Wearable Biofeedback System to Induce Desired Walking Speed in Overground Gait Training
Wearable Biofeedback System to Induce Desired Walking Speed in Overground Gait Training
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DOI：
10.3390/s20144002
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发表时间：
2020-07-01
期刊：
影响因子：
3.9
通讯作者：
Zanotto, Damiano
中科院分区：
文献类型：
--
作者：
Zhang, Huanghe;Yin, Yefei;Zanotto, Damiano
生物反馈系统已广泛用于步行锻炼以改善步态。过去的研究集中在调节穿戴者的节奏、步态变化性或对称性，但是先前的工作都没有解决在穿戴者中诱导期望的行走速度的问题。在本文中，我们提出了一种新的，最小的侵扰可穿戴生物反馈系统（WBS），使用闭环振动触觉控制，以引起所需的变化，在穿戴者的步行速度，根据预测的用户响应预期和延迟的反馈。所提出的控制的性能进行了比较，传统的开环有节奏的振动触觉刺激与N = 10个健康的人被要求完成一组行走任务沿着一个椭圆形path.The闭环振动触觉控制始终表现出更好的性能比开环控制在诱导所需的变化，穿着者的步行速度，无论是与恒定的和随时间变化的目标步行速度。无论是开环还是闭环刺激影响自然步态显着，当目标步行速度被设置为个人的首选步行速度。鉴于步行速度作为健康和身体表现的综合指标的重要性，闭环振动触觉控制可以为步态康复的新技术增强协议铺平道路。
Biofeedback systems have been extensively used in walking exercises for gait improvement. Past research has focused on modulating the wearer's cadence, gait variability, or symmetry, but none of the previous works has addressed the problem of inducing a desired walking speed in the wearer. In this paper, we present a new, minimally obtrusive wearable biofeedback system (WBS) that uses closed-loop vibrotactile control to elicit desired changes in the wearer's walking speed, based on the predicted user response to anticipatory and delayed feedback. The performance of the proposed control was compared to conventional open-loop rhythmic vibrotactile stimulation with N = 10 healthy individuals who were asked to complete a set of walking tasks along an oval path. The closed-loop vibrotactile control consistently demonstrated better performance than the open-loop control in inducing desired changes in the wearer's walking speed, both with constant and with time-varying target walking speeds. Neither open-loop nor closed-loop stimuli affected natural gait significantly, when the target walking speed was set to the individual's preferred walking speed. Given the importance of walking speed as a summary indicator of health and physical performance, the closed-loop vibrotactile control can pave the way for new technology-enhanced protocols for gait rehabilitation.