Self-Driving Telescopes: Autonomous Scheduling of Astronomical Observation Campaigns with Offline Reinforcement Learning
作者: Franco Terranova, M. Voetberg, Brian Nord, Amanda Pagul
分类: astro-ph.IM, astro-ph.CO, cs.AI, cs.LG
发布日期: 2023-11-29
备注: Accepted in Machine Learning and the Physical Sciences Workshop at NeurIPS 2023; 6 pages, 5 figures
💡 一句话要点
提出自驾望远镜以解决天文观测调度优化问题
🎯 匹配领域: 支柱二:RL算法与架构 (RL & Architecture)
关键词: 自驾望远镜 强化学习 深度Q网络 天文观测 多目标优化 开源框架 数据质量
📋 核心要点
- 现有的天文观测调度方法面临多目标优化的挑战,观测需求之间存在强烈竞争,尚未找到有效解决方案。
- 本文提出利用强化学习,特别是深度Q网络(DQN),来训练自驾望远镜,以优化天文观测的调度策略。
- 实验结果表明,经过多种DQN实现的比较,模型在测试集上达到了87%±6%的平均奖励,显示出显著的性能提升。
📝 摘要(中文)
现代天文实验旨在实现多种科学目标,这些目标需要不同类别的夜空对象数据,而这些观测需求之间通常存在竞争关系。本文探讨了利用强化学习(RL)训练自驾望远镜以优化天文观测调度的可能性。通过模拟数据训练深度Q网络(DQN),实现了对Stone Edge Observatory观测调度的优化,最终在测试集中达到了87%±6%的平均奖励。这是首次针对特定天文挑战比较离线RL算法,并提供了开源框架以进行评估。
🔬 方法详解
问题定义:本文旨在解决天文观测调度中的多目标优化问题,现有方法未能有效平衡不同观测需求之间的竞争关系。
核心思路:通过强化学习,特别是深度Q网络(DQN),训练自驾望远镜以优化观测调度,最大化累积奖励,从而提高数据质量。
技术框架:整体架构包括数据模拟、DQN模型训练和调度优化三个主要模块。首先生成模拟数据,然后使用DQN进行训练,最后优化观测调度策略。
关键创新:首次比较了离线强化学习算法在特定天文挑战中的应用,并提供了开源框架,推动了该领域的研究进展。
关键设计:在DQN的实现中,结合了多种改进措施和数据集调整,确保模型在测试集上达到87%±6%的平均奖励,优化了参数设置和网络结构。
🖼️ 关键图片
📊 实验亮点
实验结果显示,经过多种DQN实现的比较,模型在测试集上达到了87%±6%的平均奖励,相较于基线方法有显著提升。这一成果为天文观测调度提供了新的解决方案。
🎯 应用场景
该研究的潜在应用领域包括天文观测调度、自动化科学实验和智能机器人等。通过优化观测策略,可以提高数据采集效率,推动天文学研究的进展,未来可能影响其他科学领域的自动化调度问题。
📄 摘要(原文)
Modern astronomical experiments are designed to achieve multiple scientific goals, from studies of galaxy evolution to cosmic acceleration. These goals require data of many different classes of night-sky objects, each of which has a particular set of observational needs. These observational needs are typically in strong competition with one another. This poses a challenging multi-objective optimization problem that remains unsolved. The effectiveness of Reinforcement Learning (RL) as a valuable paradigm for training autonomous systems has been well-demonstrated, and it may provide the basis for self-driving telescopes capable of optimizing the scheduling for astronomy campaigns. Simulated datasets containing examples of interactions between a telescope and a discrete set of sky locations on the celestial sphere can be used to train an RL model to sequentially gather data from these several locations to maximize a cumulative reward as a measure of the quality of the data gathered. We use simulated data to test and compare multiple implementations of a Deep Q-Network (DQN) for the task of optimizing the schedule of observations from the Stone Edge Observatory (SEO). We combine multiple improvements on the DQN and adjustments to the dataset, showing that DQNs can achieve an average reward of 87%+-6% of the maximum achievable reward in each state on the test set. This is the first comparison of offline RL algorithms for a particular astronomical challenge and the first open-source framework for performing such a comparison and assessment task.