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JPL thermal design modeling philosophy and NASA-STD-7009 Standard for models and simulations – a case study

Show simple item record Avila, Arturo 2012-07-12T22:02:12Z 2012-07-12T22:02:12Z 2011-07-18
dc.identifier.citation 41st International Conference on Environmental Systems (ICES) Portland, Oregon, July 17-21, 2011 en_US
dc.identifier.clearanceno 11-2415
dc.description.abstract The Standard JPL thermal engineering practice prescribes worst-case methodologies for design. In this process, environmental and key uncertain thermal parameters (e.g., thermal blanket performance, interface conductance, optical properties) are stacked in a worst case fashion to yield the most hot- or cold-biased temperature. Thus, these simulations would represent the upper and lower bounds. This, effectively, represents JPL thermal design margin philosophy. Uncertainty in the margins and the absolute temperatures is usually estimated by sensitivity analyses and/or by comparing the worst-case results with “expected” results. Applicability of the analytical model for specific design purposes along with any temperature requirement violations are documented in peer and project design review material. In 2008, NASA released NASA-STD-7009, Standard for Models and Simulations. The scope of this standard covers the development and maintenance of models, the operation of simulations, the analysis of the results, training, recommended practices, the assessment of the Modeling and Simulation (M&S) credibility, and the reporting of the M&S results. The Mars Exploration Rover (MER) project thermal control system M&S activity was chosen as a case study determining whether JPL practice is in line with the standard and to identify areas of non-compliance. This paper summarizes the results and makes recommendations regarding the application of this standard to JPL thermal M&S practices. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2011. en_US
dc.subject thermal blanket performance en_US
dc.subject interface conductance en_US
dc.subject optical properties en_US
dc.title JPL thermal design modeling philosophy and NASA-STD-7009 Standard for models and simulations – a case study en_US
dc.type Preprint en_US
dc.subject.NASATaxonomy Spacecraft Design, Testing and Performance en_US

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