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arXiv 2312.17606cs.ROcs.AIcs.LG
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四足机器人在执行器退化场景下的自适应控制策略

Adaptive Control Strategy for Quadruped Robots in Actuator Degradation Scenarios

Shanghai Jiao Tong University(上海交通大学)

Xinyuan Wu, Wentao Dong, Hang Lai, Yong Yu, Ying Wen

AI总结:

针对四足机器人执行器退化问题,提出基于强化学习的师生框架ADAPT,生成统一控制策略,仅依赖内部传感器维持运动,在Unitree A1平台上验证了其有效性和鲁棒性。

摘要:

四足机器人对极端环境具有强大的适应性,但也可能发生故障。一旦这些故障发生,机器人必须在返回任务前进行维修,从而降低了其实际可行性。在这些故障中,一个普遍关注的问题是执行器退化,其根源在于设备老化或意外操作事件等因素。传统上,解决这一问题严重依赖复杂的容错设计,这要求开发者具备深厚的领域专业知识,且缺乏泛化能力。基于学习的方法为缓解这些局限性提供了有效途径,但在实际四足机器人上有效部署此类方法仍存在研究空白。本文介绍了一种开创性的基于强化学习的师生框架,名为执行器退化自适应变换器(ADAPT),旨在填补这一研究空白。该框架产生统一的控制策略,使机器人能够仅依赖其内部传感器,在突然的关节执行器故障下维持运动并执行任务。在Unitree A1平台上的实证评估验证了ADAPT在实际四足机器人上的可部署性和有效性,并证实了我们方法的鲁棒性和实用性。

英文摘要:

Quadruped robots have strong adaptability to extreme environments but may also experience faults. Once these faults occur, robots must be repaired before returning to the task, reducing their practical feasibility. One prevalent concern among these faults is actuator degradation, stemming from factors like device aging or unexpected operational events. Traditionally, addressing this problem has relied heavily on intricate fault-tolerant design, which demands deep domain expertise from developers and lacks generalizability. Learning-based approaches offer effective ways to mitigate these limitations, but a research gap exists in effectively deploying such methods on real-world quadruped robots. This paper introduces a pioneering teacher-student framework rooted in reinforcement learning, named Actuator Degradation Adaptation Transformer (ADAPT), aimed at addressing this research gap. This framework produces a unified control strategy, enabling the robot to sustain its locomotion and perform tasks despite sudden joint actuator faults, relying exclusively on its internal sensors. Empirical evaluations on the Unitree A1 platform validate the deployability and effectiveness of Adapt on real-world quadruped robots, and affirm the robustness and practicality of our approach.

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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