1. #25: Elevator Controller for Individual with Multiple Sclerosis
Team Members:
Michele Lorenz-Team Leader
Emily Maslonkowski-Communications
Sara Karle-BSAC
Ashley Matsick-BWIG

2. Our Client Our Advisor Dr. John O. Fleming
Professor, Vice Chair, Neurology
Professor, Medical Microbiology and Immunology
University of Wisconsin Medical School
Our Advisor
Professor Naomi Chesler, PhD.
Department of Biomedical Engineering
University of Wisconsin-Madison

3. Outline Problem Statement Background: Multiple Sclerosis
Client Requirements
Designs 1,2,3
Design Matrix
Future Work

4. Problem Statement
Design a device capable of covering the distance from wheelchair to elevator buttons
Must exert a horizontal pushing force of 35.56N
Must be operated remotely (voice activated or with a mouth joystick)

5. Multiple Sclerosis (MS)
Autoimmune disease
Symptoms typically occur in early to mid adulthood
Immune system attacks myelin
Impairs ability of brain to communicate with muscles
Muscle atrophy is a secondary effect

6. Client Requirements
Functional in both elevator and hallway environments
Provide visual feedback to user of correct device-button contact
Weatherproof
Zero interference with current chair operation
10 year lifespan, multiple uses/day

7. Design #1: Robotic Car Three-wheeled base (1)
Telescoping rod extending from base (2)
Pushing shaft depresses button with car movement (3) 2 3

8. Design #2: Spring-Loaded Arm
top view
Wheelchair positioned appropriately
Internal catch (1) releases arm (2)
Arm rotates on hinge (3) to contact button
Motorized return mechanism
Vertical adjustment (rack-and-pinion) (4) 2 3 1 4 1
side view
side view

9. Design #3: The Crane Mounted to back of armrest
Telescoping rod (1) rotates to adjust to buttons
Crank rotates extending arm (2) up and forward
Shaft (3) pushes button 2 1 3

10. Design Matrix Weight Robotic Car Spring-loaded Arm The Crane Accuracy25 20 15
Ease of operation 18
Durability 7 10
Ease of construction/part replacement 4 8
Estimated Cost 3
Size 9
TOTAL
100 61 69 68

11. Future Work Narrow parameters necessary for design Merge designs 2 + 3
Construction/testing
Long-term: integrate control + docking

12. Questions?