Recurrent Neural Network Enabled Continuous Motion Estimation of Lower Limb Joints from Incomplete sEMG Signals

Gang Wang1; Long Jin2; Jiliang Zhang3; Xiaoqin Duan4; Jiang Yi4; Mingming Zhang5; Zhongbo Sun6

2024

10.1109/TNSRE.2024.3459924

IEEE Transactions on Neural Systems and Rehabilitation Engineering   影响因子和分区

1558-0210

Decoding continuous human motion from surface electromyography (sEMG) in advance is crucial for improving the intelligence of exoskeleton robots. However, incomplete sEMG signals are prevalent on account of unstable data transmission, sensor malfunction, and electrode sheet detachment. These non-ideal factors severely compromise the accuracy of continuous motion recognition and the reliability of clinical applications. To tackle this challenge, this paper develops a multi-task parallel learning framework for continuous motion estimation with incomplete sEMG signals. Concretely, a residual network is incorporated into a recurrent neural network to integrate the information flow of hidden states and reconstruct random and consecutive missing sEMG signals. The attention mechanism is applied for redistributing the distribution of weights. A jointly optimized loss function is devised to enable training the model for simultaneously dealing with signal anomalies/absences and multi-joint continuous motion estimation. The proposed model is implemented for estimating hip, knee, and ankle joint angles of physically competent individuals and patients during diverse exercises. Experimental results indicate that the estimation root-mean-square errors with 60% missing sEMG signals steadily converges to below 5 degrees. Even with multi-channel electrode sheet shedding, our model still demonstrates cutting-edge estimation performance, errors only marginally increase 1 degree.

其他

1.Department of Mechatronic Engineering, Changchun University of Technology, Changchun, China
2.School of Information Science and Engineering, Lanzhou University, Lanzhou, China
3.College of Information Science and Engineering, Northeastern University, Shenyang, China
4.Department of Rehabilitation Medicine of the Second Hospital of JiLin University, Changchun, China
5.Department of Biomedical Engineering, Shenzhen Key Laboratory of Smart Healthcare Engineering and the Guangdong Provincial Key Laboratory of Advanced Biomaterials, Southern University of Science and Technology, Nanshan, Shenzhen, China
6.Department of Control Engineering, Changchun University of Technology, Changchun, China

Gang Wang,Long Jin,Jiliang Zhang,et al. Recurrent Neural Network Enabled Continuous Motion Estimation of Lower Limb Joints from Incomplete sEMG Signals[J]. IEEE Transactions on Neural Systems and Rehabilitation Engineering,2024,PP(99).

Gang Wang.,Long Jin.,Jiliang Zhang.,Xiaoqin Duan.,Jiang Yi.,...&Zhongbo Sun.(2024).Recurrent Neural Network Enabled Continuous Motion Estimation of Lower Limb Joints from Incomplete sEMG Signals.IEEE Transactions on Neural Systems and Rehabilitation Engineering,PP(99).

Gang Wang,et al."Recurrent Neural Network Enabled Continuous Motion Estimation of Lower Limb Joints from Incomplete sEMG Signals".IEEE Transactions on Neural Systems and Rehabilitation Engineering PP.99(2024).