用物理属性分支提升科学探索的智能决策效率
POMDPs for Autonomous Science Exploration

- 以推断的物理属性替代原始数据,降低规划复杂度
- 在50维观测下奖励提升18.6%,计算时间减少32.9%
- 适合需要高精度科学决策的自主探测任务
自主探索任务需在传感器不确定性与计算约束下做出决策,但将科学表征融入部分可观测马尔可夫决策过程(POMDP)因高维观测空间一直难以实现。信息论规划器通过假设确定性观测来克服这一难题,却牺牲了POMDP提供的严谨不确定性量化能力。本文提出科学假说地图POMDP(SHM-POMDP),通过在推断的物理属性上分支,使基于信念空间的科学驱动规划更可操作。该方法利用学习的观测模型保留完整传感器信息,同时让规划器在不确定性下联合推理导航与科学属性。在扩展的RockSample领域(50维观测),SHM-POMDP相比连续观测基线实现18.6%更高的奖励和32.9%更低的每步计算时间。在使用Cuprite高光谱数据的真实地质探索中,相较最优信息论基线,其信息增益提升2.5倍,并仅用均匀先验即达到80%的虚拟最优性能。结果表明,将分层概率模型融入信念空间规划,可实现高效且严谨的自主科学探索,优于传统POMDP方法与科学感知的信息论方法。
原文摘要 · Abstract (English)
Autonomous exploration missions require decision-making under sensor uncertainty and computational constraints, yet integrating scientific representations into POMDP planning has remained intractable due to high-dimensional observation spaces. Information-theoretic planners overcome this by assuming deterministic observations, sacrificing the principled uncertainty quantification that POMDPs provide. We introduce the Science Hypothesis Map POMDP (SHM-POMDP), which makes science-driven belief-space planning more tractable by branching on inferred physical properties rather than raw sensor data. This preserves full sensor information through learned observation models while enabling the planner to reason jointly about navigation and scientific properties under uncertainty. On an extended RockSample domain with 50-dimensional observations, SHM-POMDP achieves 18.6\% higher rewards and 32.9\% reduced computation time per step than continuous-observation baselines. On realistic geologic exploration using Cuprite hyperspectral data, SHM-POMDP achieves 2.5$\times$ higher information gain than the best information-theoretic baseline by maintaining beliefs and replanning adaptively---reaching 80\% of oracle performance using only uniform priors. These results demonstrate that integrating hierarchical probabilistic models into belief-space planning enables tractable, principled autonomous science that outperforms both traditional POMDP methods and science-aware information-theoretic approaches.
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