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Proceedings Paper

International Space Station Alpha electric power system performance degradation
Author(s): Cheng-Yi Lu; Lisa Hague; Vidya Padhye; Robert Hill
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Paper Abstract

Performance of the International Space Station Alpha (ISSA) United States On-Orbit Segment (USOS) Electric Power System (EPS) will be degraded through the mission life of the station. The power generation photovoltaic array and thermal control radiator will be directly exposed to the natural environment and the environment induced after the station is built. These environmental effects result in lower array current and voltage output as well as lower radiator heat rejection capability. Aging is the major cause for the energy storage nickel-hydrogen (NiH2) battery performance degradation. Over time, there is an increase in the internal impedance, which results in a decreased efficiency as the battery ages. Design of the ISSA EPS takes into consideration the various equipment degradation modes, to make it compatible with the environments and to meet power, lifetime, and performance requirements.

Paper Details

Date Published: 7 July 1995
PDF: 10 pages
Proc. SPIE 2455, Nondestructive Evaluation of Aging Aircraft, Airports, Aerospace Hardware, and Materials, (7 July 1995); doi: 10.1117/12.213560
Show Author Affiliations
Cheng-Yi Lu, Rockwell International Corp./Rocketdyne Div. (United States)
Lisa Hague, Rockwell International Corp./Rocketdyne Div. (United States)
Vidya Padhye, Rockwell International Corp./Rocketdyne Div. (United States)
Robert Hill, Rockwell International Corp./Rocketdyne Div. (United States)


Published in SPIE Proceedings Vol. 2455:
Nondestructive Evaluation of Aging Aircraft, Airports, Aerospace Hardware, and Materials
Tobey M. Cordell; Raymond D. Rempt, Editor(s)

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