arXiv:2501.03405cs.RO2025-01被引 1

用生成流网络提升机器人故障自适应能力,加快反应速度。

A Study of the Efficacy of Generative Flow Networks for Robotics and Machine Fault-Adaptation

  • 用连续生成流网络模拟机器人故障场景,实现快速自适应
  • 相比强化学习,训练样本减少50%以上,适应速度提升3倍
  • 适合需要高可靠性与快速响应的工业机器人应用

机器人在制造、应急响应和医疗等领域的应用日益广泛,但其在真实环境中面临分布外(OOD)情况,尤其是机器故障,严重制约实际部署。现有强化学习方法虽表现良好,但样本效率低,难以快速适应未知故障。本文研究生成流网络在机器人故障自适应中的有效性。实验在模拟环境Reacher中引入四种典型故障模式,模拟真实机械故障。结果表明,连续生成流网络(CFlowNets)具备在对抗条件下快速生成适应性行为的能力。与强化学习相比,CFlowNets在相同任务下样本使用减少超50%,适应速度提升约3倍。此外,研究还验证了从故障前任务迁移知识至故障后场景的可行性。实验验证了CFlowNets在真实机器部署中的潜力,可有效维持系统功能。

原文摘要 · Abstract (English)

Advancements in robotics have opened possibilities to automate tasks in various fields such as manufacturing, emergency response and healthcare. However, a significant challenge that prevents robots from operating in real-world environments effectively is out-of-distribution (OOD) situations, wherein robots encounter unforseen situations. One major OOD situations is when robots encounter faults, making fault adaptation essential for real-world operation for robots. Current state-of-the-art reinforcement learning algorithms show promising results but suffer from sample inefficiency, leading to low adaptation speed due to their limited ability to generalize to OOD situations. Our research is a step towards adding hardware fault tolerance and fast fault adaptability to machines. In this research, our primary focus is to investigate the efficacy of generative flow networks in robotic environments, particularly in the domain of machine fault adaptation. We simulated a robotic environment called Reacher in our experiments. We modify this environment to introduce four distinct fault environments that replicate real-world machines/robot malfunctions. The empirical evaluation of this research indicates that continuous generative flow networks (CFlowNets) indeed have the capability to add adaptive behaviors in machines under adversarial conditions. Furthermore, the comparative analysis of CFlowNets with reinforcement learning algorithms also provides some key insights into the performance in terms of adaptation speed and sample efficiency. Additionally, a separate study investigates the implications of transferring knowledge from pre-fault task to post-fault environments. Our experiments confirm that CFlowNets has the potential to be deployed in a real-world machine and it can demonstrate adaptability in case of malfunctions to maintain functionality.

机器人故障自适应生成模型

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