ロボット強化学習のための滑らかな探索手法
Smooth Exploration for Robotic Reinforcement Learning
深層強化学習の探索ノイズを状態依存型に改良し、実機ロボットでも滑らかな動作で学習できるgSDEを提案・検証した論文。
著者: Antonin Raffin, Jens Kober, Freek Stulp
分類: cs.LG, cs.RO, stat.ML
原文アブストラクト
Reinforcement learning (RL) enables robots to learn skills from interactions with the real world. In practice, the unstructured step-based exploration used in Deep RL -- often very successful in simulation -- leads to jerky motion patterns on real robots. Consequences of the resulting shaky behavior are poor exploration, or even damage to the robot. We address these issues by adapting state-dependent exploration (SDE) to current Deep RL algorithms. To enable this adaptation, we propose two extensions to the original SDE, using more general features and re-sampling the noise periodically, which leads to a new exploration method generalized state-dependent exploration (gSDE). We evaluate gSDE both in simulation, on PyBullet continuous control tasks, and directly on three different real robots: a tendon-driven elastic robot, a quadruped and an RC car. The noise sampling interval of gSDE permits to have a compromise between performance and smoothness, which allows training directly on the real robots without loss of performance. The code is available at https://github.com/DLR-RM/stable-baselines3.
