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Fault protection design and testing for the Cassini spacecraft in a “mixed” thruster configuration

Show simple item record Bates, David Lee, Allan Meakin, Peter Weitl, Raquel 2014-02-21T17:38:10Z 2014-02-21T17:38:10Z 2013-08-19
dc.identifier.citation AIAA Guidance, Navigation, and Control Conference and Conference, Boston, Massachussetts, August 19-22, 2013 en_US
dc.identifier.clearanceno CL#13-2607
dc.description.abstract NASA’s Cassini Spacecraft, launched on October 15th, 1997 and arrived at Saturn on June 30th, 2004, is the largest and most ambitious interplanetary spacecraft in history. In order to meet the challenging attitude control and navigation requirements of the orbit profile at Saturn, Cassini is equipped with a monopropellant thruster based Reaction Control System (RCS), a bipropellant Main Engine Assembly (MEA) and a Reaction Wheel Assembly (RWA). In 2008, after 11 years of reliable service, several RCS thrusters began to show signs of end of life degradation, which led the operations team to successfully perform the swap from the A-branch to the B-branch RCS system. If similar degradation begins to occur on any of the B-branch thrusters, Cassini might have to assume a “mixed” thruster configuration, where a subset of both A and B branch thrusters will be designated as prime. The Cassini Fault Protection FSW was recently updated to handle this scenario. The design, implementation, and testing of this update is described in this paper. 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, 2013 en_US
dc.subject Titan 4B en_US
dc.subject propellant en_US
dc.subject flybys en_US
dc.subject Main Engine Assembly (MEA) en_US
dc.subject Reaction Control System (RCS) en_US
dc.subject Reaction Wheel Assembly (RWA) en_US
dc.title Fault protection design and testing for the Cassini spacecraft in a “mixed” thruster configuration en_US
dc.type Preprint en_US

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