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Low-thrust Trajectory Design using Closed-loop Feedback-driven Control Laws and State-dependent Parameters

Holt, Harry, Armellin, Roberto, Scorsoglio, Andrea and Furfaro, Roberto (2020) Low-thrust Trajectory Design using Closed-loop Feedback-driven Control Laws and State-dependent Parameters In: AIAAA Scitech 2020 Forum, 6-10 January 2020, Orlando, FL.

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Abstract

Low-thrust many-revolution trajectory design and orbit transfers are becoming increasingly important with the development of high specific impulse, low-thrust engines. Closed-loop feedback-driven (CLFD) control laws can be used to solve these trajectory design problems with minimal computational cost and offer potential for autonomous guidance. However, they have user-defined parameters which limit their optimality. In this work, an actor-critic reinforcement learning framework is proposed to make the parameters of the Lyapunov-based Q-law state-dependent, ensuring the controller can adapt as the dynamics evolve during a transfer. The proposed framework should be independent of the particular CLFD control law and provides improved solutions for mission analysis. There is also potential for future on-board autonomous use, as trajectories are closed-form and can be generated without an initial guess. The current results focus on GTO-GEO transfers in Keplerian dynamics and later with eclipse and J2 effects. Both time-optimal and mass-optimal transfers are presented, and the stability to uncertainties in orbit determination are discussed. The task of handling orbit perturbations is left to future work.

Item Type: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
NameEmailORCID
Holt, Harryh.holt@surrey.ac.uk
Armellin, Robertor.armellin@surrey.ac.uk
Scorsoglio, Andrea
Furfaro, Roberto
Date : 5 January 2020
OA Location : https://arc.aiaa.org/doi/abs/10.2514/6.2020-1694
Depositing User : James Marshall
Date Deposited : 31 Jan 2020 16:24
Last Modified : 31 Jan 2020 16:24
URI: http://epubs.surrey.ac.uk/id/eprint/853539

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