Locomotion Prediction for Lower Limb Prostheses in Complex Environments via sEMG and Inertial Sensors
Previous studies have shown that the motion intention recognition for lower limb prosthesis mainly focused on the identification of performed gait. However, the bionic prosthesis needs to know the next movement at the beginning of a new gait, especially in complex operation environments. In this pap...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Complexity |
| Online Access: | http://dx.doi.org/10.1155/2020/8810663 |
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| author | Fang Peng Cheng Zhang Bugong Xu Jiehao Li Zhen Wang Hang Su |
| author_facet | Fang Peng Cheng Zhang Bugong Xu Jiehao Li Zhen Wang Hang Su |
| author_sort | Fang Peng |
| collection | DOAJ |
| description | Previous studies have shown that the motion intention recognition for lower limb prosthesis mainly focused on the identification of performed gait. However, the bionic prosthesis needs to know the next movement at the beginning of a new gait, especially in complex operation environments. In this paper, an upcoming locomotion prediction scheme via multilevel classifier fusion was proposed for the complex operation. At first, two motion states, including steady state and transient state, were defined. Steady-state recognition was backtracking of a completed gait, which would be used as prior knowledge of motion prediction. In steady-state recognition, surface electromyographic (sEMG) and inertial sensors were fused to improve recognition accuracy; five typical locomotion modes were recognized by random forest classifier with over 97.8% accuracy. The transient state was defined as an observation period at the initial stage of upcoming movement, in which only the sEMG signal was recorded due to the limitation of sliding window length. LightGBM classifier was validated to outperform other methods in the accuracy and prediction time of transient-state recognition. Finally, a simplified HMM model based on prior knowledge and observation result was constructed to predict upcoming locomotion. The results indicated that the locomotion prediction was over 91% accuracy. The proposed scheme implements the locomotion prediction at the initial stage of each gait and provides critical information for the gait control of lower limb prosthesis. |
| format | Article |
| id | doaj-art-f563bfcd38d341cf9c8b2a4759da4787 |
| institution | Kabale University |
| issn | 1076-2787 1099-0526 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Complexity |
| spelling | doaj-art-f563bfcd38d341cf9c8b2a4759da47872025-08-20T03:25:27ZengWileyComplexity1076-27871099-05262020-01-01202010.1155/2020/88106638810663Locomotion Prediction for Lower Limb Prostheses in Complex Environments via sEMG and Inertial SensorsFang Peng0Cheng Zhang1Bugong Xu2Jiehao Li3Zhen Wang4Hang Su5University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, ChinaDepartment of Computer Science and Communications Engineering, Waseda University, Tokyo, JapanSchool of Automation Science and Engineering, South China University of Technology, Guangzhou 510641, ChinaDepartment of Electronics, Information and Bioengineering, Politecnico di Milano, Milano 20133, ItalyDepartment of Electronics, Information and Bioengineering, Politecnico di Milano, Milano 20133, ItalyDepartment of Electronics, Information and Bioengineering, Politecnico di Milano, Milano 20133, ItalyPrevious studies have shown that the motion intention recognition for lower limb prosthesis mainly focused on the identification of performed gait. However, the bionic prosthesis needs to know the next movement at the beginning of a new gait, especially in complex operation environments. In this paper, an upcoming locomotion prediction scheme via multilevel classifier fusion was proposed for the complex operation. At first, two motion states, including steady state and transient state, were defined. Steady-state recognition was backtracking of a completed gait, which would be used as prior knowledge of motion prediction. In steady-state recognition, surface electromyographic (sEMG) and inertial sensors were fused to improve recognition accuracy; five typical locomotion modes were recognized by random forest classifier with over 97.8% accuracy. The transient state was defined as an observation period at the initial stage of upcoming movement, in which only the sEMG signal was recorded due to the limitation of sliding window length. LightGBM classifier was validated to outperform other methods in the accuracy and prediction time of transient-state recognition. Finally, a simplified HMM model based on prior knowledge and observation result was constructed to predict upcoming locomotion. The results indicated that the locomotion prediction was over 91% accuracy. The proposed scheme implements the locomotion prediction at the initial stage of each gait and provides critical information for the gait control of lower limb prosthesis.http://dx.doi.org/10.1155/2020/8810663 |
| spellingShingle | Fang Peng Cheng Zhang Bugong Xu Jiehao Li Zhen Wang Hang Su Locomotion Prediction for Lower Limb Prostheses in Complex Environments via sEMG and Inertial Sensors Complexity |
| title | Locomotion Prediction for Lower Limb Prostheses in Complex Environments via sEMG and Inertial Sensors |
| title_full | Locomotion Prediction for Lower Limb Prostheses in Complex Environments via sEMG and Inertial Sensors |
| title_fullStr | Locomotion Prediction for Lower Limb Prostheses in Complex Environments via sEMG and Inertial Sensors |
| title_full_unstemmed | Locomotion Prediction for Lower Limb Prostheses in Complex Environments via sEMG and Inertial Sensors |
| title_short | Locomotion Prediction for Lower Limb Prostheses in Complex Environments via sEMG and Inertial Sensors |
| title_sort | locomotion prediction for lower limb prostheses in complex environments via semg and inertial sensors |
| url | http://dx.doi.org/10.1155/2020/8810663 |
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