Ankle Positioning DeviceFaculty Advisors: Dr. Bawab & Dr. Ringleb

Students: Vasile Grigorita, Dominick Hudson, Jin Hyuk Kim, Bryan Mazac, Christopher Parrish, and Christopher Villaire

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.

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.

Joint ranges of motion

Plantarflexion/Dorsiflexion Abductor/Adductor Eversion/Inversion

The other two motions are translations in the X and Y planes.

Product Features Easy to use interface

Undergo realistic loading via load cell

Obtain accurate ankle motion analysis.

Minimal machining and cost efficient.

Control Methods

Accelerometer & Gyro

Arduino Software

Lab-View

- Definition

Laboratory Virtual Instrument Engineering Workbench

A system-design platform and development environment for a Visual Programming Language

- Diagram

- Control Panel

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

Machining and Assembly Replaced welds with cap screws. Shimmed gap between pillow bearings

and weight plate was added.

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

Gantt Chart

Outstanding Tasks

Add an adjustable clamp to the foot plate

Add a joystick or handheld motion sensor to control servos