Integrated Failure Detection and Management for the Space Station Freedom External Active Thermal Control System

Paper #:
  • 932149

Published:
  • 1993-07-01
Citation:
Mesloh, N., Hill, T., and Kosyk, K., "Integrated Failure Detection and Management for the Space Station Freedom External Active Thermal Control System," SAE Technical Paper 932149, 1993, https://doi.org/10.4271/932149.
Pages:
8
Abstract:
This paper presents the integrated approach toward failure detection, isolation, and recovery/reconfiguration to be used for the Space Station Freedom External Active Thermal Control System (EATCS). The on-board and on-ground diagnostic capabilities of the EATCS are discussed. Time and safety critical failures, as well as noncritical failures, and the detection coverage for each provided by existing capabilities are reviewed. The allocation of responsibility between onboard software and ground-based systems, to be shown during ground testing at the Johnson Space Center, is described. Failure isolation capabilities allocated to the ground include some functionality originally found on orbit but moved to the ground to reduce on-board resource requirements. Complex failures requiring the analysis of multiple external variables, such as environmental conditions, heat loads, or station attitude, are also allocated to ground personnel.
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