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S&M3551 Research Paper of Special Issue https://doi.org/10.18494/SAM4681 Published: February 29, 2024 Human Hand Gesture Classification Based on Surface Electromyography Signals by Using a Vector–Kernel Convolutional Takagi–Sugeno–Kang Neuro-fuzzy Classifier [PDF] Cheng-Jian Lin, Chun-Jung Lin, and Xin-Wei Lin (Received June 8, 2023; Accepted January 12, 2024) Keywords: fast Fourier transform (FFT), hand gesture classification, neuro-fuzzy network, surface electromyography (sEMG), vector–kernel convolution
Muscle–computer interfaces are devices that can identify the meaning of human bioelectrical signals, such as surface electromyography (sEMG) signals. sEMG signals can be obtained from arm-worn sensors and can be used to classify human gestures. In this paper, we propose a vector–kernel convolutional Takagi–Sugeno–Kang (TSK)-type neuro-fuzzy classifier (VK-CTNFC) to recognize human gestures represented by sEMG signals. First, vector–kernel convolution is used to extract the features of sEMG signals; this modification reduces the model parameters by half and increases the classification accuracy compared with those achieved with a conventional convolutional kernel. Second, the global average pooling method is used instead of the flattening method to improve feature fusion performance. Finally, a TSK-type neuro-fuzzy network is used for gesture classification. The publicly available dataset Ninapro DB1 was used in experiments for verifying the performance of the proposed VK-CTNFC. Data preprocessing was performed by wavelet denoising to smooth the sEMG waveform, and fast Fourier transform was used to convert time-domain sEMG signals into frequency-domain signals. Finally, the processed sEMG signals were input into the VK-CTNFC for training. The experimental results indicate that the proposed VK-CTNFC has an average accuracy of 87.18% and outperforms other reported methods.
Corresponding author: Cheng-Jian LinThis work is licensed under a Creative Commons Attribution 4.0 International License. Cite this article Cheng-Jian Lin, Chun-Jung Lin, and Xin-Wei Lin, Human Hand Gesture Classification Based on Surface Electromyography Signals by Using a Vector–Kernel Convolutional Takagi–Sugeno–Kang Neuro-fuzzy Classifier, Sens. Mater., Vol. 36, No. 2, 2024, p. 623-637. |