A Novel Event-Driven Spiking Convolutional Neural Network for Electromyography Pattern Recognition

• Published in: IEEE transactions on biomedical engineering 2023-09, Vol.PP (9), p.1-14
• Main Authors: Xu, Mengjuan, Chen, Xiang, Sun, Antong, Zhang, Xu, Chen, Xun
• Format: Article
• Language: English
• Subjects: Artificial neural networks; Control systems; Convolutional neural networks; Discriminant analysis; Electrodes; Electromyography; EMG pattern recognition; event-driven dif-ferential coding; Firing pattern; LIF; Long short-term memory; Multilayer perceptrons; Myoelectric control; Myoelectricity; Neural networks; Pattern recognition; Power consumption; Power demand; Power management; Prostheses; Robustness; SNN; Spiking; STBP; Task analysis; Training; User training
• ISSN: 0018-9294; 1558-2531
• DOI: 10.1109/TBME.2023.3258606

Electromyography (EMG) pattern recognition is an important technology for prosthesis control and human-computer interaction etc. However, the practical ap-plication of EMG pattern recognition is hampered by poor accuracy and robustness due to electrode shift caused by repeated wearing of the signal acquisition device. More-over, the user's acceptability is low due to the heavy training burden, which is caused by the need for a large amount of training data by traditional deep learning meth-ods. In order to explore the advantage of spiking neural network (SNN) in solving the poor robustness and heavy training burden problems in EMG pattern recognition, a spiking convolutional neural network (SCNN) composed of cyclic convolutional neural network (CNN) and fully con-nected modules is proposed and implemented in this study. High density surface electromyography (HD-sEMG) signals collected from 6 gestures of 10 subjects at 6 electrode positions are taken as the research object. Compared to CNN with the same structure, CNN-Long Short Term Mem-ory (CNN-LSTM), linear kernel linear discriminant analysis classifier (LDA) and spiking multilayer perceptron (Spiking MLP), the accuracy of SCNN is 50.69%, 33.92%, 32.94% and 9.41% higher in the small sample training experiment, 6.50%, 4.23%, 28.73%, and 2.57% higher in the electrode shifts experiment respectively. In addition, the power con-sumption of SCNN is about 1/93 of CNN. The advantages of the proposed framework in alleviating user training bur-den, mitigating the adverse effect of electrode shifts and reducing power consumption make it very meaningful for promoting the development of user-friendly real-time myo-electric control system.