Consistent control information driven musculoskeletal model for multiday myoelectric control

Musculoskeletal model (MM)-based myoelectric interface has aroused great interest in human-machine interaction. However, the performance of electromyography (EMG)-driven MM in long-term use would be degraded owing to the inherent non-stationary characteristics of EMG signals. Here, to improve the es...

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Vydáno v:Journal of neural engineering Ročník 20; číslo 5
Hlavní autoři: Zhao, Jiamin, Yu, Yang, Sheng, Xinjun, Zhu, Xiangyang
Médium: Journal Article
Jazyk:angličtina
Vydáno: England 01.10.2023
Témata:
Algorithms
Electromyography - methods
Hand - physiology
Humans
Muscle, Skeletal - physiology
Upper Extremity
Wrist - physiology
non-negative matrix factorization algorithm
musculoskeletal model
myoelectric interface
multiday zero-retraining
ISSN:1741-2552, 1741-2552
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Shrnutí:Musculoskeletal model (MM)-based myoelectric interface has aroused great interest in human-machine interaction. However, the performance of electromyography (EMG)-driven MM in long-term use would be degraded owing to the inherent non-stationary characteristics of EMG signals. Here, to improve the estimation performance without retraining, we proposed a consistent muscle excitation extraction approach based on an improved non-negative matrix factorization (NMF) algorithm for MM when applied to simultaneous hand and wrist movement prediction. We added constraints and -norm regularization terms to the objective function of classic NMF regarding muscle weighting matrix and time-varying profiles, through which stable muscle synergies across days were identified. The resultant profiles of these synergies were then used to drive the MM. Both offline and online experiments were conducted to evaluate the performance of the proposed method in inter-day scenarios. The results demonstrated significantly better and more robust performance over several competitive methods in inter-day experiments, including machine learning methods, EMG envelope-driven MM, and classic NMF-based MM. Furthermore, the analysis of control information on different days revealed the effectiveness of the proposed method in obtaining consistent muscle excitations. The outcomes potentially provide a novel and promising pathway for the robust and zero-retraining control of myoelectric interfaces.
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ISSN:1741-2552
1741-2552
DOI:10.1088/1741-2552/acef93