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Astrodynamics

Article Title

Target sequence optimization for multiple debris rendezvous using low thrust based on characteristics of SSO

Keywords

multiple debris rendezvous, sun-synchronous orbits (SSO), low thrust, optimal control

Abstract

A method is proposed to select the target sequence for a J2-perturbed multiple debrisrendezvous mission aimed at removing dozens of debris from several thousand debriscandidates running on sun-synchronous orbits (SSO). The solving methodology proceeds intwo steps: Firstly, the variance of the right ascension of ascending node (RAAN) of the debrisgroup is used for narrowing down the potential debris candidate; secondly, the debris of thecandidate group that has closest RAAN to the current debris is chosen as the next debris.The low thrust near-minimum-fuel trajectories of each rendezvous leg are obtained by theindirect optimization method. The proposed approach is demonstrated for the problemof the 8th China Trajectory Optimization Competition (CTOC). The radar cross section(RCS) of the debris is also considered in the first step since the primary performance indexof the competition is to maximize the total RCS of the debris visited. The results showthat the proposed approach achieves better performance within a competition period. Ofthe many rendezvous sequences found, the best one submitted for the competition obtaineda total RCS of 184 by accomplishing rendezvous with 70 debris within a transfer durationof one year.

Publisher

Tsinghua University Press

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