arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2103.13834cs.ROcs.AI
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规划式自我模仿学习

Self-Imitation Learning by Planning

University of Groningen(格罗宁根大学)

Sha Luo, Hamidreza Kasaei, Lambert Schomaker

摘要:

模仿学习(Imitation learning,IL)通过传递专家知识使机器人快速获得技能,广泛用于强化学习(reinforcement learning,RL)初始化探索。然而,在长时间运动规划任务中,部署IL和RL方法的挑战性问题是如何生成和收集大量的、广泛分布的数据,使得这些方法可以有效地推广。在这项工作中,我们解决了这个问题,使用我们提出的方法称为{自我模仿学习规划(SILP)},其中演示数据自动收集规划的访问状态从当前的政策。SILP的灵感来自于观察到在早期强化学习阶段成功访问的状态是基于图搜索的运动规划器中的无冲突节点,因此我们可以规划和重新标记机器人自己的试验作为策略学习的示范。由于这些自我生成的演示,我们减轻了人类操作员的费力的数据准备过程中所需的IL和RL方法在解决复杂的运动规划任务。评估结果表明,我们的SILP方法实现了更高的成功率和提高样本效率相比,选定的基线,在模拟学习的政策表现良好,在现实世界的布局任务与不断变化的目标和障碍。

英文摘要:

Imitation learning (IL) enables robots to acquire skills quickly by transferring expert knowledge, which is widely adopted in reinforcement learning (RL) to initialize exploration. However, in long-horizon motion planning tasks, a challenging problem in deploying IL and RL methods is how to generate and collect massive, broadly distributed data such that these methods can generalize effectively. In this work, we solve this problem using our proposed approach called {self-imitation learning by planning (SILP)}, where demonstration data are collected automatically by planning on the visited states from the current policy. SILP is inspired by the observation that successfully visited states in the early reinforcement learning stage are collision-free nodes in the graph-search based motion planner, so we can plan and relabel robot's own trials as demonstrations for policy learning. Due to these self-generated demonstrations, we relieve the human operator from the laborious data preparation process required by IL and RL methods in solving complex motion planning tasks. The evaluation results show that our SILP method achieves higher success rates and enhances sample efficiency compared to selected baselines, and the policy learned in simulation performs well in a real-world placement task with changing goals and obstacles.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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