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Case Study of Risk Mitigation Based on Hardware/Software Integration (HSI) Testing for the International Space Station (ISS) Node 2 ModuleWithin the pressurized elements of the International Space Station (ISS), requirements exist to ensure a safe, habitable environment for the crew. In order to provide this environment, thermal control components work in conjunction with software controls to provide heat rejection for subsystem avionics equipment, for the environmental control system and for experiment payloads. It is essential to ISS operations, mission success and crew safety that necessary testing incorporates the extreme conditions to ensure proper performance. This paper provides a general description and methodology applied to thermal related Hardware/Software Integration (HSI) tests for the ISS Node 2 module. A detailed test plan was developed and implemented with two objectives: the first was for risk mitigation of the thermal control algorithms and software qualification, and the second was for data collection which will substantiate thermalhydraulic models of the Internal Active Thermal Control System (IATCS). Analytical models are utilized to determine on-orbit performance for conditions and scenarios where the simulation of actual on-orbit system performance is limited by test configuration constraints. Node 2 IATCS HSI activities were performed at the Alenia Spazio facility in Torino, Italy with participation from the National Aeronautics and Space Administration (NASA), Alenia Spazio, Jacobs Engineering Sverdrup (JE Sverdrup) and Boeing.
Document ID
20040082379
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Holt, James Mike
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Clanton, Stephen Edward
(Sverdrup Technology, Inc. Huntsville, AL, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2004
Subject Category
Spacecraft Design, Testing And Performance
Meeting Information
Meeting: French Aviation and Space Association Complex and Safe Systems Engineering Conference
Location: Paris
Country: France
Start Date: June 21, 2004
End Date: June 22, 2004
Funding Number(s)
CONTRACT_GRANT: NAS8-00187
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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