タイタン探査機の自律ミッション計画のための物理制約付き深層強化学習
A physics-constrained deep reinforcement learning method for autonomous mission planning of Titan deep space probes
タイタン探査機の自律ミッション計画のため、物理制約と行動マスクを組み込んだPCM-PPOを提案し、軌道力学や通信遮蔽を考慮した意思決定を学習させる。
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著者: Hanmin Li, Tao Wang, Shuangliang Liu, Zhe Zhang, Maodeng Li
分類: cs.AI, cs.RO
原文アブストラクト
Titan is a compelling target for future deep space exploration, while its extreme Earth-Titan distance and complex environment make continuous ground-in-the-loop planning impractical. Existing planning methods, primarily developed for Earth-observation scenarios, have limited generalizability to uncertain deep space conditions and adaptability to time-varying mission states. To address these challenges, this paper proposes a physics-constrained maskable proximal policy optimization (PCM-PPO) method for Titan autonomous mission planning. A Titan-specific discrete-time Markov decision process is established to characterize mission feasibility and resource constraints. A system dynamics and geometric model is incorporated to enhance physical representation, including central gravity, J2 perturbation, third-body attraction, and downlink occultation. To accommodate opportunity targets under a bounded action dimension, PCM-PPO organizes predefined and opportunity targets through a fixed-capacity target pool and represents the mission state with a target-wise state matrix and a global state vector. A physics-constrained action mask constructs an admissible decision domain from current mission states, guiding policy learning toward physically executable decisions and avoiding infeasible exploration. An integrated training strategy facilitates policy optimization under coupled constraints. Comparative, ablation, and uncertainty experiments validate the effectiveness of PCM-PPO. PCM-PPO provides a feasible and interpretable scheme for autonomous mission planning of Titan deep space probes.