用于手腕旋转和手部孔径振动本体感觉反馈的紧凑型解决方案。

IF 5.2 2区 医学 Q1 ENGINEERING, BIOMEDICAL
Andrea Marinelli, Nicolò Boccardo, Michele Canepa, Dario Di Domenico, Emanuele Gruppioni, Matteo Laffranchi, Lorenzo De Michieli, Michela Chiappalone, Marianna Semprini, Strahinja Dosen
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引用次数: 0

摘要

背景:通过提供人工感觉反馈来闭合用户与假肢之间的控制环,是完全恢复失去的感觉运动功能的基本步骤:我们提出了一种新方法,利用由 8 个振动电机组成的单一阵列(紧凑型解决方案)提供两个自由度的人工本体感觉反馈。在一项在线闭环控制任务中,新方法所提供的性能与传统方法所提供的性能进行了比较。在传统方法中,同样的信息分别通过两个由 8 个和 4 个振动电机组成的阵列(每个自由度一个阵列)来传递。新方法采用高斯插值法来调节单个振动电机阵列(紧凑反馈)的强度曲线,通过调整高斯的平均值和标准偏差来分别传递手腕旋转和手部开度的信息。十名健全参与者和四名经桡骨截肢者利用模式识别与紧凑型和传统型振动反馈来控制汉内斯假手(测试条件),进行了目标实现控制测试。第二组由 10 名健全参与者组成,他们在控制条件下进行了同样的实验,包括视觉和听觉反馈以及无反馈:结果:传统方法和紧凑方法的定位精度、时间和路径效率以及总试验时间相似。与对照条件的比较显示,振动反馈直观而有用,但也凸显了偶然反馈源的力量。值得注意的是,截肢者的表现与健全者相似:因此,这项研究表明,新颖的反馈策略可以传递有关假肢运动的有用信息,同时减少电机数量,而不会影响性能。这是将这种界面完全集成到临床使用的假肢插座中的重要一步。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A compact solution for vibrotactile proprioceptive feedback of wrist rotation and hand aperture.

Background: Closing the control loop between users and their prostheses by providing artificial sensory feedback is a fundamental step toward the full restoration of lost sensory-motor functions.

Methods: We propose a novel approach to provide artificial proprioceptive feedback about two degrees of freedom using a single array of 8 vibration motors (compact solution). The performance afforded by the novel method during an online closed-loop control task was compared to that achieved using the conventional approach, in which the same information was conveyed using two arrays of 8 and 4 vibromotors (one array per degree of freedom), respectively. The new method employed Gaussian interpolation to modulate the intensity profile across a single array of vibration motors (compact feedback) to convey wrist rotation and hand aperture by adjusting the mean and standard deviation of the Gaussian, respectively. Ten able-bodied participants and four transradial amputees performed a target achievement control test by utilizing pattern recognition with compact and conventional vibrotactile feedback to control the Hannes prosthetic hand (test conditions). A second group of ten able-bodied participants performed the same experiment in control conditions with visual and auditory feedback as well as no-feedback.

Results: Conventional and compact approaches resulted in similar positioning accuracy, time and path efficiency, and total trial time. The comparison with control condition revealed that vibrational feedback was intuitive and useful, but also underlined the power of incidental feedback sources. Notably, amputee participants achieved similar performance to that of able-bodied participants.

Conclusions: The study therefore shows that the novel feedback strategy conveys useful information about prosthesis movements while reducing the number of motors without compromising performance. This is an important step toward the full integration of such an interface into a prosthesis socket for clinical use.

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来源期刊
Journal of NeuroEngineering and Rehabilitation
Journal of NeuroEngineering and Rehabilitation 工程技术-工程:生物医学
CiteScore
9.60
自引率
3.90%
发文量
122
审稿时长
24 months
期刊介绍: Journal of NeuroEngineering and Rehabilitation considers manuscripts on all aspects of research that result from cross-fertilization of the fields of neuroscience, biomedical engineering, and physical medicine & rehabilitation.
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