P15001: Soft Ankle-Foot Orthotic

Final Review

Table of Contents

Performance vs. Requirements

Requirements P15001 meet all of the following requirements that are in green to the customer’s satisfaction.
The three yellow requirements are addressed below:
Below is a copy of the teams engineering requirements that gives qualitative values for the system’s performance. The requirements that they relate to is listed in the source column.

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BOM & Budget Tracking

Our Bill of Materials (BOM) displays the components that make up our final prototype
Bill of Materials

Our budget tracking document displays the total prototype cost

Budget Tracking

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Electrical Design

Circuit Board: Revision 2

Below is the updated schematic and layout for the the mistakes that were made in the first revision.
Schematic (left), Top Layout(Center) and Bottom Layout(Right)
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System Electrical Architecture

The system is electrically connected as described below. The two flow charts show the same system, but two different views. The flowchart to the left shows the system as a whole with less detail whereas the right show more detail of the electrical system.
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Code Flowchart

This flow chart shows the basic flow of the code that is used for the system. This shows how the switches and heelstrike work in moth active and passive mode.
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Mechanical Design

Muscle Design

A McKibbon air muscle was designed to raise the foot at the appropriate times, providing the necessary force and deflection. A final Solidworks model and muscle assembly are shown below:

The two plugs for the McKibbon muscle were designed to integrate the muscle into our final system. The plugs were designed in Solidworks and fabricated in RIT's machine shop. Pictures of integrated plugs, as well as detailed drawings for machining, are shown below:

Integrated Plug Drawing
Base Drawing
Lower Plug Drawing

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Lower Component Housing

Pictures of the Solidworks models and final Lower Component Housing Assembly are shown below:

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Upper Component Housing

Pictures of the final Upper Component Housing assembly are shown below:

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Switch Housing Design

The switch housing was designed to hold the 2 switches and 1 LED that help satisfy our engineering requirement of an easy to interface system. This switch holder helps contain all 3 components in one central location, and is attached to the AFO so it is located near the user's hip. If our system was taken to the market, this part would be plastic injected molded; this would allow for addition features that our 3D printing service could not support, including a lid to cover the switches and a lid to protect the wires. Therefore, a complete drawing is not included. A picture of the SolidWorks model, as well as the final assembly, is shown below:

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Assembly and Build Plan

Build Assembly Plan
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User's Manual

User's Manual
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Technical Paper

Technical Paper
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Next Steps

Future Plans
3 weeks

1 year

Post Mortem
What could we have done better?

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Home Planning & Execution Problem Definition Systems Design Subsystems Design Detailed Design Gate Review
Build Preparation Build & Test Integrate & Assemble System Validation System Verification Final Review