当机器人教人类时:自动化反馈选择加速运动学习。

When a robot teaches humans: Automated feedback selection accelerates motor learning.

机构信息

Sensory-Motor Systems Lab, Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland.

BIROMED-Lab, Department of Biomedical Engineering, University of Basel, Basel, Switzerland.

出版信息

Sci Robot. 2019 Feb 20;4(27). doi: 10.1126/scirobotics.aav1560.

Abstract

A multitude of robotic systems have been developed to foster motor learning. Some of these robotic systems featured augmented visual or haptic feedback, which was automatically adjusted to the trainee's performance. However, selecting the type of feedback to achieve the training goal usually remained up to a human trainer. We automated this feedback selection within a robotic rowing simulator: Four spatial errors and one velocity error were considered, all related to trunk-arm sweep rowing set as the training goal to be learned. In an alternating sequence of assessments without augmented feedback and training sessions with augmented, concurrent feedback, the experimental group received feedback, thus addressing the main shortcoming of the previous assessment. With this approach, each participant of the experimental group received an individual sequence of 10 training sessions with feedback. The training sequences from participants in the experimental group were consecutively applied for participants in the control group. Both groups were able to reduce spatial and velocity errors due to training. The learning rate of the requested velocity profile was significantly higher for the experimental group compared with the control group. Thus, our robotic rowing simulator accelerated motor learning by automated feedback selection. This demonstration of a working, closed-loop selection of types of feedback, i.e., training conditions, could serve as the basis for other robotic trainers incorporating further human expertise and artificial intelligence.

摘要

已经开发出许多机器人系统来促进运动学习。其中一些机器人系统具有增强的视觉或触觉反馈,这些反馈会自动根据学员的表现进行调整。然而,选择反馈类型以实现培训目标通常仍取决于人类培训师。我们在机器人划船模拟器中实现了这种反馈选择的自动化:考虑了四个空间误差和一个速度误差,所有这些都与躯干-手臂划桨的设定有关,作为要学习的训练目标。在没有增强反馈的评估和增强反馈的训练课程的交替序列中,实验组收到了反馈,从而解决了之前评估的主要缺点。通过这种方法,实验组的每位参与者都接受了一个带有反馈的 10 次训练课程的个人序列。实验组参与者的训练序列连续应用于对照组的参与者。两组都能够通过训练减少空间和速度误差。实验组对请求的速度曲线的学习率明显高于对照组。因此,我们的机器人划船模拟器通过自动化反馈选择加速了运动学习。这种对反馈类型(即训练条件)的工作闭环选择的演示可以作为其他机器人培训师结合更多人类专业知识和人工智能的基础。

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