GROUP 9: SENIOR DESIGN DEANNA MCKENZIE MICHAEL D. BROWN WILLIAM THORNTON Gunnery Control Handle 1.

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Presentation transcript:

GROUP 9: SENIOR DESIGN DEANNA MCKENZIE MICHAEL D. BROWN WILLIAM THORNTON Gunnery Control Handle 1

Presentation Outline Project Scope Pro E Assembly Rapid Prototyping  Equipment  Center Body Microcontroller  Specs  Schematic Cost Analysis Future Plans  Rapid Prototype Handles  Complete Assembly  Optimize Assembly/Design Schedule Risk Assessment 2

Project Scope Design a generic simulator handle Reduce Weight Make handle interchangeable 3

Pro/E Assembly 4

Rapid Prototyping Equipment 5 Can print models up to 10” x 10” x 12” Prints with ABSplus thermoplastic  Production grade  Printed from bottom up Soluble supports during printing  Allows for more complex modeling

Center Body: Rapid Prototype 6 Material is layered ABS plastic Weaker than injection molded ABS Only to be used as prototype

Microcontroller 7 Arduino Uno Microcontroller  Open source  Thirteen digital pins plus ground pin  6 analog to digital converters  6 power source options  USB connectivity/power  Can be powered by adapter, USB or battery

Microcontroller: Schematic 8

Microcontroller Programming 9 Programming done in C Have written preliminary programs to show: Digital pins are working  When a button is pressed, an LED light will turn on. Analog pins are working  When variable resistor passes voltage threshold, an LED light will turn on. Currently working on using microcontroller in Visual Basic for a more user friendly GUI

Cost Analysis 10 PartQuantityUnit Price ($) Total Cost ($) Shaft Bearings Microcontroller Potentiometers Pinion Gear Gear cond. Wire15 ft0.31/ft cond. wire15 ft0.37/ft5.55 Total $ PartQuantityUnit Pr ice ($) Total Cost ($) Torsion Springs Buttons Buttons Hardware--- Triggers--- Total $ Future Orders Ordered We have currently received no pricing information for rapid prototyping material or services

Rapid Prototype Handles 11 Using the same method and machining for the center body Model for handles to evaluate design  Trigger holes are the right size  Placement of electronic wiring  Fits in the hand comparably to M1-Abrams and M2-Bradley Handles

Assemble Rapid Prototype 12 Make sure parts fit together according to design Evaluate size and feel of the handles and center body Redesign handles if needed

Optimize Design 13 Optimize parts and fabricate with injection molded engineering plastic Find correct torsion spring loading for each handle design Finalize code for microcontroller

Schedule 14 General Dynamics Trip:Feb. 23 Four Aker:Feb. 23 All parts ordered by:Feb. 25 Microcontroller:  Digital Button Programming Feb. 28  Analog (potentiometer) Programming March 4 Handles Printed:March 4 Assembly(w/out microcontroller)March 18 Debugging/Comp. IntegrationMarch 18 Full AssemblyMarch 25 Operations Manual/Final ReportsApril 4

Risks Possible Solutions Wiring space in shaft Internal/External springs Shaft mount strength Parts don’t arrive on schedule 2-types of wire May require redesign Thicken mount Use time to plan and reschedule 15 Risk Assessment We are a fair amount below budget as well, so we do have options if something goes wrong.

Questions 16 ???