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Graduate Student Team: Monty Rivers Adam Schofield Alexander Trusov. Alignment Algorithm for the Vestibular Prosthesis. By: Brian Hensley Mentors: Dr. A. Shkel Ilya Chepurko. Vestibular Prosthesis Overview. There are currently various types of VP - PowerPoint PPT Presentation
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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
Goal
http://www.stewart.cs.sdsu.edu/cs596-3dprog/lecs/index.html
The Vestibular Organs
http://www.neuroanatomy.wisc.edu/virtualbrain/BrainStem/13VNAN.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
Graph of Model
Graphic by Ilya Chepurko
Rotational Algorithm-Scalar Projection
http://www.nixfiles.com/critters/proposal-slides.html
Tests
Electrical Simulation
Single Gyroscope on rate table Flat Inclined
Electrical Simulation
Wanted to see if the microchip accurately responded to input voltage by producing graph of transfer function
Results of Electrical Simulation
Graphic by Ilya Chepurko
Rate Table Test of a Single Gyro The Flat Tests
Results of Rotation without Incline
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
Incline Tests
Vestibular Prosthesis
Unfolded Box Folded Box
3D Model Designed by Monty Rivers
Stress in Latches
2-D Silicon Beam Test
Width of Latch
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
Acknowledgements
NSF UCI
Dr. Shkel and Ilya Chepurko Microsystems Lab
Monty Rivers Adam Schofield Alex Trusov
IM-SURE Said Shokair IM-SURE Fellows
SAP