Spectral Estimation And Supervised Classification Technique For Real Time Electromyography Pattern Recognition

Electromyography (EMG) signal is a biomedical signal which measures physical activity of human muscle.It has been acknowledged to be widely used in rehabilitation or recovery application system assisting physiotherapist to monitor a patient’s physical strength,function,motion and overall well-being...

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Main Author: Burhan, Nuradebah
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Published: 2018
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Burhan, Nuradebah
Spectral Estimation And Supervised Classification Technique For Real Time Electromyography Pattern Recognition
description Electromyography (EMG) signal is a biomedical signal which measures physical activity of human muscle.It has been acknowledged to be widely used in rehabilitation or recovery application system assisting physiotherapist to monitor a patient’s physical strength,function,motion and overall well-being by addressing the underlying physical issues.In application system associated with rehabilitation,a signal processing and classification techniques are implemented to classify EMG signal obtained.For real time application in the rehabilitation, the classification is crucial issue.The success of the signal classification depends on the selection of the features that represent a raw EMG signal in the signal processing.Therefore,a robust and resilient denoising method and spectral estimation technique have been acknowledged as necessary to distinguish and detect the EMG pattern.The present study was undertaken to determine the characteristic of EMG features using denoising method and spectral estimation technique for assessing the EMG pattern based on a supervised classification algorithm.In the study,the combination of time-frequency domain (TFD) and time domain (TD) were identified as the preferred denoising method and spectral estimation techniques.In the first part of study, the recorded EMG signal filtered the contaminated noise by using wavelet transform (WT) approach which implemented discrete wavelet transform (DWT) method of the wavelet-denoising signal. Subsequently,the filtered signal containing useful information was extracted by three methods  root mean square (RMS),mean absolute value (MAV),and autoregressive (AR) covariance,all of which are commonly used in TD.A comparative analysis of the three different techniques was performed based on the accuracy performance of the EMG pattern classification using linear vector quantization (LVQ) neural network.In the experimental work undertaken,six healthy subjects comprised of males and females were selected. Three sets of resistance band loads,namely 5 kg,9 kg,and 16 kg were used as a force during the biceps brachii muscle contraction in the rehabilitation exercise.Each of the subject was required to perform three levels of the arm angle positions (30˚, 90˚,and 150˚) for each set of resistance band load.The results of the experiment showed that Daubechies6 (db6) was the most appropriate DWT method including a 6-level decomposition,upholding soft rigrsure and heursure threshold rules,and a single-level threshold rescaling for the wavelet denoising signal analysis.From the three different techniques in extract feature vector as an input for LVQ classifier,the study concluded that the best system performance was the AR covariance method, where it obtained the average percentage of 95.56% for all classes in the EMG pattern recognition.
format Thesis
qualification_name Master of Philosophy (M.Phil.)
qualification_level Master's degree
author Burhan, Nuradebah
author_facet Burhan, Nuradebah
author_sort Burhan, Nuradebah
title Spectral Estimation And Supervised Classification Technique For Real Time Electromyography Pattern Recognition
title_short Spectral Estimation And Supervised Classification Technique For Real Time Electromyography Pattern Recognition
title_full Spectral Estimation And Supervised Classification Technique For Real Time Electromyography Pattern Recognition
title_fullStr Spectral Estimation And Supervised Classification Technique For Real Time Electromyography Pattern Recognition
title_full_unstemmed Spectral Estimation And Supervised Classification Technique For Real Time Electromyography Pattern Recognition
title_sort spectral estimation and supervised classification technique for real time electromyography pattern recognition
granting_institution UTeM
granting_department Faculty Of Electrical Engineering
publishDate 2018
url http://eprints.utem.edu.my/id/eprint/23299/1/Spectral%20Estimation%20And%20Supervised%20Classification%20Technique%20For%20Real%20Time%20Electromyography%20Pattern%20Recognition.pdf
http://eprints.utem.edu.my/id/eprint/23299/2/Spectral%20Estimation%20And%20Supervised%20Classification%20Technique%20For%20Real%20Time%20Electromyography%20Pattern%20Recognition.pdf
_version_ 1747834030775074816
spelling my-utem-ep.232992022-03-17T12:14:06Z Spectral Estimation And Supervised Classification Technique For Real Time Electromyography Pattern Recognition 2018 Burhan, Nuradebah T Technology (General) TK Electrical engineering. Electronics Nuclear engineering Electromyography (EMG) signal is a biomedical signal which measures physical activity of human muscle.It has been acknowledged to be widely used in rehabilitation or recovery application system assisting physiotherapist to monitor a patient’s physical strength,function,motion and overall well-being by addressing the underlying physical issues.In application system associated with rehabilitation,a signal processing and classification techniques are implemented to classify EMG signal obtained.For real time application in the rehabilitation, the classification is crucial issue.The success of the signal classification depends on the selection of the features that represent a raw EMG signal in the signal processing.Therefore,a robust and resilient denoising method and spectral estimation technique have been acknowledged as necessary to distinguish and detect the EMG pattern.The present study was undertaken to determine the characteristic of EMG features using denoising method and spectral estimation technique for assessing the EMG pattern based on a supervised classification algorithm.In the study,the combination of time-frequency domain (TFD) and time domain (TD) were identified as the preferred denoising method and spectral estimation techniques.In the first part of study, the recorded EMG signal filtered the contaminated noise by using wavelet transform (WT) approach which implemented discrete wavelet transform (DWT) method of the wavelet-denoising signal. Subsequently,the filtered signal containing useful information was extracted by three methods  root mean square (RMS),mean absolute value (MAV),and autoregressive (AR) covariance,all of which are commonly used in TD.A comparative analysis of the three different techniques was performed based on the accuracy performance of the EMG pattern classification using linear vector quantization (LVQ) neural network.In the experimental work undertaken,six healthy subjects comprised of males and females were selected. Three sets of resistance band loads,namely 5 kg,9 kg,and 16 kg were used as a force during the biceps brachii muscle contraction in the rehabilitation exercise.Each of the subject was required to perform three levels of the arm angle positions (30˚, 90˚,and 150˚) for each set of resistance band load.The results of the experiment showed that Daubechies6 (db6) was the most appropriate DWT method including a 6-level decomposition,upholding soft rigrsure and heursure threshold rules,and a single-level threshold rescaling for the wavelet denoising signal analysis.From the three different techniques in extract feature vector as an input for LVQ classifier,the study concluded that the best system performance was the AR covariance method, where it obtained the average percentage of 95.56% for all classes in the EMG pattern recognition. 2018 Thesis http://eprints.utem.edu.my/id/eprint/23299/ http://eprints.utem.edu.my/id/eprint/23299/1/Spectral%20Estimation%20And%20Supervised%20Classification%20Technique%20For%20Real%20Time%20Electromyography%20Pattern%20Recognition.pdf text en public http://eprints.utem.edu.my/id/eprint/23299/2/Spectral%20Estimation%20And%20Supervised%20Classification%20Technique%20For%20Real%20Time%20Electromyography%20Pattern%20Recognition.pdf text en validuser https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=112688 mphil masters UTeM Faculty Of Electrical Engineering 1. 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