Table of Contents• Project Overview (brief explanation of leukodystrophy)• Reviewed customer needs• Reviewed engineering specs• Detailed system lay out• Mechanical design• Electrical design• Software design• BOM• Cost Layout• Current main risk assessment• MSD II plan• Test Plan
Project Overview – Leukodystrophy and Goal
Leukodystrophy:• Genetic condition in which myelin sheaths in
neurons degrade over time• Leads to difficulty moving and speakingOur goal:• Provide a customer who has leukodystrophy
with a way to enjoy electronic games using limited movements
Revised Customer Needs
Engineering Specifications (Revised)
System Layout
TOP LEVEL MECHANICAL DESIGN
A Preview…
Mounting Options
Mech. Design – subsystems
– Baseboard Assembly– Slide Mount Assembly (left and right)– Armrest Assembly (left and right)– Enclosure Assembly– Front Panel Assembly– Mount/Handle Assembly
Mech. Design – Purchase Component selection and analysis
• Joystick Options – Pros/cons• Baseboard Option – Purchase Option• Baseboard Options – weight, cost, pros/cons• Baseboard Options – Stress Analysis• Max power dissipation allowable with
enclosure
Mech. Design – Critical/manufactured components
• Baseboard Platform• Swivel Platforms (top and bottom)• Front Plate• Control Handles• Mount/Handle Brackets• Armrests• Slide Mounts?
Elec. Design – Block Diagram
Elec. Design - Each Schematic
Elec. Design – Component Selection and Analysis
• Cords• Gold plated switches• Battery
Software High Level Layout
Microcontroller Selection
Final Choice: Arduino Micro
• Familiar language semantics• Many examples/libraries available– USB interface on-chip
• Free IDE– Cross-platform (Windows, Mac, Linux)
• Sufficient I/O and processing capability• Small and lightweight• Relatively inexpensive
Arduino Software Flow Chart
GUI_App Model Diagram
Samsung Galaxy Tab Interface Methodologies
• Method 1 (preferred)
• Method 2
BOM
Cost Distribution
Risk Management
MSD I Plan
MSD II Plan
MSD II Plan
Testing Plans
• Table of specs and corresponding testing plans