发表机构
Stanford University（斯坦福大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出 ART-TWIN，一种基于 Transformer 的双向热启动轨迹生成方法，用于环月空间交会任务，通过双弧拼接加速非凸最优控制求解，显著提升收敛速度与可行性。
AI 中文摘要
自主航天器制导与控制需要快速求解非凸轨迹优化问题，而通过向优化协议提供接近最优的初始猜测（即热启动）可以加速该过程。在环月空间中，特别是在近月点，底层动力学与地球轨道相比变得严重非线性和混沌，因此稳健的热启动方法对于交会、近距离操作和对接（RPOD）尤为有用。本文首次将基于 Transformer 的热启动轨迹生成方法——自主交会 Transformer（ART）——扩展到环月 RPOD 场景。为了准确可靠地求解这些场景带来的非凸最优控制问题（OCP），本文引入了一种新的增强版 ART，即 ART-TWIN（双向推理）。受其他轨迹设计应用中使用的正反向打靶法启发，ART-TWIN 自回归地生成两条弧线，一条从初始状态出发，另一条从期望终端状态出发，并在时间序列的中点处拼接。在从近月点初始化的一组模拟交会场景上进行评估时，与凸松弛和原始 ART 相比，ART-TWIN 作为序列凸规划（SCP）的热启动，被证明能显著加速收敛并提高可行性保证。这些结果说明了 ART-TWIN 双弧生成机制的必要性，它使得在环月动力学区域最具挑战性的区域中，使用基于 Transformer 的热启动方法成为可能并获得收益。
英文摘要
Autonomous spacecraft guidance and control requires a fast solution to non-convex trajectory optimization, which can be accelerated by providing a near-optimal initial guess to an optimization protocol, i.e., warm-starting. A robust warm starting method is especially useful for rendezvous, proximity operations, and docking (RPOD) in cislunar space, where the underlying dynamics become severely nonlinear and chaotic compared to those in Earth orbit, especially at perilune. This paper extends the Autonomous Rendezvous Transformer (ART), a transformer-based warm-start trajectory generation method, to cislunar RPOD scenarios for the first time. To accurately and reliably solve the nonconvex optimal control problems (OCPs) posed by these scenarios, a new and enhanced version of ART, ART-TWIN (Two-Way INference), is introduced. Inspired by forward-backward shooting methods used in other trajectory design applications, ART-TWIN autoregressively generates two arcs, one from the initial state and one from the desired terminal state, that are patched together at the midpoint of the timeseries. When evaluated on a set of simulated rendezvous scenarios that are initialized at perilune, ART-TWIN is demonstrated to substantially accelerate convergence and increase feasibility guarantees when used as a warm-start to sequential convex programming (SCP), compared to convex relaxations and the original ART. These results illustrate the necessity of ART-TWIN's dual-arc generation to enable the viability of and gain benefits from using transformer-based warm-start methods in the most challenging areas of the cislunar dynamical regime.
Comments2026 AAS/AIAA Astrodynamics Specialist Conference
