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RESEARCH PAPERS

On Protection of Freedom’s Solar Dynamic Radiator From the Orbital Debris Environment: Part II—Further Testing and Analysis

[+] Author and Article Information
Jennifer L. Rhatigan

National Aeronautics and Space Administration, Lewis Research Center, Cleveland, OH 44135

Eric L. Christiansen

National Aeronautics and Space Administration, Lyndon B. Johnson Space Center, Houston, TX 77058

Michael L. Fleming

LTV Missiles and Electronics Corporation, Dallas, TX 75265

J. Sol. Energy Eng 114(3), 142-149 (Aug 01, 1992) (8 pages) doi:10.1115/1.2929997 History: Received August 01, 1991; Revised April 21, 1992; Online June 06, 2008

Abstract

Recent progress to better understand the environmental threat of micrometeoroid and space debris to the solar dynamic radiator for the Space Station Freedom power system is reported. The objective was to define a design which would perform to survivability requirements over the expected lifetime of the radiator. A previous paper described the approach developed to assess on-orbit survivability of the solar dynamic radiator due to micrometeoroid and space debris impacts. Preliminary analyses were presented to quantify the solar dynamic radiator survivability. These included the type of particle and particle population expected to defeat the radiator bumpering. Results of preliminary hypervelocity impact (HVI) testing performed on radiator panel samples were also presented. This paper presents results of a more extensive test program undertaken to further define the response of the solar dynamic radiator to HVI. Tests were conducted on representative radiator panels (under ambient, nonoperating conditions) over a range of particle size, particle density, impact angle, and impact velocity. Target parameters were also varied. Data indicate that analytical penetration predictions are conservative (i.e., pessimistic) for the specific configuration of the solar dynamic radiator. Test results are used to define more rigorously the solar dynamic radiator reliability with respect to HVI. Test data, analyses, and survivability results are presented.

Copyright © 1992 by The American Society of Mechanical Engineers
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