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1 Journal of Theoretical and Applied Mechanics

1 2024

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High accuracy recognition of muscle fatigue based on sEMG multifractal and LSTM

Zhang Xia, Gu Zhongli

Journal of Theoretical and Applied Mechanics

2024

Vol. 62 nr 1

117--128

A muscle fatigue identification method that integrates the multifractal of sEMG with LSTM is proposed. The MFDMA method was introduced to analyze and extract non-linear prop- erties of sEMG. The significance of differences between the fatigue and non-fatigue states in terms of spectral width, Hurst index variation difference, and peak singularity index was determined using the t-test. A LSTM networks under the combined feature set comprising multiple fractals was built, and its recognition accuracy was 98.91%. The LSTM network model was found to be more accurate than other classification methods in identifying muscle fatigue under the same feature set.