1. Concept Review - P08001 Balance Training Bicycle Team Members Jennifer Zelasko - IE Carl Mangelsdorf - ME Jeff Tempest - ME James Nardo - ME Jon Bawas - EE Invited Participants Dr. DeBartolo – ME (Guide) Dr. Kempski - ME Dr. Marshall - IE

2. Agenda 4pm – 5pm Overview of Design Process Customer Needs and Related Engineering Metrics [5 minutes] Engineering Specifications [10 minutes] Mechanical Design Concepts Discussion of Well Established Concepts [10 minutes] Discussion of Tilt Resist Concepts [35 minutes]Discussion of Tilt Resist Concepts [35 minutes] 5pm – 5:30pm Safety Design Concepts Preliminary Hazard Analysis [15 minutes] - Concepts to prevent foreseeable hazards Feedback System Concept [10 minutes] Audio / Visual

3. QFD Matrix

4. Specifications

5. Telescoping Handlebars w/ Pin-lock Telescoping Seat Height w/ Pin-lock Pivoting Arm w/ Locked Positions Pillow Block Ball Bearing To Allow Lateral Tilt (X2) Pedal With Built In Resistance Knob (Purchase) Wheels For Portability Tilt Resistance - Adjustable Spring Assembly Swiveling Handlebars w/ Pin-lock Pin-lock control for upright “Locked Position” Overall Concept

6. Breakdown of Individual Concepts

7. Pivoting Arm w/ Locked Positions Incremental-Angle Hinge Push Button Adjustment Ergonomic Design – Adjustable to different patient sizes Pivot arm with gear teeth and wing nut compression

8. Swiveling Handlebars w/ Pin-lock Ball joint swivel bearing

9. Spring Plunger Pin (not removable) Mount pin on outside cylinder Inside cylinder has series of holes to position seat height Ergonomic Design – adjustable to different patient sizes Telescoping Seat Height and Handlebars w/ Pin-lock Spring Loaded Button on Pin (removable)

10. Pin-lock control for upright “Locked Position” Located at rear of bike where PT stands to spot patient Spring loaded Pull up and turn 90 degrees to keep nose pin up in un-locked position

11. Pillow Block Ball Bearing To Allow Lateral Tilt (X2) Rotating axis Safety Low Cross Member – Easy On / Off

12. Pedal With Built-In Resistance Knob Adjustable resistance knob Safety No chains / wheels -Low cross member

13. Wheels For Portability “Wheel Barrow” design Ergonomic Design –Easy to roll –Light lifting

14. Tilt Resistance -Adjustable Spring Assembly Non-linear spring inside of cylinder Adjustable piston used to compress spring, varying tilt levels

15. Spring compression is adjusted by spinning outer case Mounting bolt threads into worm w/ double nuts and washers to allow rotation Worm slides in and out of bottom piston with fairly tight tolerance to avoid binding Viewable piston height allow PT to select level of tilt and also provides upper piston movement Tilt Resistance - CONCEPT 1

16. Piston Fixed to worm gear Same Concept – Spring compression is adjusted with worm gear Tilt Resistance - CONCEPT 2

17. Top View Side ViewFront View Tilt Resistance - CONCEPT 3 (Cable and Pulleys) Spring compression is adjusted with Winch Winch remote control to rear of bike Safety - Cable / Pulleys / Winch enclosed inside of guard cover

18. Tilt Resistance - CONCEPT 4 (Door Handle) Top plate - Bump Stops ?

19. Safety Concepts Minimized moving parts Low cross member –Easy on/off Adjustable seat height Adjustable handlebar length and tilt degree “Wheel Barrow” portability

20. Foot Straps Wrist StrapsWide Seat Safety Guards/Covers over moving parts and pinch points Safety Concepts “Cruiser” style handlebars relaxed wrists good riding posture

21. Feedback Subsystem Sensor – Inclinometer –Based on accelerometer technology –Outputs analog voltage Ex: 44.4mV / degree –Voltages will be used to drive both audio and visual display to patient and PT Current Issue: Need to determine appropriate tilt ranges for balance and tip-over warnings Resolution: use sensor to test on PT patients to find average tilt ranges to be “fine-tuned” in final product

22. Feedback Subsystem Audio / Visual Display Concept –Visual Feedback LED Bank – indicating direction and level of tilt Color Code –Green – normal tilt range –Yellow – region to correct balance –Red – Tip-over condition imminent –Audio Feedback Speaker provides audio feedback –Adjustable volume –“Beeps” occur at yellow and red warning levels –Volume and pitch remain constant, but as tilt level increases, the intervals at which the beeping occurs will increase