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EMG Signal Recognition Based on EMD Sample Entropy |
XI Xu-gang,ZHU Hai-gang,LUO Zhi-zeng,ZHANG Qi-zhong |
Intelligent Control & Robotics Institute, Hangzhou Dianzi University, Hangzhou, Zhejiang 310018, China |
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Abstract According to the chaotic and nonlinear characteristics of surface electromyography(sEMG), a fast and efficient hands movement sEMG pattern recognition method for real-time control of myoelectric prosthetic hand is designed. A multi-modeling pattern recognition method of sEMG features based on the empirical mode decomposition(EMD) sample entropy and clustering analysis is proposed. First, it decomposes the sEMG signal into a set of intrinsic mode functions (IMF), then combines some of the IMF which contains the useful information according to frequency effectiveness, and calculates the sample entropy of the combination.The sample entropy of two sEMG of the extensor carpi ulnaris and flexor carpi ulnaris constitute the feature vector, the clustering classifier which based on principal axis clustering arithmetic is applied to classify the four hand movements. The result shows that four movements (hand extension, hand grasps,wrist spreads and wrist bends) are successfully identified.The average recognition rate is 93%.The method achieved high recognition rate, anti-interference ability and less computation, that is suitable for the control of the myoelectric prosthetic hand.
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Fund:国家自然科学基金(60903084,61172134,61201300);浙江省自然科学基金(LY13F030017);浙江省科技计划项目(2014C33105) |
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