Thermal design verification testing of the Clementine spacecraft: Quick, cheap, and useful

Details Thermal design verification testing of the Clementine spacecraft: Quick, cheap, and useful Thermal design verification testing of the Clementine spacecraft: Quick, cheap, and useful

Nov 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994nascp3280..255k&link_type=abstract

In NASA. Goddard Space Flight Center, Eighteenth Space Simulation Conference: Space Mission Success Through Testing p 255 (SEE N

Computer Science

Performance

Control Systems Design, Environment Models, Experiment Design, Low Cost, Mathematical Models, Space Environment Simulation, Spacecraft Temperature, Thermal Analysis, Thermal Vacuum Tests, Asteroids, Checkout, Heat Pipes, Heaters, Schedules, Telemetry, Temperature Control

Scientific paper

At this writing, Clementine had successfully fulfilled its moon-mapping mission; at this reading it will have also, with continued good fortune, taken a close look at the asteroid Geographos. The thermal design that made all this possible was indeed formidable in many respects, with very high ratios of requirements-to-available resources and performance-to-cost and mass. There was no question that a test verification of this quite unique and complex design was essential, but it had to be squeezed into an unyielding schedule and executed with bare-bones cost and manpower. After describing the thermal control subsystem's features, we report all the drama, close-calls, and cost-cutting, how objectives were achieved under severe handicap but (thankfully) with little management and documentation interference. Topics include the newly refurbished chamber (ready just in time), the reality level of the engineering model, using the analytical thermal model, the manner of environment simulation, the hand-scratched film heaters, functioning of all three types of heat pipes (but not all heat pipes), and the BMDO sensors' checkout through the chamber window. Test results revealed some surprises and much valuable data, resulting in thermal model and flight hardware refinements. We conclude with the level of correlation between predictions and both test temperatures and flight telemetry.

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