Development of a functional electrical stimulator with feedback control / Nur Liyana Azmi
Functional Electrical Stimulation (FES) is a means of passing small electrical impulses through nervous tissue of paralyzed muscles that is no longer controlled by patient. Its function is not only to improve impaired function but also to slow down or stop bone and muscle deterioration, and to im...
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| Format: | Thesis |
| Published: |
2012
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| Online Access: | http://studentsrepo.um.edu.my/7634/1/liyana.pdf http://studentsrepo.um.edu.my/7634/ |
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| Summary: | Functional Electrical Stimulation (FES) is a means of passing small electrical
impulses through nervous tissue of paralyzed muscles that is no longer controlled by
patient. Its function is not only to improve impaired function but also to slow down or stop
bone and muscle deterioration, and to improve circulation in paralyzed limbs of spinal cord
injury (SCI) and stroke patients. However, the major limitation of FES is muscle fatigue.
Moreover, most works on FES system are focussed on open loop mode which do not
automatically regulate the desired output. Thus, closed loop FES system need to be
developed. This research paper presents the work on developing a closed loop FES system
or FES system with feedback control. The work is divided into two parts namely the
development part and the experiment part. In the development part, a FES stimulator is
constructed. The FES stimulator includes the high voltage power and the current closedloop
control circuit. On the other hand, there are two sections in the experiment part. The
first experiment uses a laboratory setting with beaker and oscilloscope to ensure the closedloop
control is successful. The second part utilizes FES with real human muscle to be
stimulated with the voltage stepped up to overcome skin resistance. This project also
addressed the issue of varying the skin temperatures used as a feedback parameter of FES
system as this work has not been investigated before. |
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