ALIGNMENT ALGORITHM FOR THE VESTIBULAR PROSTHESIS By: Brian Hensley Mentors: Dr. A. Shkel Ilya...
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Transcript of ALIGNMENT ALGORITHM FOR THE VESTIBULAR PROSTHESIS By: Brian Hensley Mentors: Dr. A. Shkel Ilya...
ALIGNMENT ALGORITHM FOR THE VESTIBULAR
PROSTHESIS
By:
Brian Hensley
Mentors:
Dr. A. Shkel
Ilya Chepurko
Graduate Student Team:
Monty Rivers
Adam Schofield
Alexander Trusov
Vestibular Prosthesis Overview There are
currently various types of VP
The overall goal of the lab is to create a totally implantable vestibular prosthesis
http://www.jvl.meei.harvard.edu/jvdl/prosthesis.html
Motivation
During surgery the implementation of the orientation does not have to be as precise
The Vestibular Prosthesis could shift later depending what it is attached to
http://biomedcentral.inist.fr
Project Overview
Areas which I am involved: Rotational
axes algorithm 3D Modeling
http://anorganik.uni-tuebingen.de/klaus/nmr/conventions/euler/euler.html
How the Signal Travels
Natural System Vestibular Prosthesis
http://anatomy.iupui.edu/courses/histo_D502/D502f04/lecture.f04/Earf04/Ear.f04.htmlhttp://www.psconsulting.net.au/ttraining.html
Gyroscope
Transfer Function
RotationalAxis
Algorithm
Transfer Function
The flow rate of endolymph in the ear was characterized in the following equation, by Fernandez and Goldberg in 1971:
)1()1(
1
1)(
21 ss
s
s
sfsH
L
A
A
Electrical Simulation
Wanted to see if the microchip accurately responded to input voltage by producing graph of transfer function
Incline Test
Did not have a tilt table to test, had to improvise
Used 4 different objects to prop gyro up against giving 4 angles: 8.45 28.38 50.31 59.32 1sin sin
Y Y
X X
Conclusion and Future Work
Either Rotational Algorithm would work Need to test to see which one would be
faster Apply Rotational Axis Algorithm to Three
axis system Strength of VP