Abstract With an increase in the use of small, modular, resource-limited satellites for Earth orbiting applications, the benefit to be had from a model-based architecture that rapidly searches the mission trade-space and identifies near-optimal designs is greater than ever. This work presents an architecture that identifies trends between conflicting objectives (e.g. lifecycle cost and performance) and decision variables (e.g. orbit altitude and inclination) such that informed assessment can be made as to which design/s to take on for further analysis. The models within the architecture exploit analytic methods where possible, in order avoid computationally expensive numerical propagation, and achieve rapid convergence. Two mission cases are studied; the first is an Earth observation satellite and presents a trade-off between ground sample distance and revisit time over a ground target, given altitude as the decision variable. The second is a satellite with a generic scientific payload and shows a more involved trade-off, between data return to a ground station and cost of the mission, given variations in the orbit altitude, inclination and ground station latitude. Results of each case are presented graphically and it is clear that non-intuitive results are captured that would typically be missed using traditional, point-design methods, where only discrete scenarios are examined.
Highlights A methodology for rapid evaluation of single-agent cubesat mission performance. Model-based approach for a generalized architecture. Long-term averaging analytics exploited to enable rapid assessment. Pareto sets obtained through application of multi-objective genetic algorithm. Two case studies analyzed – Earth observation system and scientific payload system.
Rapid model-based inter-disciplinary design of a CubeSat mission
Acta Astronautica ; 105 , 1 ; 321-332
2014-10-02
12 pages
Article (Journal)
Electronic Resource
English
AEOLDOS , Aerodynamic End Of Life De-Orbit System , DoD , Depth of Discharge , ELaNa , Educational Launch of Nano-satellites , EO , Earth Observation , GS , Ground Station , GSD , Ground Sample Distance , LEO , Low Earth Orbit , MOGA , Multi-Objective Genetic Algorithm , NEXT , NASA Launch Services Enabling eXploration & Technology , NSGA , Non-dominated Sorting Genetic Algorithm , OTS , Off the Shelf , PPD , Passes per Day , UHF , Ultra High Frequency , VHF , Very High Frequency , CubeSat , Mission , Optimization , Mbse , Trade-space
Rapid model-based inter-disciplinary design of a CubeSat mission
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