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AMS-02 Thermal Analysis. Overview. Extensive thermal modeling and analyses have been performed on AMS-02. Analyses are performed on an integrated system level as well as more detail sub-system and component levels. Organization.

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AMS-02 Thermal Analysis


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ams 02 thermal analysis
AMS-02 Thermal Analysis

AMS-02 Phase II Safety Review

overview
Overview
  • Extensive thermal modeling and analyses have been performed on AMS-02.
  • Analyses are performed on an integrated system level as well as more detail sub-system and component levels.

AMS-02 Phase II Safety Review

organization
Organization
  • Carlo Gavazzi Space (CGS) has overall responsibility for system level design and analysis
  • AMS-02 Thermal Working Group (TWG) provides oversight and review for all thermal activities
    • TWG includes NASA, ESCG, and AMS Collaboration members
  • Sub-detector teams are responsible for their own thermal design and analysis

AMS-02 Phase II Safety Review

system level analyses
System Level Analyses
  • Top Level analyses are performed using a “reduced” AMS-02 model integrated with an ISS or Orbiter model
  • System level analyses are performed both at CGS/Milan and at ESCG.
  • SINDA/FLUINT, TSS and Thermal Desktop used for thermal analyses

AMS-02 Phase II Safety Review

ams 02 on iss tss
AMS-02 on ISS(TSS)

AMS-02

AMS-02 Phase II Safety Review

ams 02 on iss s3 truss tss
AMS-02 on ISS S3 Truss(TSS)

AMS-02 Phase II Safety Review

ams 02 geometry model thermal desktop
AMS-02 Geometry Model (Thermal Desktop)

AMS-02 Phase II Safety Review

system level models
System Level Models
  • Used for survey to determine extreme cases
  • Used to directly analyze many subsystems
  • Used to provide interface data for detailed subsystem models

AMS-02 Phase II Safety Review

subsystem analyses
Subsystem Analyses
  • System level model includes reduced (lower fidelity) models for several subsystems.
  • CGS provides thermal interface data to subsystem analysts for detailed analyses.
  • Comparison of results and iterations between system level and subsystems assure validity of interface data.

AMS-02 Phase II Safety Review

attitude survey
Attitude Survey
  • A survey of possible ISS attitudes was performed to determine extreme cases for all AMS-02 subsystems
  • Survey accounted for entire range of solar beta angles (-75º to +75º)
  • Possible ISS attitudes considered:
    • Roll = +/-15º
    • Yaw = +/-15º
    • Pitch = -20º to +15º (0º to +25º when orbiter docked)
  • Altitudes from +150 to 270 nmi

AMS-02 Phase II Safety Review

attitude survey continued
Attitude Survey (continued)
  • 256 survey cases considered
  • Results were screened to determine extreme cases for AMS-02 components
  • All extreme cases were re-run using additional analytical detail and extreme hot or cold natural environments.

AMS-02 Phase II Safety Review

hot cold environments per ssp 57003
Hot & Cold Environments(per SSP 57003)

AMS-02 Phase II Safety Review

additional analyses considered
Additional Analyses Considered
  • In Payload Bay (undocked)
  • In Payload Bay (docked to ISS)
  • Transfer (between STS & ISS)
  • On ISS unpowered (8 hours for mission success, continuous for safety)

AMS-02 Phase II Safety Review

special cases considered
Special Cases Considered
  • Potential freezing of fluid systems
    • TTCS (ESCG-4470-06-TEAN-DOC-0032)
    • TRDGB (ESCG-4470-06-TEAN-DOC-0086)
  • EVA Touch Temperature
    • ESCG-4470-07-TEAN-DOC-0033
  • Analysis of heaters with two failures
    • AMS02-TN-CGS-007, Issue 2

AMS-02 Phase II Safety Review

special cases continued
Special Cases (continued)
  • Magnet charging/discharging
  • Auto-ignition evaluation (pending)
  • Stuck open vent door evaluation (pending)

AMS-02 Phase II Safety Review