Alpha Magnetic Spectrometer AMS 02 Structural Testing Overview

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Alpha Magnetic Spectrometer (AMS) - 02
Structural Testing Overview

• Hsing Ju
• April 11-15, 2005

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Frequency Strength Verification Testing

• Dynamic Tests
• Cryomagnet System Sine Sweep Tests (INFN)
• Cryomagnet STA (STA VC, STA SFHe Tank, Cold Mass
  Replica) will be tested in a sine sweep test in
  order to excite the non-linear support straps to
  load levels so that the strap reaches and extends
  into the stiffness region associated with the
  launch strap engagement
• Input environment will be developed using
  non-linear DCLA results. The Cryomagnet system
  response will be analytically determined and
  reproduced during testing.
• Test will be performed with the system at
  cryogenic temperatures
• Will include enough instrumentation to
  dynamically correlate nonlinear response of the
  FEM

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Frequency Strength Verification Testing
STA Cryosystem in the Vacuum Case Test Fixture
(VCTF)
VCTF
Cryomagnet STA
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Frequency Strength Verification Testing
Existing hardware at INFN in Perugia, Italy
TEAM Slip Table
Ling Shaker
Riser Base
System Base
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Frequency Strength Verification Testing
STA Sine Sweep Test X-Y Configuration
VCTF
X-Y Transition Frame
Team Spherical Coupling (Supplied by NASA/JS)
Cryomagnet STA
Riser Base
Ling Shaker
TEAM Slip Table
System Base
Spacer Block/Structure
System Base Extension
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Frequency Strength Verification Testing
STA Sine Sweep Test Z Configuration
VCTF
Z Transition Frame
Team Spherical Coupling (Supplied by NASA/JS)
Cryomagnet STA
Riser Base
Ling Shaker (Supplied by INFN)
TEAM Slip Table
System Base
Spacer Block/Structure
System Base Extension
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Frequency Strength Verification Testing

• Acoustic Tests
• Cryomagnet System (ESTEC The Netherlands)
• Cryomagnet Structural Test Article (STA)
• STA Vacuum Case
• STA Cryosystem including STA SFHe Tank,
• Cold Mass Replica
• The Cryomagnet STA will be tested to launch
  acoustic levels to determine if there is any
  o-ring seal leakage.
• Test levels will be payload bay acoustic
  environment as defined per NSTS-21000-IDD-ISS.
• Test must be performed with cryosystem at room
  temperature and vacuum in order to measure leaks
  in the o-ring seals.
• Strap preload increased to simulate thermal load
  of Cold Mass Replica.

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Frequency Strength Verification Testing
Acoustic Test Layout
Cryomagnet STA
Support Stands
Acoustic Test Stand (Supplied by ESTEC)
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Frequency Strength Verification Testing

• Modal Tests
• Full Assembly Modal Test (IABG)
• Orbiter Configuration simulated with modified
  test stands from AMS-01 on STS-91 or IABG Shuttle
  Payload Simulator.
• Test will be performed with the system at
  cryogenic temperatures.
• Will include enough instrumentation to
  dynamically correlate linear response of the FEM.
• Instrumentation Test Equipment
• 400-500 accelerometers
• TBD small 0.25g actuators
• Smart Hammer

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Frequency Strength Verification Testing
Modal Test Layout
Setup shown for JSC Structures Test Lab
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Static Verification Testing

• Full Assembly Static Test (IABG)
• Orbiter Configuration simulated with modified
  test stands from AMS-01 on STS-91 or IABG Shuttle
  Payload Simulator.
• Test to 1.1 x limit load.
• Will include enough instrumentation to statically
  correlate FEM to 1.4 x limit load.
• Instrumentation Test Equipment
• 250-300 strain gages
• 2-3 large actuators
• 50,000-90,000 lbf (220-400 kN)
• Maximum stroke of 4-5 inches

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Static Verification Testing
Full Assembly Static Test
Setup shown for JSC Structures Test Lab
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Forward Work

• Cryomagnet System Sine Sweep Test
• Meeting April 18th at INFN in Italy
• Clarify information based on current design.
• Full Assembly Static/Modal Test
• Meeting April 20th at IABG in Germany
• General information meeting.