High fidelity multi-objective design optimization of a downscaled cusped field thruster

Thomas Fahey, Angus Muffatti, Hideaki Ogawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

There is a clear demand for advanced electric propulsion systems for current and future satellite applications for a variety of commercial and research missions to reduce launch costs. The HEMP-T/CFT propulsion systems are very complex and require a detailed analysis of how design criteria influence performance. By downscaling the CFT, further propellant and system reductions would result in lower costs while maintaining high performance. The CFT concept has demonstrated significantly improved performance over the HET and GIT, however little is understood about the complexities of the interactions and interdependencies of the geometrical, magnetic and ion beam properties of the thruster. This study applies an advanced design methodology combining a modified power distribution calculation and evolutionary algorithms assisted by surrogate modeling to a multi-objective optimization for the performance optimization and characterization of the CFT. Optimization is performed for maximization of performance defined by 5 design parameters (i.e., Φa, Ia, ma, and magnet radii), simultaneously aiming to maximize 3 objectives, that is, thrust, efficiency and specific impulse. Statistical methods based on global sensitivity analysis are employed to assess the optimization results in conjunction with surrogate models to identify key design factors with respect to the 3 design objectives and additional performance measures. Significant effects of the anode power and magnet radii have been observed on the considered design criteria with the anode current exhibiting the most significant degree of influence on all 3 objectives. Several optimum design points were analyzed and one has demonstrated the most comprehensive advantages in important design criteria.

Original languageEnglish
Title of host publication68th International Astronautical Congress, IAC 2017
Subtitle of host publicationUnlocking Imagination, Fostering Innovation and Strengthening Security
PublisherInternational Astronautical Federation, IAF
Pages1141-1152
Number of pages12
ISBN (Print)9781510855373
Publication statusPublished - Jan 1 2017
Externally publishedYes
Event68th International Astronautical Congress: Unlocking Imagination, Fostering Innovation and Strengthening Security, IAC 2017 - Adelaide, Australia
Duration: Sep 25 2017Sep 29 2017

Publication series

NameProceedings of the International Astronautical Congress, IAC
Volume2
ISSN (Print)0074-1795

Other

Other68th International Astronautical Congress: Unlocking Imagination, Fostering Innovation and Strengthening Security, IAC 2017
CountryAustralia
CityAdelaide
Period9/25/179/29/17

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All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Fahey, T., Muffatti, A., & Ogawa, H. (2017). High fidelity multi-objective design optimization of a downscaled cusped field thruster. In 68th International Astronautical Congress, IAC 2017: Unlocking Imagination, Fostering Innovation and Strengthening Security (pp. 1141-1152). (Proceedings of the International Astronautical Congress, IAC; Vol. 2). International Astronautical Federation, IAF.