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Expected Thrust Fraction: Resilient Trajectory Design Applied to the Earth Return Orbiter

Show simple item record Rubinsztejn, Ari Sood, Rohan Laipert, Frank 2022-03-16T02:52:17Z 2022-03-16T02:52:17Z 2021-01-31
dc.identifier.citation 31st AAS/AIAA Space Flight Mechanics Meeting, Charlotte, North Carolina, January 31 - February 4, 2021
dc.identifier.clearanceno CL#21-0795
dc.description.abstract Electric propulsion is an enabling technology for NASA’s Mars Sample Return mission that affords an order of magnitude reduction in fuel. Unfortunately, elec- tric propulsion’s low-thrust capabilities require long thrusting arcs that make space- craft susceptible to disturbances resulting in missed thrust events. One method for designing trajectories resilient to such missed thrust events is expected thrust frac- tion, which embeds their stochastic nature into a time-varying duty cycle. This paper investigates the application of expected thrust fraction to the Earth Return Orbiter’s outbound Earth-to-Mars trajectory and compares it with trajectories de- signed using traditional methods to mitigate missed thrust events. Through the use of expected thrust fraction, a trajectory with a baseline 65.4% success rate is im- proved to an 86.6% success rate at the cost of only a 12 kg reduction in delivered mass. Additionally, when expected thrust fraction is used in conjunction with a terminal coast, a 96.0% success rate is achieved, which is higher than any single mitigation technique.
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US
dc.publisher Pasadena, CA: Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2021
dc.title Expected Thrust Fraction: Resilient Trajectory Design Applied to the Earth Return Orbiter
dc.type Preprint

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