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Alignment Algorithm for the Vestibular Prosthesis

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

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Alignment Algorithm for the Vestibular Prosthesis

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  1. Graduate Student Team: Monty Rivers Adam Schofield Alexander Trusov Alignment Algorithm for the Vestibular Prosthesis By: Brian Hensley Mentors: Dr. A. Shkel Ilya Chepurko

  2. 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

  3. 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

  4. Project Overview • Areas which I am involved: • Rotational axes algorithm • 3D Modeling http://anorganik.uni-tuebingen.de/klaus/nmr/conventions/euler/euler.html

  5. Goal http://www.stewart.cs.sdsu.edu/cs596-3dprog/lecs/index.html

  6. The Vestibular Organs http://www.neuroanatomy.wisc.edu/virtualbrain/BrainStem/13VNAN.html

  7. How the Signal Travels Natural System Vestibular Prosthesis Gyroscope Rotational Axis Algorithm Transfer Function http://anatomy.iupui.edu/courses/histo_D502/D502f04/lecture.f04/Earf04/Ear.f04.html http://www.psconsulting.net.au/ttraining.html

  8. Transfer Function • The flow rate of endolymph in the ear was characterized in the following equation, by Fernandez and Goldberg in 1971:

  9. Graph of Model Graphic by Ilya Chepurko

  10. Rotational Algorithm-Scalar Projection http://www.nixfiles.com/critters/proposal-slides.html

  11. Tests • Electrical Simulation • Single Gyroscope on rate table • Flat • Inclined

  12. Electrical Simulation • Wanted to see if the microchip accurately responded to input voltage by producing graph of transfer function

  13. Results of Electrical Simulation Graphic by Ilya Chepurko

  14. Rate Table Test of a Single Gyro • The Flat Tests

  15. Results of Rotation without Incline

  16. 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

  17. Incline Tests

  18. Vestibular Prosthesis Unfolded Box Folded Box 3D Model Designed by Monty Rivers

  19. Stress in Latches

  20. 2-D Silicon Beam Test

  21. Width of Latch

  22. 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

  23. Acknowledgements • NSF • UCI • Dr. Shkel and Ilya Chepurko • Microsystems Lab • Monty Rivers • Adam Schofield • Alex Trusov • IM-SURE • Said Shokair • IM-SURE Fellows SAP

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