意味から実行へ：ロボットの因果的問題解決のための行動計画と強化学習の統合
From semantics to execution: Integrating action planning with reinforcement learning for robotic causal problem-solving
記号的行動計画と強化学習をスパース報酬で橋渡しし、道具使用や因果依存を含む物体操作問題を雑音下で解くニューロシンボリック手法を提案した論文。
著者: Manfred Eppe, Phuong D. H. Nguyen, Stefan Wermter
分類: cs.LG, cs.AI, cs.RO
原文アブストラクト
Reinforcement learning is an appropriate and successful method to robustly perform low-level robot control under noisy conditions. Symbolic action planning is useful to resolve causal dependencies and to break a causally complex problem down into a sequence of simpler high-level actions. A problem with the integration of both approaches is that action planning is based on discrete high-level action- and state spaces, whereas reinforcement learning is usually driven by a continuous reward function. However, recent advances in reinforcement learning, specifically, universal value function approximators and hindsight experience replay, have focused on goal-independent methods based on sparse rewards. In this article, we build on these novel methods to facilitate the integration of action planning with reinforcement learning by exploiting the reward-sparsity as a bridge between the high-level and low-level state- and control spaces. As a result, we demonstrate that the integrated neuro-symbolic method is able to solve object manipulation problems that involve tool use and non-trivial causal dependencies under noisy conditions, exploiting both data and knowledge.
