSW Internal


Pointing Request Handling
SC Commanding


Mode Operations
LAT Commanding


Diagnostics and Calibration
FSW Internal


Thermal Control System
Thermal Control


LAT Initialization



Source: LAT Electrical Performance Test Plan (LAT-MD-01055) Draft
Document: LAT-PR-01779-01
Section 5 - Page 8
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
Redundancy Testing
•
•
•
A sequence of online “schema” (configurations) will be defined which
mask out individual or combinations of Front Ends, Readout
Controllers, Cable Controllers, TEMs.
The tests will consist of looping through the schema and taking test
data to validate the redundant electrical paths.
LAT Electrical Performance Test Plan (LAT-MD-01055) details the
redundant path testing.
Document: LAT-PR-01779-01
Section 5 - Page 9
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
Survey Plan
•
The system level survey
requirements are defined in LATTD-00895.
The Integration and Test plan to
implement the survey program
is LAT-MD-01586.
•
LAT Instrument Performance
Verification Plan
LAT-MD-00408
T. Leisgang
Subsystem Test
Plans
Tracker Tower Test
Plan
LAT-TD-00155
Integration and Test Flow w/ surveys in red
Tower
Integration
TKR
CAL
Grid
TEM/TPS
LAT
Integration
LAT Test
Integrate
TKR/CAL&
TEM'swith
Grid
E
A
O
Environmental Tests
F
C
E
F
A Integrate
E-Boxes
w/ Grid
Calorimeter Test
Plan
LAT-SS-00262
ACD Test Plan
L
Thermal S/S Test
Plan
No Number
Thermal
Balance
Thermal Vac
C
M
L
SIU
Subsystem
Integration Tests
E-GSE
LAT-MD-01533
M. Huffer
R. Claus
LAT Limited
Performance
Tests
LAT
Comprehensive
Performance
Tests
Mass
Properties
O Survey
GASU.
Htr Box
ACD
LAT Operational
Performance Tests
Survey
LAT Flight Software
Test Plan
LAT-TD-00786
L
C
Integrate EMI
Skirt, Htr Switch
Boxes
EMI SHIELD
M
Modal
survey
Install
Radiators
FinalMass
Properties
Observatory
Integration
M
L
Acoustic
Integrate ACD
Electronics Test
Plan
LAT-TD-00296
SUI
TEM
EP
PDU
L. Wai
LAT Survey & Alignment
L. Wai
LAT-MD-01586
Integrate X-LAT
L
E
Electrical
InterfaceTests
C
Radiator FitCHeck
Radiators
A
Aliveness
Tests
F
LAT Dynamics Test Plan
LAT-MD-01196
Y Ismael
M. Lovellette
Electrical Performance Tests
LAT-MD-01055
L. Wai
Thermal Tests
LAT-MD-01837
E. Gawehn
M. Lovellette
LAT Thermal Test Plan
LAT-MD-01600
M. Lovellette
J. Wang
LAT EMI Tests
LAT-MD-01838
LAT EMI/EMC Test Plan
No Number
M. Lovellette
T. Leisgang
M. Lovellette
LAT SVAC Test Plan
LAT-MD-01587
E. do Couto E Silva
SVAC Plan
LAT-MD-00446
E. Do Couto E Silva
S. Ritz
Particle Test Plan
LAT-MD-00440
G. Godfrey
M
Ship to
SA
Functional
Tests
Survey:
GASU
Pre-Ship
Survey
O Survey
LAT Survey Plan
LAT-TD-00895
L. Wai
M. Nordby
Mechanical Weight & CG
LAT-MD-01598
E. Gawehn
L. Wai
C
X-LAT Plate
LAT Instrumentation Plan
LAT-MD-00890
M. Lovellette
W. Davis
Facilities
LAT-MD-01386
Dynamics Tests
LAT-MD-01836
E. Gawehn
M. Lovellette
L Sine Vibe
PDU
LAT Contamination Control
LAT-MD-00404
Plan
J. Cullinan
E. Gawehn
M-GSE
E. Gawehn LAT-MD-01462
Mechanical S/S
Test Plan
LAT-SS-00493
Delivery
LAT Mechanical Integration
LAT-PS-00676
E. Gawehn
Component
Aliveness Tests
EMI/EMC
M Survey
LAT Handling
&Transportation Plan
LAT-MD-00452
LAT-MD-00649
LAT Integration & Test Plan
LAT-MD-01376
E. Bloom
L. Wai
ACD-PLAN-000050
L
Survey
EP
Observatory
Integration
LAT
Performance &
Operation Test
Plans
O
L
Optical
M
Limited
Performance
C
Comprehensive
Performance
Test Plan Flow w/ survey plans highlighted
Muon
v CDR 3/14/03
Document: LAT-PR-01779-01
Section 5 - Page 10
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
Survey Test Organization
•
Survey program goals - LAT-TD-00895, LAT Survey Plan
– Verify as-integrated interface stay-clears
– Verify LAT alignment requirements
– Verify science performance requirements
• Validate analytical thermal-mechanical analysis models
• Develop correlation functions for thermal-mechanical distortion
• Predict the expected on-orbit precision of the instrument
On-orbit Pointing
Celestial Point Source(s)
On-orbit Survey
Protons
Muons
Muon Survey
Star Tracker Optical Survey
NRL T-Vac
Spacecraft Integration
Reference Muon Survey
Reference Optical Survey
ACD Optical Survey
LAT Integration
LAT Integration
LAT Integration
TKR Acceptance Muon Survey
TKR Optical Survey
LAT Integration
LAT Integration
Source: LAT-MD-01586 LAT Survey and Alignment Plan
Document: LAT-PR-01779-01
Section 5 - Page 11
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
Survey Tests
Integrate Towers
1A: 1-Tower
optical survey
1B: 4-Tower
optical survey
Int. ACD
Ship/Vibe
2A,B,C: LAT baseline
muon survey
1C: 16-Tower
optical/muon survey
#
Goal
Verify SS stayclears, TKR
1A
alignment accuracy
Verify SS stayclears, TKR
1B
alignment accuracy
Verify SS stayclears; establish
1C
baseline position of all TKR's
2A Verify ACD stay-clears
2B
2C
3A
4A
4B
4C
Establish baseline position of
TKR's with ACD on
Characterize gravity effect on TKR
position w/ ACD
Re-baseline TKR positions after
transport, vibe
Characterize thermal effects on
LAT at min temp
Establish baseline position of
TKR's at nom operating temp
Characterize thermal effects on
LAT at max temp
When/Where
SLAC, after 1st TKR
module is integrated
SLAC, after 4 TKR
modules are integrated
SLAC, before ACD
integration
SLAC, after ACD and XLAT Plate integration
T-Bal/T-Vac
4A,B,C: T-Vac muon
survey at temp
>3 Cosmic Ray
test for continual
monitoring.
3A: Pre-T-Vac
muon survey
Orient. Method
Support/Configuration
4 corners on GPR; 1 TKR/CAL/ TEM
tower integrated. LAT off
4 corners on GPR; 4 TKR/CAL/ TEM
towers integrated. LAT off
3 mid-sides on GPR; ACD not on
LAT on. Push on 4th mid-side.
4-corners on GPR; ACD integrated.
LAT off.
+Z Up
Optical
+Z Up
Optical
+Z Horiz
Optical/
Muon
+Z Up
Optical
SLAC, after CPT
+Z Horiz
Muon
3 mid-sides on GPR
SLAC, after CPT
+Z Up
Muon
3 mid-sides on GPR
NRL, after vibe and before
T-Vac pump-down
+Z Horiz
Muon
3 mid-sides on T-Vac STE
NRL T-Vac Chamber
+Z Horiz
Muon
3 mid-sides on T-Vac STE
NRL T-Vac Chamber
+Z Horiz
Muon
3 mid-sides on T-Vac STE
NRL T-Vac Chamber
+Z Horiz
Muon
3 mid-sides on T-Vac STE
Cooling
Temp
None
RT
None
RT
Elec: forced air;
Det: conduction
None
Elec: forced air;
Det: conduction
Elec: forced air;
Det: conduction
Elec: forced air;
Det: conduction
Elec: X-LAT Pl,
Det: conduction
Elec: X-LAT Pl,
Det: conduction
Elec: X-LAT Pl,
Det: conduction
17 C
RT
17 C
17 C
17 C
-5 C
8C
17 C
LAT Optical and Muon Surveys During Integration and Test
Source: LAT-MD-00895 “LAT Instrument Survey Plan”
Document: LAT-PR-01779-01
Section 5 - Page 12
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
Optical Survey Test Equip and Setup
•
•
•
•
•
•
The optical surveys will be performed with a laser tracker supplied by the SLAC Metrology Department.
The Laser tracker(s) require continuous line of sight to the sphere mounted reflector as it is moved from the laser
tracker test point to the measurement point.
The laser tracker will be mounted on stands to allow the laser tracker to view all reflectors.
All surveys will be performed in the SLAC Building 33 LAT integration facility.
Room temperature controlled to within 5 oC (TBR)
I&T will provide the Survey Scientist for analysis of data from surveys
Equipment/Tool
Quantity/Unit
Supplier
GPR
Laser tracker
1 portable unit
SLAC Metrology Dept.,
Alignment Engineering Group
1-1/2” sphere mounted
reflectors
66 reflectors w/ bushings
SLAC Metrology Dept.,
Alignment Engineering Group
¾” sphere mounted reflectors
18 reflectors w/ bushings
SLAC Metrology Dept.,
Alignment Engineering Group
Surveyor
2 workers x 11 times x 4
hrs
SLAC Metrology Dept.,
Alignment Engineering Group
Tracker top tray “hat”
17 units
TKR subsystem
Flight grid reamed holes
4 holes x 4 sides
Mechanical subsystem
ACD mounting points
3 points x 4 sides
ACD subsystem
GRID
TKR
= reflector
= laser tracker
Feeler gauges
Document: LAT-PR-01779-01
2 units
I&T
Source: LAT-MD-01586
Section 5 - Page 13
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
Mass Properties
•
The Integration and Test mass
properties measurement plan is:
Mechanical Weight and CG Plan
LAT-MD-01598
LAT Instrument Performance
Verification Plan
LAT-MD-00408
T. Leisgang
Subsystem Test
Plans
Integration and Test Flow
Tower
Integration
TKR
CAL
Grid
TEM/TPS
LAT
Integration
Environmental Tests
F
C
E
F
A Integrate
E-Boxes
w/ Grid
Calorimeter Test
Plan
LAT-SS-00262
ACD Test Plan
L
Thermal S/S Test
Plan
No Number
Thermal
Balance
Thermal Vac
C
M
L
SIU
Subsystem
Integration Tests
E-GSE
LAT-MD-01533
M. Huffer
R. Claus
LAT Limited
Performance
Tests
LAT
Comprehensive
Performance
Tests
Mass
Properties
O Survey
GASU.
Htr Box
ACD
LAT Operational
Performance Tests
Survey
LAT Flight Software
Test Plan
LAT-TD-00786
L
C
Integrate EMI
Skirt, Htr Switch
Boxes
EMI SHIELD
M
Modal
survey
Install
Radiators
FinalMass
Properties
Observatory
Integration
M
L
Acoustic
Integrate ACD
Electronics Test
Plan
LAT-TD-00296
SUI
TEM
EP
PDU
L. Wai
LAT Instrumentation Plan
LAT-MD-00890
M. Lovellette
W. Davis
Facilities
LAT-MD-01386
LAT Survey & Alignment
L. Wai
LAT-MD-01586
LAT Survey Plan
LAT-TD-00895
L. Wai
M. Nordby
Mechanical Weight & CG
LAT-MD-01598
E. Gawehn
L. Wai
LAT Dynamics Test Plan
LAT-MD-01196
Y Ismael
M. Lovellette
Dynamics Tests
LAT-MD-01836
E. Gawehn
M. Lovellette
L Sine Vibe
PDU
LAT Contamination Control
LAT-MD-00404
Plan
J. Cullinan
E. Gawehn
M-GSE
E. Gawehn LAT-MD-01462
Mechanical S/S
Test Plan
LAT-SS-00493
Delivery
LAT Mechanical Integration
LAT-PS-00676
E. Gawehn
Component
Aliveness Tests
EMI/EMC
M Survey
LAT Handling
&Transportation Plan
LAT-MD-00452
LAT-MD-00649
LAT Integration & Test Plan
LAT-MD-01376
E. Bloom
L. Wai
ACD-PLAN-000050
L
Survey
EP
Observatory
Integration
LAT Test
Integrate
TKR/CAL&
TEM'swith
Grid
E
A
O
Tracker Tower Test
Plan
LAT-TD-00155
LAT
Performance &
Operation Test
Plans
Electrical Performance Tests
LAT-MD-01055
L. Wai
Thermal Tests
LAT-MD-01837
E. Gawehn
M. Lovellette
LAT Thermal Test Plan
LAT-MD-01600
M. Lovellette
J. Wang
LAT EMI Tests
LAT-MD-01838
LAT EMI/EMC Test Plan
No Number
M. Lovellette
T. Leisgang
M. Lovellette
C
Integrate X-LAT
X-LAT Plate
L
E
Electrical
InterfaceTests
C
Radiator FitCHeck
Radiators
A
Aliveness
Tests
F
SVAC Plan
LAT-MD-00446
E. Do Couto E Silva
S. Ritz
Particle Test Plan
LAT-MD-00440
G. Godfrey
M
Ship to
SA
Functional
Tests
Survey:
GASU
Pre-Ship
Survey
O Survey
LAT SVAC Test Plan
LAT-MD-01587
E. do Couto E Silva
O
L
Optical
M
Limited
Performance
C
Comprehensive
Performance
Test Plan Flow
Muon
v CDR 3/14/03
Document: LAT-PR-01779-01
Section 5 - Page 14
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
Mass Properties
•
•
WEIGHT DETERMINATION
– Weights of all LAT flight subsystem and MGSE elements will be
measured to an accuracy 0.025% of its determined weight.
CENTER OF GRAVITY MEASUREMENT
– Cg measurement of all LAT flight subsystem elements will be
performed to an accuracy of ±1.0 mm [± 0.039 inch]for X, Y and Z
axes (axes as defined in LAT-TD-00035, LAT Coordinate System).
– Cg measurement of the integrated LAT (minus radiator hardware
as described above) will be performed to an accuracy of ±2.0 mm
[± 0.079 inch] in the X and Y axes and Z axes.
– Cg measurement of the LAT Vibe Test Fixture will be performed to
an accuracy of ±2.0 mm in the X, Y and Z axes.
– Cg measurement of the LAT Transport Container will be measured
to within ± 152 mm [± 6 inches] for the X, Y and Z axes.
• Definition of the LAT Transport Container axes is to be
consistent with the LAT when mounted inside the container.
Document: LAT-PR-01779-01
Section 5 - Page 15
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
Modal Survey
•
The system level requirements are
defined in the LAT Dynamics Test Plan
LAT-TD-001196.
The I&T plan to implement the Modal
Survey is in the LAT Dynamics Test
Performance Plan LAT-MD-01836.
•
TKR
CAL
Grid
TEM/TPS
LAT
Integration
O
Environmental Tests
F
C
E
F
A Integrate
E-Boxes
w/ Grid
Subsystem Test
Plans
Calorimeter Test
Plan
LAT-SS-00262
ACD Test Plan
LAT
Performance &
Operation Test
Plans
L
Thermal S/S Test
Plan
No Number
Thermal
Balance
Thermal Vac
C
M
L
SIU
Subsystem
Integration Tests
E-GSE
LAT-MD-01533
M. Huffer
R. Claus
LAT Limited
Performance
Tests
LAT
Comprehensive
Performance
Tests
Mass
Properties
O Survey
GASU.
Htr Box
ACD
LAT Operational
Performance Tests
Survey
LAT Flight Software
Test Plan
LAT-TD-00786
L
C
Integrate EMI
Skirt, Htr Switch
Boxes
EMI SHIELD
M
Modal
survey
Install
Radiators
FinalMass
Properties
Observatory
Integration
M
L
Acoustic
Integrate ACD
Electronics Test
Plan
LAT-TD-00296
SUI
TEM
EP
PDU
L. Wai
LAT Instrumentation Plan
LAT-MD-00890
M. Lovellette
W. Davis
Facilities
LAT-MD-01386
LAT Survey & Alignment
L. Wai
LAT-MD-01586
LAT Survey Plan
LAT-TD-00895
L. Wai
M. Nordby
Mechanical Weight & CG
LAT-MD-01598
E. Gawehn
L. Wai
LAT Dynamics Test Plan
LAT-MD-01196
Y Ismael
M. Lovellette
Dynamics Tests
LAT-MD-01836
E. Gawehn
M. Lovellette
L Sine Vibe
PDU
LAT Contamination Control
LAT-MD-00404
Plan
J. Cullinan
E. Gawehn
M-GSE
E. Gawehn LAT-MD-01462
Mechanical S/S
Test Plan
LAT-SS-00493
Delivery
LAT Mechanical Integration
LAT-PS-00676
E. Gawehn
Component
Aliveness Tests
EMI/EMC
M Survey
LAT Handling
&Transportation Plan
LAT-MD-00452
LAT-MD-00649
LAT Integration & Test Plan
LAT-MD-01376
E. Bloom
L. Wai
ACD-PLAN-000050
L
Survey
EP
Observatory
Integration
LAT Test
Integrate
TKR/CAL&
TEM'swith
Grid
E
A
T. Leisgang
Tracker Tower Test
Plan
LAT-TD-00155
Integration and Test Flow
Tower
Integration
LAT Instrument Performance
Verification Plan
LAT-MD-00408
Electrical Performance Tests
LAT-MD-01055
L. Wai
Thermal Tests
LAT-MD-01837
E. Gawehn
M. Lovellette
LAT Thermal Test Plan
LAT-MD-01600
M. Lovellette
J. Wang
LAT EMI Tests
LAT-MD-01838
LAT EMI/EMC Test Plan
No Number
M. Lovellette
T. Leisgang
M. Lovellette
C
Integrate X-LAT
X-LAT Plate
L
E
Electrical
InterfaceTests
C
Radiator FitCHeck
Radiators
A
Aliveness
Tests
F
SVAC Plan
LAT-MD-00446
E. Do Couto E Silva
S. Ritz
Particle Test Plan
LAT-MD-00440
G. Godfrey
M
Ship to
SA
Functional
Tests
Survey:
GASU
Pre-Ship
Survey
O Survey
LAT SVAC Test Plan
LAT-MD-01587
E. do Couto E Silva
O
L
Optical
M
Limited
Performance
C
Comprehensive
Performance
Test Plan Flow
Muon
v CDR 3/14/03
Document: LAT-PR-01779-01
Section 5 - Page 16
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
LAT Modal Survey
•
•
Test goals
– Validate the LAT structural finite element analysis (FEA) model by
correlating with test results
– Measure all primary modes of the LAT/Grid structure.
– Measure the first mode, and all modes predicted to have high
mass participation, for every subsystem
– Measure as many natural frequencies of the LAT up to 150 Hz as
practical
– Test results will be used to evaluate the predicted expected modal
frequencies and mode shapes, and used to modify the structural
FEA, if needed.
– Finalize test environments and notching plans for sine vibration
testing
Configuration
– Fully integrated, except the Radiators are not mounted
– Supported off of its spacecraft (SC) mount brackets,
– +Z-axis point vertically up
– LAT powered off during testing
Source: LAT-MD-01196-01, “LAT Dynamics Test Plan,” March 2003
Document: LAT-PR-01779-01
Section 5 - Page 17
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
LAT Modal Survey
•
•
Instrumentation
– High-precision accelerometers mounted to the
LAT and test stand
Specialized test equipment requirements
– LAT supported by the Vibe Test Plate which
provides a rigid support of each mount point
– Vibe Test Plate sits on a massive base-isolated
table, to damp high-frequency base noise being
transmitted to the structure
– Excited using two stingers, located under the LAT
XYZ-Mnt
XYZ-Grid
Y-ACD
X-ACD
Y-ACD
Out-of-Plane
Accel
X-ACD
Tri-axis Accel
XYZ-ACD
XYZ-ACD
ACD: outer surface
of honeycomb
LAT +Z
LAT +Y
ACD Accelerometer
Placement
LAT +X
XYZ-Grid
12
X-TKR
14
Z-TKR
13
XYZ-Elec
15
X-TKR
15
MTY
9
10
LAT
+Y
11
XYZ-CAL
11
Y-TKR
XYZ-CAL
5
XYZ-CAL
0
EPU
9
6
X-TKR
Z-TKR
8
SIU
LAT +X
Z-TKR
LAT
+Y
XYZ-CAL
XYZ-CAL
10
LAT +X
XYZ-Elec
XYZ-Grid
Z-TKR 4
12
MTY
Y-TKR
Z-TKR
X-TKR
XYZ-Grid
13
14
MTY
XYZ-CAL
8
XYZ-Elec
GASU
PDU
7
X-axis Accel
7
6
5
4
SIU
Y-TKR
X-axis Accel
XYZ-Elec
Y-axis Accel
Y-axis Accel
XYZ-CAL
1
2
Y-TKR
3
Y-TKR
XYZ-CAL
X-TKR
Z-TKR
Z-axis Accel
XYZ-CAL
Tri-axis Accel
3
TKR (z = 640 mm)
X-TKR
XYZ-Grid
XYZ-CAL
2
EPU
1
MTY
Z-axis Accel
Tri-axis Accel
0
MTY
EPU
CAL (z = -27 mm)
Grid ( z = 0 mm)
XYZ-Mnt
XYZ-ACD
Z-ACD
XYZ-Mnt
XYZ-Grid
Y-TKR
XYZ-ACD
Elec (z = -500 mm)
CAL (z = -251 mm)
XYZ-Elec
XYZ-Grid
XYZ-Grid
XYZ-Mnt
TKR, CAL, and Grid Accelerometer Placement
CAL Bottom and E-Box Accelerometer Placement
Source: LAT-MD-01196-01, “LAT Dynamics Test Plan,” March 2003
Document: LAT-PR-01779-01
Section 5 - Page 18
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
LAT Modal Survey Test
• Test sequence
– Excite LAT at two -X corners in the Z-direction, in phase
– Excite LAT at two -X corners in the Z-direction, 180 degrees
out of phase—intended to excite LAT “potato chip” mode
and other anti-symmetric twisting modes
– Excite LAT at two -X corners in the X-direction, in phase—
intended to excite LAT, ACD, TKR, and CAL lateral modes
– Excite LAT web crossings on either side of the Grid center
from the underside—intended to excite LAT drumhead
mode
• Test levels
– TBD
– Levels will be set, based on pre-test analysis using asmeasured damping coefficients for subsystems
Source: LAT-MD-01196-01, “LAT Dynamics Test Plan,” March 2003
Document: LAT-PR-01779-01
Section 5 - Page 19
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
Modal Test Setup
• Test will be at SLAC because we
will need to remove ACD to
uninstall/install appropriate accels
before shipment to NRL.
• Soft Suspension System With
Mass Loaded Interface
• Pneumatic Isolators used to
support system (provided by NRL)
• LAT Mounted to Steel Plate Reaction Mass (provided by SLAC)
• NRL will provide the monitoring
equipment
• Test accelerometers are supplied
by TBD depending on final release
of the Instrumentation Plan .
Document: LAT-PR-01779-01
Section 5 - Page 20
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
EMI/EMC Tests
•
The system level requirements are
defined in the LAT EMI/EMC Test Plan
(TBD).
The I&T plan to implement the EMI/EMC
Test is in the LAT EMI/EMC Test
Performance Plan LAT-MD-01838.
•
TKR
CAL
Grid
TEM/TPS
LAT
Integration
O
Environmental Tests
F
C
E
F
A Integrate
E-Boxes
w/ Grid
Subsystem Test
Plans
Calorimeter Test
Plan
LAT-SS-00262
ACD Test Plan
LAT
Performance &
Operation Test
Plans
L
Thermal S/S Test
Plan
No Number
Thermal
Balance
Thermal Vac
C
M
L
SIU
Subsystem
Integration Tests
E-GSE
LAT-MD-01533
M. Huffer
R. Claus
LAT Limited
Performance
Tests
LAT
Comprehensive
Performance
Tests
Mass
Properties
O Survey
GASU.
Htr Box
ACD
LAT Operational
Performance Tests
Survey
LAT Flight Software
Test Plan
LAT-TD-00786
L
C
Integrate EMI
Skirt, Htr Switch
Boxes
EMI SHIELD
M
Modal
survey
Install
Radiators
FinalMass
Properties
Observatory
Integration
M
L
Acoustic
Integrate ACD
Electronics Test
Plan
LAT-TD-00296
SUI
TEM
EP
PDU
L. Wai
LAT Instrumentation Plan
LAT-MD-00890
M. Lovellette
W. Davis
Facilities
LAT-MD-01386
LAT Survey & Alignment
L. Wai
LAT-MD-01586
LAT Survey Plan
LAT-TD-00895
L. Wai
M. Nordby
Mechanical Weight & CG
LAT-MD-01598
E. Gawehn
L. Wai
LAT Dynamics Test Plan
LAT-MD-01196
Y Ismael
M. Lovellette
Dynamics Tests
LAT-MD-01836
E. Gawehn
M. Lovellette
L Sine Vibe
PDU
LAT Contamination Control
LAT-MD-00404
Plan
J. Cullinan
E. Gawehn
M-GSE
E. Gawehn LAT-MD-01462
Mechanical S/S
Test Plan
LAT-SS-00493
Delivery
LAT Mechanical Integration
LAT-PS-00676
E. Gawehn
Component
Aliveness Tests
EMI/EMC
M Survey
LAT Handling
&Transportation Plan
LAT-MD-00452
LAT-MD-00649
LAT Integration & Test Plan
LAT-MD-01376
E. Bloom
L. Wai
ACD-PLAN-000050
L
Survey
EP
Observatory
Integration
LAT Test
Integrate
TKR/CAL&
TEM'swith
Grid
E
A
T. Leisgang
Tracker Tower Test
Plan
LAT-TD-00155
Integration and Test Flow
Tower
Integration
LAT Instrument Performance
Verification Plan
LAT-MD-00408
Electrical Performance Tests
LAT-MD-01055
L. Wai
Thermal Tests
LAT-MD-01837
E. Gawehn
M. Lovellette
LAT Thermal Test Plan
LAT-MD-01600
M. Lovellette
J. Wang
LAT EMI Tests
LAT-MD-01838
LAT EMI/EMC Test Plan
No Number
M. Lovellette
T. Leisgang
M. Lovellette
C
Integrate X-LAT
X-LAT Plate
L
E
Electrical
InterfaceTests
C
Radiator FitCHeck
Radiators
A
Aliveness
Tests
F
SVAC Plan
LAT-MD-00446
E. Do Couto E Silva
S. Ritz
Particle Test Plan
LAT-MD-00440
G. Godfrey
M
Ship to
SA
Functional
Tests
Survey:
GASU
Pre-Ship
Survey
O Survey
LAT SVAC Test Plan
LAT-MD-01587
E. do Couto E Silva
O
L
Optical
M
Limited
Performance
C
Comprehensive
Performance
Test Plan Flow
Muon
v CDR 3/14/03
Document: LAT-PR-01779-01
Section 5 - Page 21
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
EMI/EMC Tests
Table II. EMI Requirements Appli cability (TBD)
•
•
•
Purpose
– Ensure compatibility of LAT with
other space vehicle systems
– Ensure compatibility of other space
vehicle system with LAT
– Demonstrates that adequate margin
exists between susceptibility and
noise levels
Configuration
– LAT will be integrated with EMI
skirt, X-LAT plates installed and
radiators not installed
Applicable Documents
– LAT EMI Test Plan, LAT-MD-TBD
– LAT Environmental Parameters
Specification, LAT-SS-00778
– LAT Program Inst. Performance
Verification Plan, LAT-MD-00408
– MIL-STD-461E
– GSFC 433-RQMT-0005 (Draft)
Test
Condu cted E mission Tests
DC Power Leads
Spikes DC Pwr
Antenna Termi nals
Power Qualit y Ripple and No is e
Radiated E mi ssion Tests
DC Magne tic Fld/Properties Sys
DC Magne tic Fld/Prop. Comp.
AC Magne tic Field System
AC Magne tic Field Componen t
Electric Fields System
Electric Fields Componen t
Antenna Port Emis sion S/C
Condu cted Susceptibilit y Tests
Power Line
Intermodulation Produc ts
Signa l Rejection
Cross Modulation
Power Line Trans ients
Radiated Susceptib ility Tests
Electric Fields and G eneral EMC
EMC wit h Spacecraft Tx
EMI RD Top
Level Para . #
5.2, 6.2
5.2
5.13, 6.13
4.2
4.1, 4.7
5.7, 6.7
4.1
5.1, 6.1
4.1
5.1, 6.1
6.13
Note
Level of Assembl y
S/C
Comp .(6) INST
X
2
X
4
X
Unintentiona l Electric Field
Magne tic Field Susceptibilit y
4.3, 5.3 , 6.3
4.3, 5.3 , 6.3
S/C = Spacecraft Level
Comp = Component Level
INST = Instrument
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
5
X
4.4, 5.4 , 6.4
6.13
6.13
6.13
4.4, 5.4 , 6.4
4.3, 5.3 , 6.3
4.3, 5.3 , 6.3
X
X
X
3, 4
3, 4
3, 4
2
X
X
X
X
X
X
Tx = Transmitters
Notes 2 Performe d at system and subsys tem level only
3 Definition of suscept ibility defined in individu al test plan per paragraph 4.3
4 System level requirement met b y analysis and comparison of system and l ower level of assembly
test data
5 System level test performe d as part of radi ated EMC with Spa cecraft Transmitters
6 These ar e the design requ irements. Delineation of Qualification and A ccept ance Test requirements
vs
level of assembly is specified i n Tabl es IV and V .
Source: GSFC 433-RQMT-0005 (Draft)
Document: LAT-PR-01779-01
Section 5 - Page 22
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
EMI/EMC Test Suite
Test
Description
Range
RE101
RE102
CE101
CE102
RS101
RS103
CS101
CS114
Radiated Emissions
Radiated Emissions
Conducted Emissions
Conducted Emissions
Radiated Susceptibility
Radiated Susceptibility
Conducted Susceptibility
Conducted Susceptibility, bulk
cable injection
Conducted Susceptibility, bulk
cable injection, impulse excitation
Conducted Susceptibility, damped
sinusoidal transients,
cables and power leads
20 Hz to 50 kHz
10 kHz to 18GHz
10 Hz to 10 KHz
10 kHz to 10 MHz
20 Hz to 50 kHz
2MHz to 40 GHz
30 Hz to 150 kHz
10 kHz to 200 MHz
CS115
CS116
N/A
10 kHz to 100MHz
•Actual test levels will be updated from those shown
Document: LAT-PR-01779-01
Section 5 - Page 23
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
EMI/EMC Testing Facility
•
•
•
•
•
EMI/EMC Testing will be performed at
the NRL facility
2 Chambers, GLAST is currently
scheduled to use the smaller chamber
19' clearance tip to tip on the cones
door 10.5' wide by 10' high, 0.5" rise
from exterior floor (minimal floor rise is
reason for selecting this chamber)
Capable of MIL-STD-461 testing up to 18
GHz RS, 40 GHz RE
Photo caption: Windsat @ NRL
And there is a bigger chamber.
Document: LAT-PR-01779-01
Section 5 - Page 24
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
Sine Vibration Test
•
The system level requirements are
defined in the LAT Dynamics Test Plan
LAT-TD-001196.
The I&T plan to implement the Sine
Vibration Test is in the LAT Dynamics
Test Performance Plan LAT-MD-01836.
•
TKR
CAL
Grid
TEM/TPS
LAT
Integration
O
Environmental Tests
F
C
E
F
A Integrate
E-Boxes
w/ Grid
Thermal S/S Test
Plan
No Number
Thermal Vac
C
M
L
Delivery
Mass
Properties
GASU.
ACD
LAT Flight Software
Test Plan
LAT-TD-00786
L
Modal
survey
Install
Radiators
FinalMass
Properties
Observatory
Integration
M
L
Acoustic
Integrate ACD
Electronics Test
Plan
LAT-TD-00296
SUI
TEM
EP
PDU
LAT Mechanical Integration
LAT-PS-00676
E. Gawehn
LAT Contamination Control
LAT-MD-00404
Plan
J. Cullinan
E. Gawehn
Component
Aliveness Tests
M-GSE
E. Gawehn LAT-MD-01462
Subsystem
Integration Tests
E-GSE
LAT-MD-01533
M. Huffer
R. Claus
LAT Limited
Performance
Tests
LAT
Comprehensive
Performance
Tests
L. Wai
LAT Instrumentation Plan
LAT-MD-00890
M. Lovellette
W. Davis
Facilities
LAT-MD-01386
LAT Survey & Alignment
L. Wai
LAT-MD-01586
LAT Survey Plan
LAT-TD-00895
L. Wai
M. Nordby
Mechanical Weight & CG
LAT-MD-01598
E. Gawehn
L. Wai
LAT Dynamics Test Plan
LAT-MD-01196
Y Ismael
M. Lovellette
Dynamics Tests
LAT-MD-01836
E. Gawehn
M. Lovellette
LAT Operational
Performance Tests
Survey
C
Integrate EMI
Skirt, Htr Switch
Boxes
EMI SHIELD
M
LAT Handling
&Transportation Plan
LAT-MD-00452
LAT-MD-00649
LAT Integration & Test Plan
LAT-MD-01376
E. Bloom
L. Wai
Mechanical S/S
Test Plan
LAT-SS-00493
L Sine Vibe
Htr Box
ACD Test Plan
LAT
Performance &
Operation Test
Plans
EMI/EMC
M Survey
O Survey
Calorimeter Test
Plan
LAT-SS-00262
L
Thermal
Balance
SIU
PDU
Subsystem Test
Plans
ACD-PLAN-000050
L
Survey
EP
Observatory
Integration
LAT Test
Integrate
TKR/CAL&
TEM'swith
Grid
E
A
T. Leisgang
Tracker Tower Test
Plan
LAT-TD-00155
Integration and Test Flow
Tower
Integration
LAT Instrument Performance
Verification Plan
LAT-MD-00408
Electrical Performance Tests
LAT-MD-01055
L. Wai
Thermal Tests
LAT-MD-01837
E. Gawehn
M. Lovellette
LAT Thermal Test Plan
LAT-MD-01600
M. Lovellette
J. Wang
LAT EMI Tests
LAT-MD-01838
LAT EMI/EMC Test Plan
No Number
M. Lovellette
T. Leisgang
M. Lovellette
C
Integrate X-LAT
X-LAT Plate
L
E
Electrical
InterfaceTests
C
Radiator FitCHeck
Radiators
A
Aliveness
Tests
F
SVAC Plan
LAT-MD-00446
E. Do Couto E Silva
S. Ritz
Particle Test Plan
LAT-MD-00440
G. Godfrey
M
Ship to
SA
Functional
Tests
Survey:
GASU
Pre-Ship
Survey
O Survey
LAT SVAC Test Plan
LAT-MD-01587
E. do Couto E Silva
O
L
Optical
M
Limited
Performance
C
Comprehensive
Performance
Test Plan Flow
Muon
v CDR 3/14/03
Document: LAT-PR-01779-01
Section 5 - Page 25
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
Sine Vibration Test
•
•
Test goals
– Verify the LAT’s ability to survive the low frequency launch
environment
– Test for workmanship on hardware such as wiring harnesses, MLI,
and cable support and strain-reliefs which will not have been fully
verified at the subsystem level
– Interface verification test for subsystem structural interfaces to
the LAT Grid
– Qualify LAT-SC interface
Configuration
– Fully integrated, except the Radiators are not installed
– Supported off of its spacecraft (SC) mount brackets, on the
Vibration Test Stand
– The LAT is tested in all three axes, X, Y, and Z independently,
requiring re-configuration between tests
– The LAT is powered off during sinusoidal vibration testing, and
the EGSE cable harnesses removed
Source: LAT-MD-01196-01, “LAT Dynamics Test Plan,” March 2003
Document: LAT-PR-01779-01
Section 5 - Page 26
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
Sine Vibration Test
•
•
Instrumentation
– Accelerometers mounted to
the LAT and test stand, to
cover the entire dynamic
range predicted for the LAT
and subsystems (LAT
Instrumentation Plan, LATMD-00890)
Specialized test equipment
requirements
– The Vibe Test Stand must
support the LAT at the SC
interface with flight-like
connections
– The Stand must allow for
reconfiguration to alternate
axes, with the LAT attached,
to avoid unnecessary
handling
XYZ-Mnt
XYZ-Grid
XYZ-Mnt
XYZ-Grid
XYZ-Grid
XYZ-TKR12
13
XYZ-TKR
14
XYZ-TKR
15
XYZ-TKR
9
XYZ-TKR10
11
XYZ-TKR
XYZ-CAL
8
XYZ-TKR
XYZ-TKR
LAT
+Y
LAT +X
XYZ-Grid
XYZ-CAL
XYZ-Grid
4
5
XYZ-TKR
6
XYZ-TKR
7
XYZ-TKR
X-axis Accel
Y-axis Accel
XYZ-CAL
Z-axis Accel
0
XYZ-TKR
1
XYZ-TKR
2
XYZ-TKR
XYZ-TKR 3
Tri-axis Accel
TKR (z = 640 mm)
CAL (z = -27 mm)
XYZ-CAL
Grid ( z = 0 mm)
XYZ-Grid
XYZ-Mnt
XYZ-Grid
XYZ-Grid
XYZ-Mnt
TKR, CAL, and Grid Accelerometer Placement
Source: LAT-MD-01196-01, “LAT Dynamics Test Plan,” March 2003
Document: LAT-PR-01779-01
Section 5 - Page 27
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
Sine Vibration Test
•
•
Test sequence
– X-Direction Sine Vibe
• Low-level vibration to verify that all instrumentation is operational
• Low-level random vibration signature of the entire frequency range
• Acceptance level sweep
• PFQ level sweep
• Low-level random vibration signature
• Limited Performance Test—re-connect E-GSE cabling; execute LPT while still on
vibe test stand
Qualification Sine Vibration Test Levels
– Y-Direction Sine Vibe
Test levels
Sweep Rate
• Low-level random vibration signature Axis Freq. (Hz)
Thrust 5 to 7.4 1.27 cm (0.5 in.) double amplitude 24 octaves/min
• Acceptance level sweep
7.4 to 50 1.4 g (zero to peak)
• PFQ level sweep
Lateral 5 to 6.2 1.27 cm (0.5 in.) double amplitude 4
2 octaves/min
• Low-level random vibration signature
6.2 to 50 1.0 g (zero to peak)
– Z-Direction Sine Vibe
LAT Sine Vibration Minimum
• Low-level random vibration signature
Test Levels
• Acceptance level sweep
Source: LAT-SS-00778-01, “LAT Environmental Specification,” March 2003
• PFQ level sweep
• Low-level random vibration signature
• Limited Performance Test—re-connect E-GSE cabling; execute LPT while still on vibe
test stand
Test levels
– Levels will be established with pre-test analysis to 1.25 times the static-equivalent
acceleration values, without exceeding interface limit loads
Source: LAT-MD-01196-01, “LAT Dynamics Test Plan,” March 2003
Document: LAT-PR-01779-01
Section 5 - Page 28
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
Sine Vibration Test Facility
Testing will be performed at the NRL
Naval Center for Space Technology
Facility Capability
•
Four electrodynamic
shakers (one 40-klb,
one 30-klb, and two
18-klb)
•
Two slip tables
•
Three power
amplifiers
•
The 40-klb shaker
will be replaced with
a 50-klb unit ~ Nov
2003
•
LAT will use the 50klb unit
Photo caption: Coriollis during vibration testing @ NRL
Document: LAT-PR-01779-01
Section 5 - Page 29
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
Acoustic Test
•
The system level requirements are
defined in the LAT Dynamics Test Plan
LAT-TD-001196.
The I&T plan to implement the Acoustic
Test is in the LAT Dynamics Test
Performance Plan LAT-MD-01836.
•
TKR
CAL
Grid
TEM/TPS
LAT
Integration
O
Environmental Tests
F
C
E
F
A Integrate
E-Boxes
w/ Grid
Subsystem Test
Plans
Calorimeter Test
Plan
LAT-SS-00262
ACD Test Plan
LAT
Performance &
Operation Test
Plans
L
Thermal S/S Test
Plan
No Number
Thermal
Balance
Thermal Vac
C
M
L
SIU
Subsystem
Integration Tests
E-GSE
LAT-MD-01533
M. Huffer
R. Claus
LAT Limited
Performance
Tests
LAT
Comprehensive
Performance
Tests
Mass
Properties
O Survey
GASU.
Htr Box
ACD
LAT Operational
Performance Tests
Survey
LAT Flight Software
Test Plan
LAT-TD-00786
L
C
Integrate EMI
Skirt, Htr Switch
Boxes
EMI SHIELD
M
Modal
survey
Install
Radiators
FinalMass
Properties
Observatory
Integration
M
L
Acoustic
Integrate ACD
Electronics Test
Plan
LAT-TD-00296
SUI
TEM
EP
PDU
L. Wai
LAT Instrumentation Plan
LAT-MD-00890
M. Lovellette
W. Davis
Facilities
LAT-MD-01386
LAT Survey & Alignment
L. Wai
LAT-MD-01586
LAT Survey Plan
LAT-TD-00895
L. Wai
M. Nordby
Mechanical Weight & CG
LAT-MD-01598
E. Gawehn
L. Wai
LAT Dynamics Test Plan
LAT-MD-01196
Y Ismael
M. Lovellette
Dynamics Tests
LAT-MD-01836
E. Gawehn
M. Lovellette
L Sine Vibe
PDU
LAT Contamination Control
LAT-MD-00404
Plan
J. Cullinan
E. Gawehn
M-GSE
E. Gawehn LAT-MD-01462
Mechanical S/S
Test Plan
LAT-SS-00493
Delivery
LAT Mechanical Integration
LAT-PS-00676
E. Gawehn
Component
Aliveness Tests
EMI/EMC
M Survey
LAT Handling
&Transportation Plan
LAT-MD-00452
LAT-MD-00649
LAT Integration & Test Plan
LAT-MD-01376
E. Bloom
L. Wai
ACD-PLAN-000050
L
Survey
EP
Observatory
Integration
LAT Test
Integrate
TKR/CAL&
TEM'swith
Grid
E
A
T. Leisgang
Tracker Tower Test
Plan
LAT-TD-00155
Integration and Test Flow
Tower
Integration
LAT Instrument Performance
Verification Plan
LAT-MD-00408
Electrical Performance Tests
LAT-MD-01055
L. Wai
Thermal Tests
LAT-MD-01837
E. Gawehn
M. Lovellette
LAT Thermal Test Plan
LAT-MD-01600
M. Lovellette
J. Wang
LAT EMI Tests
LAT-MD-01838
LAT EMI/EMC Test Plan
No Number
M. Lovellette
T. Leisgang
M. Lovellette
C
Integrate X-LAT
X-LAT Plate
L
E
Electrical
InterfaceTests
C
Radiator FitCHeck
Radiators
A
Aliveness
Tests
F
SVAC Plan
LAT-MD-00446
E. Do Couto E Silva
S. Ritz
Particle Test Plan
LAT-MD-00440
G. Godfrey
M
Ship to
SA
Functional
Tests
Survey:
GASU
Pre-Ship
Survey
O Survey
LAT SVAC Test Plan
LAT-MD-01587
E. do Couto E Silva
O
L
Optical
M
Limited
Performance
C
Comprehensive
Performance
Test Plan Flow
Muon
v CDR 3/14/03
Document: LAT-PR-01779-01
Section 5 - Page 30
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
LAT Acoustic Test
•
XYZ-Mnt
XYZ-Grid
XYZ-Mnt
Test goals
– Verify the LAT’s ability to survive the acoustic launch
environment
– Test for workmanship on LAT hardware, especially
that hardware which responds to acoustic loading
– Validate the acoustic analysis
Configuration
– LAT is fully integrated, including the Radiators
– Mounted to STE using the flight-configuration bolted
joint
– LAT +Z-axis vertical, and with Radiators integrated to
the Grid as well as to the STE at the SC strut mount
points
– LAT is powered off during acoustic testing, and the ETKR, CAL, and Grid Accelerometer Placement
GSE cable harnesses removed
Instrumentation
– Accelerometers mounted to the LAT and test stand
(per LAT Instrumentation Plan, LAT-MD-00890)
LAT +Z
– Microphones mounted around the LAT
LAT +X
Specialized test equipment requirements
Y-axis Accel
– The Vibe Test Stand must support the LAT in the same
Tri-axis Accel
degrees of freedom as the SC flexures, to avoid overRadiator Inner Face
sheet
constraining the Grid and Radiators
– The STE fills the volume between the Radiators, so
Radiators Accelerometer Placement
must approximate the acoustic behavior of the SC
XYZ-Grid
XYZ-Grid
XYZ-TKR12
13
XYZ-TKR
14
XYZ-TKR
15
XYZ-TKR
9
XYZ-TKR10
11
XYZ-TKR
XYZ-CAL
8
XYZ-TKR
XYZ-TKR
LAT
+Y
LAT +X
•
XYZ-Grid
XYZ-CAL
XYZ-Grid
4
5
XYZ-TKR
6
XYZ-TKR
7
XYZ-TKR
X-axis Accel
Y-axis Accel
XYZ-CAL
Z-axis Accel
0
XYZ-TKR
1
XYZ-TKR
2
XYZ-TKR
XYZ-TKR 3
Tri-axis Accel
TKR (z = 640 mm)
CAL (z = -27 mm)
XYZ-CAL
Grid ( z = 0 mm)
XYZ-Grid
XYZ-Mnt
•
•
XYZ-Grid
XYZ-Grid
XYZ-Mnt
Source: LAT-MD-01196-01, “LAT Dynamics Test Plan,” March 2003
Document: LAT-PR-01779-01
Section 5 - Page 31
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
LAT Acoustic Test (cont)
•
Test sequence
– Low-level acoustic to verify that all
instrumentation is operational and
taking useful data
– Acceptance level test—ramp up sound
pressure level (SPL) to AT levels
– PFQ level test—ramp up SPL to QT
levels
– Ramp down SPL and turn off
– TBD modal signature test
– Limited Performance Test—re-connect
E-GSE cable harnesses and execute
LPT
Test levels
– Fairing SPL’s are shown
– Final SPL’s for testing will be
determined
by pre-test analysis, to factor in fillfraction
in acoustic chamber
150
Acoustic Loading
145
Sound Pressure Level (dB)
•
140
135
130
125
120
115
110
Accept Test (dB)
105
Qual Test (dB)
100
10
100
1000
10000
Frequency (Hz)
LAT Acoustic Test Levels
Source: LAT-SS-0077801, “LAT Environmental Specification,” March 2003
Source: LAT-MD-01196-01, “LAT Dynamics Test Plan,” March 2003
Document: LAT-PR-01779-01
Section 5 - Page 32
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
NRL Acoustic Chamber
•
•
•
•
LAT will mount on a special
stand to accommodate
radiators. (TBD)
Support test stand will sit on
floor of reverberant acoustic
chamber
NRL chamber capabilities:
sound pressure level of 153 dB
through a range of 32-10,000 Hz
Coriolis / Windsat system shown
here on test stand
Photo caption: Coriollis/Windsat @ NRL
Document: LAT-PR-01779-01
Section 5 - Page 33
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
LAT Thermal Balance/Thermal-Vacuum Tests
•
The system level requirements are
defined in the LAT Thermal Test Plan
LAT-TD-001600.
The I&T plan to implement the
TBAL/TVAL Testing is in the LAT
Thermal Test Performance Plan LAT-MD01837.
•
Integration and Test Flow
Tower
Integration
TKR
CAL
Grid
TEM/TPS
LAT
Integration
LAT Test
Integrate
TKR/CAL&
TEM'swith
Grid
E
A
O
Environmental Tests
F
C
E
F
A Integrate
E-Boxes
w/ Grid
T. Leisgang
Subsystem Test
Plans
Tracker Tower Test
Plan
LAT-TD-00155
Calorimeter Test
Plan
LAT-SS-00262
ACD Test Plan
LAT
Performance &
Operation Test
Plans
L
Thermal S/S Test
Plan
No Number
Thermal
Balance
Thermal Vac
C
M
L
SIU
Subsystem
Integration Tests
E-GSE
LAT-MD-01533
M. Huffer
R. Claus
LAT Limited
Performance
Tests
LAT
Comprehensive
Performance
Tests
Mass
Properties
O Survey
GASU.
Htr Box
ACD
LAT Operational
Performance Tests
Survey
LAT Flight Software
Test Plan
LAT-TD-00786
L
C
Integrate EMI
Skirt, Htr Switch
Boxes
EMI SHIELD
M
Modal
survey
Install
Radiators
FinalMass
Properties
Observatory
Integration
M
L
Acoustic
Integrate ACD
Electronics Test
Plan
LAT-TD-00296
SUI
TEM
EP
PDU
L. Wai
LAT Instrumentation Plan
LAT-MD-00890
M. Lovellette
W. Davis
Facilities
LAT-MD-01386
LAT Survey & Alignment
L. Wai
LAT-MD-01586
LAT Survey Plan
LAT-TD-00895
L. Wai
M. Nordby
Mechanical Weight & CG
LAT-MD-01598
E. Gawehn
L. Wai
LAT Dynamics Test Plan
LAT-MD-01196
Y Ismael
M. Lovellette
Dynamics Tests
LAT-MD-01836
E. Gawehn
M. Lovellette
L Sine Vibe
PDU
LAT Contamination Control
LAT-MD-00404
Plan
J. Cullinan
E. Gawehn
M-GSE
E. Gawehn LAT-MD-01462
Mechanical S/S
Test Plan
LAT-SS-00493
Delivery
LAT Mechanical Integration
LAT-PS-00676
E. Gawehn
Component
Aliveness Tests
EMI/EMC
M Survey
LAT Handling
&Transportation Plan
LAT-MD-00452
LAT-MD-00649
LAT Integration & Test Plan
LAT-MD-01376
E. Bloom
L. Wai
ACD-PLAN-000050
L
Survey
EP
Observatory
Integration
LAT Instrument Performance
Verification Plan
LAT-MD-00408
Electrical Performance Tests
LAT-MD-01055
L. Wai
Thermal Tests
LAT-MD-01837
E. Gawehn
M. Lovellette
LAT Thermal Test Plan
LAT-MD-01600
M. Lovellette
J. Wang
LAT EMI Tests
LAT-MD-01838
LAT EMI/EMC Test Plan
No Number
M. Lovellette
T. Leisgang
M. Lovellette
C
Integrate X-LAT
X-LAT Plate
L
E
Electrical
InterfaceTests
C
Radiator FitCHeck
Radiators
A
Aliveness
Tests
F
SVAC Plan
LAT-MD-00446
E. Do Couto E Silva
S. Ritz
Particle Test Plan
LAT-MD-00440
G. Godfrey
M
Ship to
SA
Functional
Tests
Survey:
GASU
Pre-Ship
Survey
O Survey
LAT SVAC Test Plan
LAT-MD-01587
E. do Couto E Silva
O
L
Optical
M
Limited
Performance
C
Comprehensive
Performance
Test Plan Flow
Muon
v CDR 3/14/03
Document: LAT-PR-01779-01
Section 5 - Page 34
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
LAT Thermal Balance/Thermal-Vacuum Tests
•
•
Test goals
– Thermal-Balance
• Verify that the LAT thermal control system is properly sized to keep maximum
temperatures within mission limits, while demonstrating at least 30% control margin
• Validate the LAT thermal control system control algorithms
• Verify that the VCHP control effectively closes the radiator to when the LAT is off
• Validate the LAT thermal model by correlating predicted and measured temperatures
– Thermal-Vacuum
• Verify the LAT’s ability to survive proto-qualification temperature levels at both the
high and low end
• Test for workmanship on hardware such as wiring harnesses, MLI, and cable support
and strain-reliefs which will not have been fully verified at the subsystem level
• Demonstrate that the LAT meets performance goals at temperature
• Provide stable test environment to complete LAT surveys, as detailed in LAT-MD00895, “LAT Instrument Survey Plan”
Configuration
– The LAT instrument will be fully integrated but the SC solar arrays will not be installed
– The LAT will be powered on and off during testing per the test procedure
– The LAT will be oriented with the Z-axis parallel to the ground to allow all heatpipes to
operate and the +X axis facing up
– All MLI blanketing will be in its flight configuration for the duration of the 2 tests
– The LAT will NOT be reconfigured after the thermal-balance test
Source: LAT-MD-01600-01, “LAT Thermal-Vacuum Test Plan,” March 2003
Document: LAT-PR-01779-01
Section 5 - Page 35
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
LAT Thermal Balance/Thermal-Vacuum Tests
•
•
Instrumentation
– Thermocouples and RTD’s will be used to instrument the LAT and test chamber
– LAT flight housekeeping instrumentation includes many thermistors and RTD’s.
These will also be used for monitoring temperatures within the LAT
Specialized test equipment requirements
– Chamber pressure of < 1 x 10-5 Torr
– Chamber cold wall temperature of –180 oC to provide a cold sink for accumulation of
contaminants
– Thermally controlled surfaces in the chamber
• 5 plates for ACD surfaces, each individually controlled
• 2 plates for the radiators(one for each side), each individually controlled
• 1 plate to simulate the bus, controlling the environment to the X-LAT Plate and
the back of each radiator
– Heat exchangers mounted on the + / – X sides of the LAT Grid, to increase ramp rate
during transitions
– LAT heat pipes will be leveled to within 0.2 degrees
– 20 degC/hr max ramp rate
– Facility capable of holding LAT stable to < 2 oC/hr rate of change (TBR)
– Handling fixture to allow the transition from acoustic test to TVAC without breaking
radiator configuration
Source: LAT-MD-01600-01, “LAT Thermal-Vacuum Test Plan,” March 2003
Document: LAT-PR-01779-01
Section 5 - Page 36
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
LAT Thermal Balance/Thermal-Vacuum Test Profile
• Dwell at high and low temps for 12 hours, min
• Limited Performance Tests conducted during transitions
• Comprehensive Performance Tests (C)
– CPT test regime performed at ambient, during cold and hot
soaks, and at return to ambient
• Limited Performance Tests (L)
– LPT test regime performed as indicated. Operating modes
will be checked and units will be monitored for failure and
intermittent operation
Source: LAT-MD-01600-01, “LAT Thermal-Vacuum Test Plan,” March 2003
Document: LAT-PR-01779-01
Section 5 - Page 37
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
LAT Thermal Balance/Thermal-Vacuum Test Profile
Hot QT
Bake Out
CPT
CPT
LPT
LPT
CPT
Hot QT
LAT Off
Hot T- Bal
LAT Off
LAT On
Muon Survey
Warm-up
Repress
Pump-Down
Muon Survey
CPT
CPT
Cold Surv
T-Bal
Cold
QT
Cold T-Bal
1
2
3
4
Muon Survey
LAT On
LPT
LPT
CPT
Cold Start
T-Bal
Ambient Pressure, Temp
T-Vac Cycles
Pressure < 1x 10-5 Torr
LAT Thermal-Vacuum Test Profile
Source: LAT-MD-01600-01, “LAT Thermal-Vacuum Test Plan,” March 2003
Document: LAT-PR-01779-01
Section 5 - Page 38
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
Thermal Test Facility
•
NRL Naval Center for
Space Technology
A59 facility
•
Cryopumped chamber
•
16’ diameter x 30’ long
•
Support 200-300
thermocouples, ~400
other circuits
Document: LAT-PR-01779-01
Section 5 - Page 39
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
LAT Airplane Test (TBR)
• Expose the LAT to charged particle fluxes similar to those in
orbit. Do an End-to-End test of the LAT in as close to orbital
environment as practical. This test is for risk reduction.
– Demonstrate the complete LAT system functionality at inorbit cosmic rates and higher. See LAT-TD-00550 “LAT Test
Plan for Airplane”. Constitutes an end-to-end test of the
LAT.
• General hardware tests for the complete LAT system at high
particle rate:
– Verify DAQ operation at estimated orbital rates.
– Verify event quality.
– Verify trigger functionality in the various trigger modes at
estimated orbital rates. (Much higher than ground cosmic
rays).
– Measure livetime in the various trigger modes as
determined by LAT hardware.
Document: LAT-PR-01779-01
Section 5 - Page 40
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
EXTRA SLIDE
Document: LAT-PR-01779-01
Section 5 - Page 41
GLAST LAT Project
Integration and Test CDR Peer Review, March 28, 2003
Pass/Fail Criteria
•
•
•
•
•
Modal Survey:
– Successful correlation of dynamics model
EMI/EMC:
– Emissions for the LAT below required levels Susceptibility: LAT
does not exhibit susceptibility when exposed to required levels
Sine vibe:
– No change in modal frequencies
– LAT functions properly post test
Thermal Balance:
– successful correlation of thermal model
Thermal vacuum testing:
– Verify ability to operate successfully over required temperature
range
– Successful completion of performance tests
– Successful completion of cosmic ray muon survey
Document: LAT-PR-01779-01
Section 5 - Page 42