1. Ankle Positioning Device Faculty Advisors: Dr. Bawab & Dr. Ringleb Students: Vasile Grigorita, Dominick Hudson, Jin Hyuk Kim, Bryan Mazac, Christopher Parrish, and Christopher Villaire

2. Introduction  Ankle injuries are one of the most common injuries.  25,000 Ankle Injuries happen every day in America.  The ankle region consists of three joints which provide balance, strength, and stability.

3. Purpose  To design a device capable of loading and positioning the ankle in a closed kinetic chain so that the dynamics of the ankle can be realistically analyzed.

4. Joint ranges of motion Plantarflexion/Dorsiflexion Abductor/Adductor Eversion/Inversion The other two motions are translations in the X and Y planes.

5. Product Features  Easy to use interface  Undergo realistic loading via load cell  Obtain accurate ankle motion analysis.  Minimal machining and cost efficient.

6. Control Methods  Accelerometer & Gyro  Arduino Software  Lab-View

7. - Definition  Laboratory Virtual Instrument Engineering Workbench  A system-design platform and development environment for a Visual Programming Language

8. - Diagram

9. - Control Panel

10. Mechanical Design  Bearing Selection  Horizontal Translation  Side-mount track roller carriage and guide rails  3 internal track rollers per carriage  Vertical Translation  Self-lubricated pillow block linear sleeve  Chemical-resistant PFTE (Polytetrafluoroethylene) liner  Machining  Alignment issues with initial design utilizing base plate welds  Warping  Making adjustments after fabrication  Solution  Redesign all base plate and alignment sensitive components  Utilize U-channels for transition tiers  Assemble components with threaded fasteners

11. Machining and Assembly  Replaced welds with cap screws.  Shimmed gap between pillow bearings and weight plate was added.

12. The Device Operation  Can be operated remotely or by keyboard inputs  Motion can be utilized in series or in parallel  Safety switches will prevent further injury

13. Gantt Chart

14. Outstanding Tasks  Add an adjustable clamp to the foot plate  Add a joystick or handheld motion sensor to control servos