Team Members: Blake Anderson, Andrew Sharp, Courtney Shell

Goal: Build an ankle foot orthosis (AFO) that allows movement in the sagittal and coronal planes that is actuated in the coronal plane to provide a physiologic response to a cross-slope surface.

Introduction:

Prostheses and orthoses that restore function to and stabilize those with neuromuscular impairments typically provide energy storage and return in the sagittal plane. Some active devices have been designed with actuation in the sagittal plane, but little investigation of the ability of coronal plane actuation to assist in maneuverability and balance control has been completed. To that end, we propose to design and build an active ankle-foot orthosis with actuation and control in the coronal plane for maneuvering assistance that does not interfere with motion in the sagittal plane.

Initial Prototype:

See page: Prototype, Initial

Updated Prototype:

See page: Prototype, Updated

Final Product

Annotated, Small Video Demo.wmv

Mechanical System:

See page: Mechanical System

Electrical Circuit and Software:

See page: Electrical Circuit and Software

Bill of Materials

Electrical Components	Quantity	Mechanical Components	Quantity
Arduino Uno	1	Steel Extension Spring 4.25" Length, .719" OD, .105" Wire	2
Sabretooth 2x5 Motor Controller	1	Two-Piece Clamp-on Shaft Collar for 1/2" Diameter, Black-Oxide Steel	3
Advancer Technologies Muscle Sensor v3 Kit	1	Grooved Clevis Pin with Retaining Ring 18-8 Stainless Steel, 3/16" Diameter, 3/4" Length, 5/8" Usable L	2
Panasonic Model EVU-E3AF25B14, 10k Linear Potentiometer	1	Post-op Shoe	1
Polulu Metal Gearmotor, 131:1, 37Dx57L mm with 64 CPR encoder	1	Belt with Cushions (Cuff)	1
269k Resistor	1	Motor mount (L bracket)	1
220k Resistor	1	Action arm (footplate, aluminum)	1
9V Battery	2	Rotation shaft (aluminum)	1
120V AC to 12V DC Power Supply and Cord	1	Inner rotation ring (aluminum)	1
		Outer rotation ring (aluminum)	1
		Rail (goes up back of leg, aluminum)	1
		Slider (where motor mounts, aluminum)	1
		Crank (aluminum)	1
		Potentiometer bracket (Delrin)	1

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