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Group 11- ASME Design Competition

Group 11- ASME Design Competition. Alicia Christie Desmond Bourgeois Toddrick Ruff. Over View. Introduction Needs Assessment and Product Specification Concept Generation Prototyping Final Design Manufacturing and Assembly Testing Cost Analysis Conclusion

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Group 11- ASME Design Competition

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  1. Group 11- ASME Design Competition • Alicia Christie • Desmond Bourgeois • Toddrick Ruff

  2. Over View • Introduction • Needs Assessment and Product Specification • Concept Generation • Prototyping • Final Design • Manufacturing and Assembly • Testing • Cost Analysis • Conclusion • Recommendations / Improvements • Acknowledgement

  3. Introduction Score S = Σ (R*t) +1000P - W - A - 1000T – 5s R = designated rock score t = target multiplier W = Weight of the vehicle in grams A = milliamp-hours available to the device according to the battery labels T = Times device touches border tape s = seconds to complete task, maximum 240 P = bonus for parking vehicle at end of task (1 = parked, 0 = not parked) Schematic of Test Course 2 – 1700 pt rocks 1 – 1600 pt 2 - 1500pt 2 – 1000pt

  4. Needs Assessment / Product Specification ROBOT Must fit into a box 6.5 x 6.5 x 14.5 in Needs to have the ability of picking up rocks ranging from 2 to 4 cm Deliver rocks to receiving area with accuracy Climb over 3.5 in high barriers Stay in bounds and maneuver around obstacles Collection and Transportation Maneuver over obstacles swiftly Ejection of rocks

  5. Concept Generation – External Sources Stair Climbing Robot - Mechatronics, Ariel University Center Spiral Stair Climber Zaurus Phoenix Mars Lander Robotic Arm Front-end Loader Packbot

  6. Concept Generation – Internal Sources Maneuver over obstacles swiftly Ramp Carrying Robot Tank Drive Individual Tank Treads Expandable legs Front Spiral

  7. Concept Generation – Internal Sources Collection and Transportation of rocks Chassis Drop Robotic Arm Street Sweeper Air Jets Dropping off rocks in receiving area Dump Truck Style Trap Doors Single Door

  8. Final Design- Collector / Expandable Body continuous rotation servo Vampowerpro

  9. Final Design- Controls / Electronics Speed Controllers Motors Original Transmitter Receiver Modified Transmitter

  10. = LOCKED COMPONENT Final Design- Drive Train Outer Shaft Inner Shaft Y-Brace Wheel Gear Assembly Pinion Pulley Motor Motor Belt Shaft Gear Outer Shaft Inner Shaft T ratio=Driven/Drive Common shaft gears = 1:1 Gears in series = No torque increase Idle Gears Shaft Gear Y-Brace

  11. Final Design- Drive Train

  12. Manufacturing and Assembly • Used a Dremel Tool for rock collector, knife modifications, and for modifications to the platform to attach the expandable body • Motor mounts, platform, rear and front drive axel, Y-brackets, and false floor made or modified in machine shop • Utility knife for removing material from wheels and wires • Screw drivers • Allen Wrenches • Super Glue • Mighty Putty • 3-56 screws • Needle Nose Pliers

  13. Testing- Rock Collector • Conduct strain and force analysis requirements • Assemble rock collector • Engage servo • Load doors with rocks Test Results

  14. Testing: Electrical Components • Sizing Batteries • Motor Test • Simulated Load Test • Strobe Light RPM rating • Milliamp hour calculation • Total: 1500 mAh • Wiring Test • Peg board setup • Component Synchronization • Radio Transmitter/Receiver

  15. Testing- Drive Train • Trial1 • Fully assemble robot (motors, mounts, belts, etc.) • Check belt and pulley alignment • Check belt tension • Check for collisions of parts • Engage drive motors Test Results Trial1 = Binding of shafts Trial 2 = Binding of shafts Trial 3= Binding of shafts • Trial 2 • Reiteration of Trial1 • Trial 3 • Reiteration of Trial1

  16. = LOCKED COMPONENT Conclusion Ideal Alignment Actual Alignment Front View Front View Side View Side View Concentration of Belt Force and Friction Belt Tension Belt Tension Clearance

  17. Recommendations • Possible Mechanical Modification • Utilize ball bearings (Uniform and reduced friction distribution) • Employ chain and sprocket sets (Reduced radial load) • Incorporate gear box at motor (Increased torque input) • Take advantage of compound gear train nature , Larger pinions on lower innermost pinions (Increased torque) • Possible Electrical Modification • Incorporate motors with more torque (servos are a possibility) • Size down batteries to calculated values ( Score increase) Desired Configuration Motor W/ More Torque Ball Bearings Chain Larger Pinion Sprockets

  18. Acknowledgements Sponsors American Society of Mechanical Engineers Boeing Individuals Dr. Carl Moore Dr. Dave Cartes Dr. Chiang Shih Dr. Daudi Waryoba

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