Real-time robustness evaluation of regression based myoelectric control against arm position change and donning/doffing.
Real-time robustness evaluation of regression based myoelectric control against arm position change and donning/doffing.
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DOI：
10.1371/journal.pone.0186318
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发表时间：
2017
期刊：
影响因子：
3.7
通讯作者：
Müller KR
中科院分区：
文献类型：
--
作者：
Hwang HJ;Hahne JM;Müller KR
有一些实际因素，如手臂位置变化和穿/脱，这妨碍了鲁棒的肌电控制。本研究的目的是精确地描述两个代表性因素在实际控制情况下对肌电可控性的影响，从而提供有用的参考，可以潜在地用于找到更好的解决方案，为临床可靠的肌电控制。为此，14名受试者（包括1名先天性上肢缺陷患者）进行了实时目标获取任务，系统评价了手臂位置变化、穿脱以及这两种因素组合对控制性能的影响。在线性能的变化进行了检查与七个不同的性能指标，全面评估肌电可控性的各个方面。因此，臂位置变化显著影响离线预测精度，但由于实时反馈而不影响在线控制性能，从而显示离线和在线性能之间没有显著相关性。在在线控制条件下，穿/脱仍然存在问题。进一步观察到，当使用在手臂位置变化方面用多个位置数据训练的控制模型时，没有获得益处，并且由穿/脱引起的电极移位的程度与实际条件下的性能损失的程度（约Icm电极移位）没有严重关联。由于这项研究是第一个同时调查手臂位置变化和穿/脱在实际的肌电控制情况下的影响，本研究的所有结果提供了新的见解，强大的肌电控制手臂位置变化和穿/脱。
There are some practical factors, such as arm position change and donning/doffing, which prevent robust myoelectric control. The objective of this study is to precisely characterize the impacts of the two representative factors on myoelectric controllability in practical control situations, thereby providing useful references that can be potentially used to find better solutions for clinically reliable myoelectric control. To this end, a real-time target acquisition task was performed by fourteen subjects including one individual with congenital upper-limb deficiency, where the impacts of arm position change, donning/doffing and a combination of both factors on control performance was systematically evaluated. The changes in online performance were examined with seven different performance metrics to comprehensively evaluate various aspects of myoelectric controllability. As a result, arm position change significantly affects offline prediction accuracy, but not online control performance due to real-time feedback, thereby showing no significant correlation between offline and online performance. Donning/doffing was still problematic in online control conditions. It was further observed that no benefit was attained when using a control model trained with multiple position data in terms of arm position change, and the degree of electrode shift caused by donning/doffing was not severely associated with the degree of performance loss under practical conditions (around 1 cm electrode shift). Since this study is the first to concurrently investigate the impacts of arm position change and donning/doffing in practical myoelectric control situations, all findings of this study provide new insights into robust myoelectric control with respect to arm position change and donning/doffing.
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影响因子：
5.3
作者：
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