Item – Theses Canada

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OCLC number
51495349
Link(s) to full text
LAC copy
LAC copy
Author
Leowinata, Sentiono,1972-
Title
A new strategy for multifunction myoelectric control using an array of surface electrodes.
Degree
M. Sc. -- University of New Brunswick, 2000
Publisher
Ottawa : National Library of Canada = Bibliothèque nationale du Canada, [2002]
Description
1 microfiche + 1 CD-ROM (12 cm).
Notes
Includes bibliographical references.
Abstract
One of the limitations of current multifunction myoelectric control systems is the amount of myoelectric signal data required to classify with a reasonable accuracy the signals to be used as a control input. The amount of data required introduces a time delay in the myoelectric control systems which hinders the development of a continuous type of control. A new strategy is proposed to handle this limitation by employing an array of surface electrodes and correlation feature vector. The aim is to develop a new strategy which can make a reasonably accurate decision faster than the mechanical response of the systems. An array of surface electrodes, placed around the targeted group of muscles, gives a broader and more complete characterization of the myoelectric signal for each type of contraction. The information captured by each channel is computed by correlation methods to form a correlation feature vector. The patterns exhibited by the correlation feature vector are used as an input to classifiers. A total of five basic classifiers were employed to test the strategy on simulated and real myoelectric signals data and results are presented. Using four myoelectric channels and a 10-feature vector, the strategy can provide input to the classifiers to reasonably classify six basic hand movements with as little as 50 ms of steady-state data. This shows that the update rate of the strategy is faster than the mechanical response of current prostheses limbs.* *This dissertation includes a CD that is compound (contains both a paper copy and a CD as part of the dissertation). The CD requires the following applications: MATLAB; Quattro Pro Viewer.
ISBN
0612655539
9780612655539