Design of robust ballistic landings on the secondary of a binary asteroid
Fodde, Iosto and Feng, Jinglang and Vasile, Massimiliano and Gil-Fernández, Jesús (2024) Design of robust ballistic landings on the secondary of a binary asteroid. Journal of Guidance, Control, and Dynamics, 47 (10). pp. 2041-2057. ISSN 1533-3884 (https://doi.org/10.2514/1.g007786)
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Abstract
ESA’s Hera mission aims to visit binary asteroid Didymos in late 2026, investigating its physical characteristics and the result of NASA’s impact by the DART spacecraft in more detail. Two CubeSats onboard Hera plan to perform a ballistic landing on the secondary of the system, called Dimorphos. For these types of landings the translational state during descent is not controlled, reducing the spacecraft’s complexity but also increasing its sensitivity to deployment maneuver errors and dynamic uncertainties. This paper introduces a novel methodology to analyze the effect of these uncertainties on the dynamics of the lander and design a trajectory that is robust against them. This methodology consists of propagating the uncertain state of the lander using the nonintrusive Chebyshev interpolation (NCI) technique, which approximates the uncertain dynamics using a polynomial expansion. The results are then analyzed using the pseudo-diffusion indicator. This indicator is derived from the coefficients of the polynomial expansion, which quantifies the rate of growth of the set of possible states of the spacecraft over time. The indicator is used here to constrain the impact velocity and angle to values that allow for successful settling on the surface. This information is then used to optimize the landing trajectory by applying the NCI technique inside the transcription of the problem. The resulting trajectory increases the robustness of the trajectory compared to a conventional method, improving landing success by 20% and significantly reducing the landing footprint.
ORCID iDs
Fodde, Iosto, Feng, Jinglang ORCID: https://orcid.org/0000-0003-0376-886X, Vasile, Massimiliano ORCID: https://orcid.org/0000-0001-8302-6465 and Gil-Fernández, Jesús;-
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Item type: Article ID code: 90440 Dates: DateEventOctober 2024Published23 August 2024Published Online14 June 2024Accepted13 June 2023SubmittedSubjects: Science > Physics
Technology > Mechanical engineering and machineryDepartment: Faculty of Engineering > Mechanical and Aerospace Engineering
Faculty of EducationDepositing user: Pure Administrator Date deposited: 02 Sep 2024 12:29 Last modified: 03 Oct 2024 08:29 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/90440