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Senior Design ME 4000

Senior Design ME 4000. Downhill Mountain Bike for Riders with Spinal Cord Injury. Downhill Wheelchair Project. Jason Croft – jason.croft@utah.edu Duane Ferkovich - dferkovich@gmail.com Jason Hatch - jbhzkr@hotmail.com Mark Swenson - mtswenso@gmail.com Tom Tilley - ttilley72@yahoo.com.

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Senior Design ME 4000

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  1. Senior DesignME 4000 Downhill Mountain Bike for Riders with Spinal Cord Injury Downhill Wheelchair Project • Jason Croft – jason.croft@utah.edu • Duane Ferkovich - dferkovich@gmail.com • Jason Hatch - jbhzkr@hotmail.com • Mark Swenson - mtswenso@gmail.com • Tom Tilley - ttilley72@yahoo.com Project Advisor Dr. William Provancher – wil@mech.utah.edu Project SponsorDr. Jeffrey Rosenbluth – see Team to contact

  2. Design Team Tom Tilley, Duane Ferkovich, Mark Swenson, Jason Croft, Jason Hatch Project Advisor: Dr. Will Provancher Department of Mechanical Engineering University of Utah Project Sponsor: Dr. Jeffrey Rosenbluth, M.D., Spinal Cord Injury Medicine University of Utah

  3. Presentation Outline • Benchmarking • Project Definition • Customer Abilities • Design Requirements • Design Features • Opportunities Down Hill Wheelchair Team Logo Courtesy: Jason Croft

  4. Downhill Mountain Bike Benchmark Down Hill Wheelchair • Existing Downhill Wheelchairs: • Require complete manual dexterity • Require upper arm strength • Require trunk control • Uncomfortable • Rider can lose control • Manual drive of rear wheels Courtesy: Down Hill Wheelchair Team Down Hill Wheelchair Honda TRX450R RENO GAZETTE-JOURNAL October 10, 2003

  5. Project Definition Down Hill Wheelchair • Downhill Mountain Bike for riders with up to C6 Spinal Cord injury • Safe • Accommodate rider musculoskeletal limitations Courtesy: Jason Croft

  6. Customer Abilities Spinal Cord Injuries • C6 Spinal Cord Injury • Intact capabilities: • Wrist Extenders • Bicep Control • Shoulder & Deltoid Muscle Control • Limitations: • Chest & Abdominal Strength • Triceps Control • Hand flexor strength Courtesy: spinal-cord.org

  7. Design Requirements Down Hill Wheelchair • Safety • Rider Restraints • Roll Bar / Roll Cage • Remote Kill Switch to Apply Brakes • Steering and Braking • Inputs compatible with rider limitations • Vehicle Propulsion for Short Distances Courtesy: Jason Croft

  8. Design Features Down Hill Wheelchair • Safety • Rider Restraints (4-Point Harness) • Roll Bar / Roll Cage • Remote Kill Switch to Apply Brakes • Can also be Activated by Rider Roll Bar Courtesy: Jason Croft • Interchangeable Seating Interface • Adjustable Seat • Mono-Ski Seat

  9. Design Features Rider Controls • Steering • Steering via Deltoid Muscles • Right & Left Arm Motion Coupled Coupled Motion Physical Demonstration Steering Input Rider Making Right Turn Steering Input Courtesy: University of Utah Rehabilitation Clinic Courtesy: Jason Croft

  10. Left Brake Input Right Brake Input Design Features Rider Controls • Braking • Braking through wrist extension Courtesy: Jason Croft

  11. Design Features • Vehicle Propulsion for Short Distances • High torque • Low speed Rear View of Downhill Wheelchair Drive Shafts Drive Motors Courtesy: Jason Croft

  12. Fabrication and Assembly View of Downhill Wheelchair in Progress (November 27, 2006) Courtesy: DHW Team

  13. Opportunities for Further Development • Safety • Enhanced Braking control • Addition of vehicle sensors • Enhanced microcontroller program • Steering and Braking • Programmable braking interface for “Brake-by-wire” • Speed Governor • Regenerative Braking for improved range

  14. Acknowledgements • Thanks to Dr. Jeffrey Rosenbluth, M.D., for project support for prototype materials • Dr. Jeffrey Rosenbluth is part of the Division of Physical Medicine and Rehabilitation, Spinal Cord Injury Medicine, University of Utah • Thanks to the Physical Therapists of the Rehabilitation Center for their input into our design • Extra thanks to the project advisor, Dr. Will Provancher for design guidance

  15. Questions?? Jason Croft – mondonalds@gmail.com Duane Ferkovich – dferkovich@gmail.com Jason Hatch – jbhzkr@hotmail.com Mark Swenson – mtswenso@gmail.com Tom Tilley – ttilley72@yahoo.com Team Email – dhwchair@gmail.com Project Advisor Dr. William Provancher – wil@mech.utah.edu Project SponsorDr. Jeffrey Rosenbluth – see Team to contact

  16. Budget • Expected Total Cost: $5,900 • $6,000 available • University of Utah Hospital (Sponsor) • Team contributions • Spent: $3,500 • Suspension • Steering • Chassis • Projected Spending: $2,400 • $1000 wheels and hubs • $500 microcontroller • $500 miscellaneous • $400 seating

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