TVT Interfaces for TTPD

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TVT Interfaces for T/TPD U/UPD at NSPO
AMS-02

• Presented by
• Chia-Ray (Steven) Chen
• Jih-Run (J. R.) Tsai
• National Space Program Office
• March 2, 2005

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Content

• Thermal Vacuum Test Facility
• Temperature Profile
• Test Interfaces
• Required Information
• Test Window Arrangement

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Thermal Vacuum Test Facility

• Small Thermal Vacuum Chamber
• working volume 1.5m x 1.5m
• shrouds -196oC, -173oC 127oC
• thermal baseplate 1m x 1.25m, -60oC 100oC,
  100kg loading capacity with 2g requirement

Thermal baseplate
STVC
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Temperature Profile

Temperature (Proto-flight Test Level)
Pump Down
Thermal Balance Phase
Return To Ambient
Thermal Cycling Phase


Chamber Environments Pressure?1.0x10-5 mbar



Hot non-operation (85oC)
1 hr
2 hrs Hot soak
2 hrs Hot soak
1 hr
1 hr
Hot Operation (55oC)
Transient Cool-Down
Hot Balance
Ambient
Cold Balance
Cold Operation (-25oC)
Operation (on)
2 hrs cold soak
2 hrs cold soak
Non-operation (off)
Cold non-operation (-45oC)
1 hr
1 hr
1 hr
1 hr
Turn on
Turn off
I
A
B
C
D
E
F
G
H
J
K
L
O
Q
M
N
P
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Test Interfaces Flight Configuration
Wake Radiator
Ram Radiator
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Test Interfaces Test Configuration

• Electronic crates are suggested to be separated
  from their power boxes according to the flight
  configuration.
• The dimensions of crates will be updated when
  engineering drawings are received.

1.25 m
1.25 m
31.3 cm
31.3 cm
20.4 cm
20.0 cm
1 m
34.2 cm
T
1 m
U
23.7 cm
TPD
UPD
40.3 cm
27.5 cm
Test adapter
Test adapter
Thermal baseplate
STVC door (feedthroughs)
STVC door (feedthroughs)
Thermal baseplate
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Test Interfaces Electrical

• Four 55 pins of feedthroughs (95-44 CD951 B07H
  22-55PS) will be used for electrical signals and
  two 24 pins of feedthroughs (DM5623-37-2-PP) for
  power. ---- Reserved for T/TPD and U/UPD
• NSPO will use three 24 pins of feedthroughs
  (DM5623-37-2-PP) for heater and seven 37 pins of
  feedthroughs (DM5623-37-37-PP) for thermocouples.
• Is there any EGSE box inside small thermal vacuum
  chamber (STVC)? gt TFS UFS? Power
  dissipations? Temperature range? Vacuum
  approved?
• Corona issue for T/TPD/U/UPD?

DM5623-37-2-PP
DM5623-37-37-PP
95-44 CD951 B07H 22-55PS
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Test Interfaces Mechanical

• Test adapter will be prepared by NSPO to simulate
  AMS-02 radiator panel during Crates TV test. Test
  heaters and thermocouples will be installed on
  test adapter for precise temperature control. gt
  Engineering Drawings are required.
• Cho-Therm will be used between crates and test
  adapter to simulate thermal coupling of flight
  condition.
• Is there any MGSE required for TV tests?

crate
Cho-Therm
screws
Test adapter
thermal baseplate
Cho-Therm (enhanced thermal control)
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Test Interfaces Thermal

• Test heaters and thermocouples will be installed
  on thermal baseplate, test adapter, crate inside
  and outside to control and monitor temperature
  variations during test.
• Locations of test thermocouples inside and
  outside crates will be decided by NSPO (with
  comments from CGS, MIT, and CSIST) based on test
  prediction results including interfaces of PCBs
  and case.
• Thermocouple locations on chips or parts will be
  decided by crate design engineers before test
  preparations.

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Test Interfaces Thermal (Continued)

• Test thermocouples will be installed on the hot
  zones of T crate and TPD.
• Will all PCBs be turned on all the time?
• Are the power dissipations correct?

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Test Interfaces Thermal (Continued)

• Test thermocouples will be installed on the hot
  zones of U crate and UPD.
• Will all PCBs be turned on all the time?
• Are the power dissipations correct?

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Test Interfaces Test Area

• STVC and TDHSHCS are located in test high bay,
  but remotely controlled in TVC control room.
  (facility team)
• Thermal engineers will use real-time monitoring
  system in TV test checkout room to trace
  temperature control. (thermal team)
• AMS-02 test engineers will reside at TV test
  checkout room. (crate test team)

STVC
TDHSHCS
IT Highbay
20m
Trench (signal and power cables)
thermal and crate test teams
TV test checkout room
TVC control room
facility team
20m
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Required Information

• Test requirements
• Any change on test requirements?
• Pre-test predictions
• Thermal models for T, TPD, U, and UPD were
  received from CGS recently, and need to be
  reviewed and discussed.
• Compared with J crate, is there any change on T
  and U crate mechanics besides the number of
  slots? If yes, the updated parameters should be
  provided.
• Updated power dissipations if any
• Delivered items needed (2 months before test)
• Engineering drawings for T, TPD, U, and UPD
• Electrical test procedures
• Material lists and outgassing data (including
  EGSE boxes)
• Lists of crate test engineers and their personal
  information

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Test Window Arrangement

• Possible test window is allocated for AMS-02
  crates thermal vacuum tests by using NSPO test
  facility as follows

Some FORMOSAT-3 AIT activities may be conducted
in this window.
01/01/2005
06/15/2005
9/30/2005
12/30/2005
ROCSAT-3 launch preps. flight operation
FORMOSAT-3 AIT
Possible window